List of the Paleozoic life of Oklahoma

This list of the Paleozoic life of Oklahoma contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Oklahoma and are between 541 and 252.17 million years of age.

A
  • †Abludoglyptocrinus
  • †Abyssocrinus
    • †Abyssocrinus antiquus
  • †Abyssomedon – type locality for genus
    • †Abyssomedon williamsi – type locality for species
  • †Acanthobolbina
    • †Acanthobolbina loeblichi
  • †Acanthocladia
    • †Acanthocladia ouachitensis
  • †Acanthocrania
    • †Acanthocrania erecta
    • †Acanthocrania oklahomensis
    • †Acanthocrania subquadrata
  • †Acanthopecten
    • †Acanthopecten grandis – type locality for species
  • †Acanthospirina
  • †Acanthotriletes
  • †Acheloma
    • †Acheloma cumminsi – or unidentified comparable form
    • †Acheloma dunni – type locality for species
  • †Acidiphorus
    • †Acidiphorus williamsi – or unidentified comparable form
  • Illustration of a fossilized skull in multiple views of the Permian primitive reptile Acleistorhinus
    †Acleistorhinus – type locality for genus
    • †Acleistorhinus pteroticus – type locality for species
  • †Acolocrinus
    • †Acolocrinus crinerensis
  • †Actinotodissus
    • †Actinotodissus longitaleosus
  • †Adairia
    • †Adairia adairensis – type locality for species
  • †Adornofusa
    • †Adornofusa microhapsis
  • †Aechmina
    • †Aechmina geneae
    • †Aechmina longispina
    • †Aechmina truncata – tentative report
  • †Aechminaria
    • †Aechminaria ambigua
    • †Aechminaria longispina
    • †Aechminaria truncata – tentative report
  • †Aechminella
    • †Aechminella buchanani – type locality for species
    • †Aechminella trispinosa – type locality for species
  • †Affinocrinus
    • †Affinocrinus grandis – type locality for species
    • †Affinocrinus normalis
    • †Affinocrinus orbis – type locality for species
    • †Affinocrinus politus – type locality for species
    • †Affinocrinus progressus – type locality for species
  • †Alatisporites
    • †Alatisporites pustulatus
  • †Albertoceras
    • †Albertoceras minimum
  • †Alcimocrinus
    • †Alcimocrinus girtyi
  • Fossilized fronds of the Carboniferous-Early Cretaceous seed fern Alethopteris
    †Alethopteris
    • †Alethopteris ambigua
    • †Alethopteris lesquereuxii
    • †Alethopteris serlii
    • †Alethopteris sullivantii
  • †Alexandrinia
    • †Alexandrinia directa – type locality for species
  • †Alisporites
    • †Alisporites aequus – type locality for species
    • †Alisporites zapfei
  • †Allocrinus
    • †Allocrinus divergens
    • †Allocrinus globulus
    • †Allocrinus irroratus
  • †Alloiopteris
  • †Allorisma
    • †Allorisma albequus
    • †Allorisma maynardwhitei – type locality for species
    • †Allorisma snideri – type locality for species
  • †Allotropiophyllum – or unidentified comparable form
  • †Amarixys
    • †Amarixys gracilis
  • †Amaurotoma – tentative report
    • †Amaurotoma knighti – type locality for species
  • †Ameura
    • †Ameura major
  • Ammobaculites
  • Ammodiscus
  • †Ammovertella
    • †Ammovertella inversa
  • †Ampelocrinus
    • †Ampelocrinus convexus
  • †Amphilichas
    • †Amphilichas subpunctatus
  • †Amphipsalidocrinus
  • †Amphiscapha
    • †Amphiscapha catilloides
  • †Amphisella
  • †Amphissites
    • †Amphissites bradfieldi – type locality for species
    • †Amphissites bushi – type locality for species
    • †Amphissites marginiferus
    • †Amphissites miseri – type locality for species
    • †Amphissites nodosus
    • †Amphissites rugosus
    • †Amphissites wapanuckensis
  • †Amphistrophia
    • †Amphistrophia prolongata
  • †Amsdenina
  • †Amsdenoides
  • †Amygdalocystites
    • †Amygdalocystites florealis
    • †Amygdalocystites tribrachiatus
  • †Anabathra
    • †Anabathra pulcherrima
  • †Anachoropteris
    • †Anachoropteris gillotii
    • †Anachoropteris involuta
  • †Anachroropteris
    • †Anachroropteris involuta
  • †Ananaspis
    • †Ananaspis guttulus
  • †Anapiculatasporites
    • †Anapiculatasporites spinosus
  • †Anapiculatisporites
    • †Anapiculatisporites edgarensis
    • †Anapiculatisporites spinosus
  • †Anaplanisporites
  • †Anasobella
  • †Anastrophia
    • †Anastrophia delicata
    • †Anastrophia grossa – type locality for species
  • †Anataphrus
    • †Anataphrus kermiti – type locality for species
  • †Anatiferocystis
    • †Anatiferocystis papillata
  • †Anchicrinus
    • †Anchicrinus echinosacculus – type locality for species
    • †Anchicrinus planulatus – type locality for species
    • †Anchicrinus rugosus
  • †Ancistrorhyncha
    • †Ancistrorhyncha costata
    • †Ancistrorhyncha globularis
  • †Ancoradella
    • †Ancoradella ploeckensis
  • †Anematina
  • †Angelosaurus
    • †Angelosaurus romeri – type locality for species
  • †Anguisporites
    • †Anguisporites contortus – type locality for species
    • †Anguisporites intonsus – type locality for species
  • † Anisophyllum
  • Fossil of the Carboniferous horsetail relative Annularia
    †Annularia
    • †Annularia sphenophylloides
    • †Annularia stellata
  • †Anobasicrinus
    • †Anobasicrinus obscurus
  • †Anolotichia
    • †Anolotichia deckeri
    • †Anolotichia impolita
    • †Anolotichia spinulifera
  • †Anomalogramma
    • †Anomalogramma parva
  • †Anomalohymen – type locality for genus
    • †Anomalohymen dochmus – type locality for species
  • †Anomalorthis
    • †Anomalorthis oklahomensis
  • †Anomphalus
  • †Anthracoceras
    • †Anthracoceras oklahomense – type locality for species
  • †Anthracocrinus
    • †Anthracocrinus primitivus
  • †Anthraconeilo
    • †Anthraconeilo taffiana
  • †Anthracospirifer
    • †Anthracospirifer opimus
  • †Anthracotarbus – type locality for genus
    • †Anthracotarbus hintoni – type locality for species
  • †Anthyrsis
  • †Antiquatonia
  • †Antirhynchonella
    • †Antirhynchonella thomasi
  • †Anulocrinus
    • †Anulocrinus drummuckensis – or unidentified related form
  • †Apachella
    • †Apachella capertoni – type locality for species
  • †Aparchites
    • †Aparchites maccoyii
    • †Aparchites millepunctatus
    • †Aparchites perforata
  • †Aphlebia
  • †Apianurus
  • †Apiculatasporites
    • †Apiculatasporites latigranifer
    • †Apiculatasporites setulosus
    • †Apiculatasporites spinulistratus
  • †Apodasmocrinus
    • †Apodasmocrinus daubei
  • †Apographiocrinus
  • †Apotocardium
    • †Apotocardium lanterna
    • †Apotocardium plautum
  • †Apsidoneura
    • †Apsidoneura flexa
  • †Arakespongia – type locality for genus
    • †Arakespongia mega – type locality for species
  • †Araucarites
  • †Arbucklecystis
  • Fossilized shell and spines of the Late Devonian-Permian sea urchin Archaeocidaris
    †Archaeocidaris
    • †Archaeocidaris megastyla
  • †Archaeocrinus
    • †Archaeocrinus lacunosus – or unidentified comparable form
    • †Archaeocrinus subglobosus
    • †Archaeocrinus subovalis
  • Archaeolithophyllum
  • †Archaeophiomusium
    • †Archaeophiomusium burrisi
  • †Archaeoscyphia
    • †Archaeoscyphia annulata
  • †Archeria
    • †Archeria victori – type locality for species
  • Fossils of the Carboniferous-Permian bryozoan Archimedes
    †Archimedes
    • †Archimedes ardmorensis – type locality for species
    • †Archimedes distans
    • †Archimedes meekanoides
    • †Archimedes meekanus – or unidentified comparable form
    • †Archimedes perminimus – or unidentified related form
    • †Archimedes pitkinensis – type locality for species
    • †Archimedes pseudoswallovanus – type locality for species
    • †Archimedes sublaxus – or unidentified comparable form
  • †Ardmosteges – type locality for genus
    • †Ardmosteges orchamus – type locality for species
  • †Arkacrinus
    • †Arkacrinus constrictus – type locality for species
    • †Arkacrinus dubius
  • †Arkanites
    • †Arkanites relictus
  • †Arthropora
    • †Arthropora simplex
  • †Artinska
    • †Artinska clara
    • †Artinska ovata
  • †Asaphocrinus
    • †Asaphocrinus densus
  • †Ascograptus
  • †Asketopalla
    • †Asketopalla formosula
  • †Aspidosaurus – or unidentified comparable form
  • †Astartella
    • †Astartella concentrica
    • †Astartella vera
  • †Asterophyllites
  • †Asthenohymen
    • †Asthenohymen apicalis – type locality for species
    • †Asthenohymen latus – type locality for species
    • †Asthenohymen minutus – type locality for species
    • †Asthenohymen parvulus – type locality for species
    • †Asthenohymen triangularis – type locality for species
  • †Astraeospongium
  • †Astrocystites
  • †Atactoporella
    • †Atactoporella bellula
  • †Atelelasma
    • †Atelelasma oklahomense
  • †Athlocrinus
    • †Athlocrinus dejustus – type locality for species
  • †Athyris
  • †Atokacrinus
    • †Atokacrinus tumulosus – type locality for species
  • †Atrapocrinus – type locality for genus
    • †Atrapocrinus mutatus – type locality for species
  • †Atribonium
    • †Atribonium evexum – or unidentified comparable form
  • Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa
    †Atrypa
    • †Atrypa arctostriata
    • †Atrypa oklahomensis
    • †Atrypa tennesseensis
  • †Atrypina
    • †Atrypina hami
  • †Aulacotheca – or unidentified comparable form
  • †Aurimorpha
    • †Aurimorpha varia
  • †Auriptygma
  • †Austinella
    • †Austinella multicostella
  • Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten
    †Aviculopecten
    • †Aviculopecten halensis
    • †Aviculopecten multilineatus
    • †Aviculopecten nodocosta – type locality for species
    • †Aviculopecten tomlinsoni – type locality for species
  • †Avonia – tentative report
    • †Avonia snideri – type locality for species
    • †Avonia spinosa – type locality for species
  • †Axinolobus

B
  • †Bactrites
    • †Bactrites smithianus
  • †Bactrocrinites
    • †Bactrocrinites oklahomensis
  • †Baeotherates – type locality for genus
    • †Baeotherates fortsillensis – type locality for species
  • †Baiosoma
    • †Baiosoma batilia – type locality for species
  • Bairdia
    • †Bairdia ardmorensis – type locality for species
    • †Bairdia billjohnsoni – type locality for species
    • †Bairdia croneisi – type locality for species
    • †Bairdia folgeri
    • †Bairdia forakerensis
    • †Bairdia multihilosa – type locality for species
  • †Bairdiocypris
  • †Bairdocypris – tentative report
    • †Bairdocypris transversus
  • †Balticella
    • †Balticella deckeri
    • †Balticella elongata
  • †Baltisphaeridium
    • †Baltisphaeridium accinctum
    • †Baltisphaeridium bystrentos
    • †Baltisphaeridium disparicanale
    • †Baltisphaeridium parvigranosum
    • †Baltisphaeridium trophirhapium
  • †Barycrinus – tentative report
    • †Barycrinus herculeus – or unidentified related form
  • †Bascomella
    • †Bascomella gigantea – or unidentified comparable form
  • †Bathysiphon
  • †Bathyurellus
    • †Bathyurellus arbucklensis
    • †Bathyurellus inflatus
  • †Bathyurus
    • †Bathyurus superbus
  • †Batostoma
    • †Batostoma chapparsi
    • †Batostoma chazyensis
    • †Batostoma cumingsi
    • †Batostoma ramosa
    • †Batostoma sheldonensis
    • †Batostoma winchelli
  • †Beecheria
  • †Beedeina
  • †Bellazona
    • †Bellazona bella
  • Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon
    †Bellerophon
    • †Bellerophon wewokanus
  • †Bellimurina
    • †Bellimurina compressa
    • †Bellimurina subquadrata
  • †Belodella
    • †Belodella silurica
  • †Benthamaspis
    • †Benthamaspis mediacrista – or unidentified comparable form
    • †Benthamaspis onomeris
    • †Benthamaspis rhochmotis
  • †Berestovia
  • †Bicornella
    • †Bicornella tricornis
    • †Bicornella unicornis – type locality for species
  • †Bigalea
  • †Bilinguites
    • †Bilinguites eliasi – type locality for species
  • †Bisatoceras – type locality for genus
    • †Bisatoceras primum – type locality for species
  • †Bistomiacystis
  • †Boesites
    • †Boesites girtyi
  • †Bolbocephalus
    • †Bolbocephalus convexus – or unidentified comparable form
    • †Bolbocephalus jeffersonensis
    • †Bolbocephalus myktos
    • †Bolbocephalus stitti
  • †Bollia
  • Illustration of a fossilized skull of the Permian primitive reptile Bolosaurus
    †Bolosaurus
    • †Bolosaurus grandis – type locality for species
    • †Bolosaurus striatus
  • †Bolterpeton – type locality for genus
    • †Bolterpeton carrolli – type locality for species
  • †Borestus
    • †Borestus pagoda – type locality for species
  • †Bothriocidaris
  • †Botryocrinus
    • †Botryocrinus parcus
  • †Botryopteris
    • †Botryopteris forensis
    • †Botryopteris mediatena
    • †Botryopteris tridentata
  • †Brabeocrinus
    • †Brabeocrinus primus – type locality for species
  • †Brachydegma – tentative report
    • †Brachydegma caelatum
  • †Brachymimulus
    • †Brachymimulus americanus
  • †Brachyprion
    • †Brachyprion arata
    • †Brachyprion attenuata
    • †Brachyprion gibber
    • †Brachyprion gibbera – type locality for species
  • †Brachythyris
    • †Brachythyris chouteauensis
  • †Bradyina
  • †Bransonella – type locality for genus
    • †Bransonella tridentata – type locality for species
  • †Breileenia
    • †Breileenia minnewankensis
  • †Brevilamnulella
    • †Brevilamnulella thebesensis
  • †Bromidechinus – type locality for genus
    • †Bromidechinus rimaporus – type locality for species
  • †Bromidella
    • †Bromidella reticulata
  • †Bromidocrinus
  • †Bromidocystis
  • †Buckhornia
    • †Buckhornia carteri
  • †Bumastoides
    • †Bumastoides milleri – or unidentified comparable form
  • †Buxtonia
    • †Buxtonia incurvatus
    • †Buxtonia semicircularis
    • †Buxtonia suttoni – type locality for species
  • Bythocypris
    • †Bythocypris cylindrica
    • †Bythocypris kershavii
    • †Bythocypris spinosa
    • †Bythocypris tomlinsoni
  • †Bythopora
    • †Bythopora subgracilis

C
  • Life restoration of the Permian amphibian Cacops
    †Cacops
    • †Cacops morrisi – type locality for species
    • †Cacops woehri – type locality for species
  • †Cadiospora
    • †Cadiospora magna
  • †Caenanoplia
    • †Caenanoplia burlingtonensis
  • †Calamaspora
    • †Calamaspora breviradiata – or unidentified comparable form
  • Fossilized stems from the Carboniferous-Permian horsetail relative Calamites
    †Calamites
  • †Calamospora
    • †Calamospora breviradiata
    • †Calamospora hartungiana
    • †Calamospora liquida
    • †Calamospora mutabilis
    • †Calamospora pedata
    • †Calamospora straminea
  • †Calathium
  • †Calceocrinus
    • †Calceocrinus humilis
  • †Callipteris
  • †Callistophyton
    • †Callistophyton boyssetii
  • †Calohymen – type locality for genus
    • †Calohymen permianus – type locality for species
  • †Calycocrinus
    • †Calycocrinus furnishi – type locality for species
    • †Calycocrinus symmetricus – type locality for species
  • Fossil of the Early Ordovician-Early Devonian trilobite Calymene
    †Calymene
    • †Calymene clavicula
  • †Calyptaulax
    • †Calyptaulax annulata
  • †Camarophorella
  • †Camarotoechia
    • †Camarotoechia altisulcata
    • †Camarotoechia carmelensis
    • †Camarotoechia filistriata
    • †Camarotoechia haraganensis
    • †Camarotoechia oklahomensis
  • † Camerate
  • †Camerella
    • †Camerella anteroplicata
    • †Camerella oklahomensis
  • †Camorphoria
  • †Campbelloceras
  • †Cancelloceras
    • †Cancelloceras huntsvillense – type locality for species
  • †Cancrinella
    • †Cancrinella boonensis
  • †Caneyella
  • †Capnophyllum
  • †Captorhinikos
    • †Captorhinikos chozaensis
    • †Captorhinikos parvus – type locality for species
    • †Captorhinikos valensis
  • Fossilized skeletons of the Permian reptile Captorhinus
    †Captorhinus
    • †Captorhinus aguti
    • †Captorhinus kierani – type locality for species[1]
    • †Captorhinus laticeps – type locality for species
    • †Captorhinus magnus – type locality for species
  • †Carabocrinus
    • †Carabocrinus loeblichi
    • †Carabocrinus logani
    • †Carabocrinus treadwelli
    • †Carabocrinus tumidus
    • †Carabocrinus vancortlandi – or unidentified comparable form
  • †Carbonocoryphe
    • †Carbonocoryphe planucauda
  • †Carboprimitia
    • †Carboprimitia rotunda – or unidentified comparable form
  • Life restoration of the Permian amphibian Cardiocephalus
    †Cardiocephalus
    • †Cardiocephalus peabodyi – type locality for species
    • †Cardiocephalus sternbergi – or unidentified comparable form
  • †Cardiodella
    • †Cardiodella abbreviatus
    • †Cardiodella arcuatus
    • †Cardiodella densus
    • †Cardiodella robustus
  • †Carolinites
    • †Carolinites sibiricus
  • †Caryocaris – tentative report
  • †Caryocrinites
  • †Cavellina
    • †Cavellina lata
    • †Cavellina subovata
  • †Cavernula
    • †Cavernula coccidia
    • †Cavernula pediculata
  • †Centrotarphyceras
    • †Centrotarphyceras powersi
  • †Ceramopora
    • †Ceramopora unapensis
  • †Ceramoporella
    • †Ceramoporella ingenua
  • †Ceratiocaris
  • †Ceratocephala
    • †Ceratocephala graffhami
  • †Ceratonurus
  • †Ceratopea
  • †Ceraurinella
  • Fossil of the Middle-Late Ordovician trilobite Ceraurus
    †Ceraurus
    • †Ceraurus ruidus
  • †Cerithioides – tentative report
    • †Cerithioides gleanensis
  • †Chaenocardia
    • †Chaenocardia ovata
  • †Chaetetes
    • †Chaetetes milleporaceus – or unidentified comparable form
  • †Chaloneria
  • †Champlainopora
    • †Champlainopora chazyensis
  • †Chapmania
    • †Chapmania carterensis
    • †Chapmania oklahomensis
    • †Chapmania taylori
  • †Chaulistomella
    • †Chaulistomella crassa
    • †Chaulistomella magna
    • †Chaulistomella mira
    • †Chaulistomella mundula
    • †Chaulistomella nitens
    • †Chaulistomella obesa
  • †Cheirocrinus
  • †Cheirocystis
    • †Cheirocystis ardmorensis
  • Fossil of the Cambrian-Middle Devonian trilobite Cheirurus
    †Cheirurus
    • †Cheirurus infensus
    • †Cheirurus phollikodes – type locality for species
  • †Chilotrypa
    • †Chilotrypa distans – type locality for species
  • †Chlidochirus
  • †Choctawites
    • †Choctawites choctawensis
  • †Chonetes
    • †Chonetes decipiens
    • †Chonetes euampygus
    • †Chonetes kingi – type locality for species
    • †Chonetes mesoloba
  • †Chonetinella
    • †Chonetinella flemingi – or unidentified comparable form
  • †Cibecuia
    • †Cibecuia gouldii
  • †Cibolocrinus
    • †Cibolocrinus bellus – type locality for species
    • †Cibolocrinus circulus – type locality for species
    • †Cibolocrinus spinosus – type locality for species
    • †Cibolocrinus tumidus
  • †Cirratriradites
    • †Cirratriradites annulatus
    • †Cirratriradites annuliformis
    • †Cirratriradites maculatus
    • †Cirratriradites saturnii
  • Fossil of the Carboniferous tabulate coral Cladochonus
    †Cladochonus
  • †Claritacarpus – type locality for genus
    • †Claritacarpus smithi – type locality for species
  • †Clarkeolepis – type locality for genus
    • †Clarkeolepis clarkei – type locality for species
    • †Clarkeolepis elegans – type locality for species
  • †Clathrocrinus
    • †Clathrocrinus grileyi – type locality for species
  • †Clavasporites – type locality for genus
    • †Clavasporites irregularis – type locality for species
  • †Clavatasporites
    • †Clavatasporites irregularis
  • †Cleiocrinus
    • †Cleiocrinus bromidensis – type locality for species
    • †Cleiocrinus regius
  • Fossilized shell of the Middle Devonian-Permian brachiopod Cleiothyridina
    †Cleiothyridina
    • †Cleiothyridina glenparkensis – or unidentified comparable form
    • †Cleiothyridina orbicularis
  • †Cleithronetrum
    • †Cleithronetrum cancellatum
  • †Cleithyridina
    • †Cleithyridina orbicularis
  • †Clepsydrops
  • †Climacammina
  • Cliona
    • †Cliona fenestralis – type locality for species
    • †Cliona paleodendrica – type locality for species
    • †Cliona stellata – type locality for species
  • †Clionolithes
    • †Clionolithes radicans – or unidentified comparable form
  • †Coelochilina
    • †Coelochilina alata
  • †Coelospira
    • †Coelospira concava
    • †Coelospira saffordi
    • †Coelospira virginia
  • †Colaptomena
    • †Colaptomena bella
  • †Coledium
    • †Coledium simulans
  • Illustration of a fossilized cranium of the Permian primitive reptile Colobomycter
    †Colobomycter – type locality for genus
    • †Colobomycter pholeter – type locality for species
    • †Colobomycter vaughni – type locality for species
  • †Colpodecrinus
  • †Complexisporites
    • †Complexisporites polymorphus
  • †Composita
    • †Composita mexicana
    • †Composita rotunda
    • †Composita subcircularis
    • †Composita subtilita
    • †Composita wasatchensis
  • Concavisporites
  • †Concavissimisporites
  • †Condracypris
    • †Condracypris binoda
    • †Condracypris coalensis – type locality for species
    • †Condracypris parallela
    • †Condracypris simplex
  • †Condranema
    • †Condranema magna – or unidentified comparable form
  • †Conularia
    • †Conularia crustula – or unidentified comparable form
  • †Coolinia
    • †Coolinia reedsi
  • †Cordania
    • †Cordania falcata
    • †Cordania wessmani
  • †Cordylodus
  • †Cornigella
    • †Cornigella pushmatahensis – type locality for species
  • †Cornulites
    • †Cornulites inelegans
  • Cornuspira
    • †Cornuspira semiconstrictus
  • Mounted fossilized skeleton of the Permian synapsid (mammal precursor) Cotylorhynchus
    †Cotylorhynchus – type locality for genus
    • †Cotylorhynchus bransoni – type locality for species
    • †Cotylorhynchus romeri – type locality for species
  • †Cranaena
    • †Cranaena globosa
    • †Cranaena salinensis – type locality for species
  • Crania
    • †Crania minuta – type locality for species
  • †Craniops
    • †Craniops tenuis
  • †Crassispora
    • †Crassispora kosankei
  • †Cravenoceras
  • †Cremacrinus
  • †Cricotillus
    • †Cricotillus brachydens
  • Illustration of a fossilized skull and ventral scutes of the Carboniferous-Permian reptile relative Cricotus. Edward Drinker Cope (1884).
    †Cricotus
    • †Cricotus crassidiscus
  • †Crinerocrinus
  • †Crinisarina
    • †Crinisarina prouti
  • †Crinoedischia
    • †Crinoedischia noblensis – type locality for species
  • †Cromyocrinus
    • †Cromyocrinus grandis
  • †Crossotelos – type locality for genus
    • †Crossotelos annulatus – type locality for species
  • †Crurithyris
    • †Crurithyris planoconvexa
  • †Cruruthyris
    • †Cruruthyris planoconvexa
  • †Crustaesporites
    • †Crustaesporites globulus – tentative report
  • †Cryptophyllus
    • †Cryptophyllus gibbosum
    • †Cryptophyllus nuculopsis
    • †Cryptophyllus simpsoni
  • †Cryptothyrella – tentative report
    • †Cryptothyrella ovoides
  • Fossil of the Carboniferous shark Ctenacanthus
    †Ctenacanthus – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Ctenobolbina
    • †Ctenobolbina abrupta
    • †Ctenobolbina bispinata
    • †Ctenobolbina cancellata
    • †Ctenobolbina inflata
    • †Ctenobolbina parva
    • †Ctenobolbina percarinata
    • †Ctenobolbina varicata
  • †Cullisonia
    • †Cullisonia producta
  • †Curtognathus
    • †Curtognathus cordiformis
    • †Curtognathus coronata
    • †Curtognathus limitaris
  • †Cyathocystis
    • †Cyathocystis oklahomae
  • †Cybeloides
  • †Cybelopsis
  • †Cycadopites
  • †Cyclites
    • †Cyclites depressus – type locality for species
  • †Cyclobathmus
    • †Cyclobathmus haworthi – type locality for species
  • †Cycloceras
    • †Cycloceras meeki – type locality for species
    • †Cycloceras randolphensis
  • †Cyclocystoides
  • †Cyclogranisporites
    • †Cyclogranisporites aureus
    • †Cyclogranisporites leopoldi
    • †Cyclogranisporites microgranus
    • †Cyclogranisporites minutus
    • †Cyclogranisporites obliquus
    • †Cyclogranisporites orbicularis
  • †Cyclonema
  • †Cycloplectoceras
    • †Cycloplectoceras miseri
  • Fossilized foliage from the Carboniferous seed fern Cyclopteris
    †Cyclopteris
  • †Cyclopuncta – type locality for genus
    • †Cyclopuncta girtyi – type locality for species
  • †Cyclospira
    • †Cyclospira parva
  • †Cyclozyga
    • †Cyclozyga neotenica – type locality for species
  • †Cymatorhiza – type locality for genus
    • †Cymatorhiza kittsi – type locality for species
  • †Cymatospira
    • †Cymatospira montfortianus
  • Fossil of the Late Ordovician-Late Devonian trilobite Cyphaspis
    †Cyphaspis
    • †Cyphaspis carrolli
  • †Cyphoneurodes
    • †Cyphoneurodes patriciae – type locality for species
  • †Cypricardella – tentative report
    • †Cypricardella enigmatica – type locality for species
  • †Cyrtina
    • †Cyrtina dalmani
  • †Cyrtograptus
  • †Cyrtorizoceras
  • †Cystiphyllum
  • †Cystodictya
    • †Cystodictya elegans – type locality for species

D
  • †Dactylogonia
    • †Dactylogonia sculpturata
    • †Dactylogonia subaequicostellata
  • †Dalejina
    • †Dalejina henryhousensis
    • †Dalejina subtriangularis
  • †Dalmanella
    • †Dalmanella edgewoodensis
  • Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites
    †Dalmanites
    • †Dalmanites ptyktorhion
    • †Dalmanites rutellum
  • †Dapsilodus
    • †Dapsilodus obliquicostatus
    • †Dapsilodus praecipuus
    • †Dapsilodus sparsus
  • †Decoriconus
    • †Decoriconus fragilis
  • †Decoroproetus
    • †Decoroproetus anaglyptus
    • †Decoroproetus corycoeus
  • †Dekayella
    • †Dekayella praenuntia
  • †Delocrinus
    • †Delocrinus densus
    • †Delocrinus hemisphericus
    • †Delocrinus pentanodus – type locality for species
  • †Deloia
    • †Deloia sulcata
  • †Delopsocus
    • †Delopsocus elongatus
  • †Delopterum
    • †Delopterum latum
    • †Delopterum minutum
  • Interpretive diagrams and fossils of a skull of the Permian primitive reptile Delorhynchus
    †Delorhynchus – type locality for genus
    • †Delorhynchus cifellii – type locality for species
    • †Delorhynchus priscus – type locality for species
  • †Delotaxis
  • †Delthyris
    • †Delthyris kozlowskii
  • †Deltoidospora
    • †Deltoidospora adnata
    • †Deltoidospora grandis
    • †Deltoidospora levis
    • †Deltoidospora priddyi
    • †Deltoidospora sphaerotriangula
    • †Deltoidospora subadnatoides
  • †Dendrocrinus
    • †Dendrocrinus latibranchiatus – or unidentified comparable form
    • †Dendrocrinus rusticus
  • †Densosporites
    • †Densosporites sphaerotriangularis
  • †Derbyia
    • †Derbyia crassa – or unidentified comparable form
  • †Derbyoides – or unidentified related form
  • †Desmoinesia
    • †Desmoinesia muricatina
  • †Desmorthis
  • †Diabolocrinus
  • †Diacalymene
    • †Diacalymene clavicula
  • Fossilized skeleton of the Permian reptile relative Diadectes
    †Diadectes
    • †Diadectes zenos
  • †Dianulites
    • †Dianulites fastigiatus
    • †Dianulites petropolitana
  • †Diaphoroceras
  • †Diaphorodendron
    • †Diaphorodendron dicentricum
    • †Diaphorodendron scleroticum
  • †Diaphragmus
    • †Diaphragmus fasciculatus
  • †Dibunophyllum
    • †Dibunophyllum hansoni – type locality for species
  • †Dicamaropsis
    • †Dicamaropsis parva
  • †Dicellograptus
    • †Dicellograptus gurleyi
    • †Dicellograptus mensurans
  • †Diceromyonia
    • †Diceromyonia tersa – or unidentified comparable form
  • †Dichentomum
    • †Dichentomum tinctum
  • †Dichognathus
    • †Dichognathus extensa
    • †Dichognathus typica
  • †Dicoelosia
    • †Dicoelosia oklahomenesis – type locality for species
    • †Dicoelosia oklahomensis
    • †Dicoelosia varica
  • †Dicranella
    • †Dicranella fragilis
    • †Dicranella macrocarinata
  • Dicranurus
    †Dicranurus
    • †Dicranurus elegantus
    • †Dicranurus hamatus
  • †Dicromyocrinus
    • †Dicromyocrinus medius – type locality for species
    • †Dicromyocrinus optimus
    • †Dicromyocrinus subaplatus – type locality for species
  • †Dictybolos – type locality for genus
    • †Dictybolos tener – type locality for species
  • †Dictyoclostus
    • †Dictyoclostus ingrata – or unidentified related form
    • †Dictyoclostus mesialis
  • †Dictyonella
    • †Dictyonella gibbosa
  • †Dictyonema
    • †Dictyonema francesiae
    • †Dictyonema rockcrossingensis
  • †Dictyospongia
  • †Dielasma
    • †Dielasma oklahomensis – type locality for species
  • †Dierespongia – type locality for genus
    • †Dierespongia palla – type locality for species
  • †Dimeropygiella
  • Life restoration of the Permian synapsid (mammal precursor) Dimetrodon
    †Dimetrodon
    • †Dimetrodon dollovianus
    • †Dimetrodon limbatus – or unidentified comparable form
    • †Dimetrodon loomisi
    • †Dimetrodon macrospondylus
  • †Diphuicrinus
    • †Diphuicrinus croneisi
    • †Diphuicrinus dovelyensis
    • †Diphuicrinus faustus – type locality for species
    • †Diphuicrinus mammifer – type locality for species
    • †Diphuicrinus pentanodus – type locality for species
  • Fossilized axial skeleton of the Carboniferous-Permian amphibian Diplocaulus
    †Diplocaulus – type locality for genus
    • †Diplocaulus magnicornis
    • †Diplocaulus parvus – type locality for species
    • †Diplocaulus primus – type locality for species
  • †Diplograptus
    • †Diplograptus maxwelli
  • †Diplothmema
    • †Diplothmema pachyderma
  • †Diplotrypa
    • †Diplotrypa bassleri
  • †Discitoceras
  • †Disparifusa
    • †Disparifusa hystricosa
  • †Distacodus
    • †Distacodus oklahomensis – type locality for species
  • †Ditaxineura
    • †Ditaxineura cellulosa
  • †Ditoecholasma
  • †Ditomopyge
    • †Ditomopyge parvulus – or unidentified comparable form
  • †Dizygopleura
  • †Doleotheca
  • †Doleroides
    • †Doleroides compressus
    • †Doleroides oklahomensis
    • †Doleroides vescus
  • †Dolerophyllum – tentative report
  • †Dolerorthis
    • †Dolerorthis hami
    • †Dolerorthis nanella
    • †Dolerorthis savagei
  • †Doleserpeton – type locality for genus
    • †Doleserpeton annectens – type locality for species
  • †Dolichoharpes
    • †Dolichoharpes reticulata
  • †Doliocrinus
  • †Domatoceras
    • †Domatoceras collinsvillense – type locality for species
    • †Domatoceras williamsi
  • †Donaldina
    • †Donaldina attenuata
    • †Donaldina grantonensis
  • †Donezella
  • †Donovaniconus
    • †Donovaniconus oklahomensis – type locality for species
  • †Drepanoistodus
    • †Drepanoistodus suberectus
  • †Dudleyaspis
  • †Dunbarites
    • †Dunbarites rectilateralis
    • †Dunbarites wewokensis – type locality for species
  • †Duncanella

E
  • †Earlandinita
  • †Eatonia
    • †Eatonia exserta
  • †Ecculiomphalus – tentative report
  • †Echinaria
  • †Echinoconchus
    • †Echinoconchus elegans
  • †Echinocrinus
    • †Echinocrinus cratis – or unidentified related form
  • †Echinoencrinites – tentative report
    • †Echinoencrinites ornatus
  • †Echinoprimitia
    • †Echinoprimitia imputata
  • Fossil of the Early-Middle Ordovician cystoid echinoderm Echinosphaerites
    †Echinosphaerites
    • †Echinosphaerites aurantium
  • †Economolopsis
    • †Economolopsis anodontoides
  • †Ectenaspis
    • †Ectenaspis burkhalteri – type locality for species
  • †Ectenocrinus
  • †Ectenoglossa – tentative report
    • †Ectenoglossa sculpta
  • †Ectosteorhachis
    • †Ectosteorhachis nitidus – or unidentified comparable form
  • Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Edaphosaurus
    †Edaphosaurus
    • †Edaphosaurus cruciger
  • †Edestus – type locality for genus
    • †Edestus vorax – type locality for species
  • †Edmondia
    • †Edmondia rotunda – type locality for species
    • †Edmondia senilis – or unidentified comparable form
    • †Edmondia splendens – type locality for species
  • †Edriocrinus
  • †Edriophus
  • †Ehlersia
  • †Elibatocrinus
    • †Elibatocrinus elongatus – or unidentified comparable form
  • †Elmoa
    • †Elmoa trisecta
  • †Elpidocrinus
    • †Elpidocrinus tuberosus
  • †Embolaster – type locality for genus
    • †Embolaster graffhami – type locality for species
  • †Emilites
    • †Emilites bennisoni – type locality for species
  • †Enchostoma – tentative report
    • †Enchostoma bicarinatum – or unidentified comparable form
  • †Endelocrinus
    • †Endelocrinus matheri
  • †Endosporites
    • †Endosporites globiformis
    • †Endosporites plicatus
    • †Endosporites zonalis
  • †Endothyra
    • †Endothyra bowmani
  • †Endothyranella
  • †Enteletes
  • †Entelophyllum
  • †Enterolasma
  • †Eoasianites
  • †Eochiton
    • †Eochiton arbucklensis – type locality for species
  • †Eochonetes
    • †Eochonetes magna
  • †Eodictyonella
  • †Eohippioceras
    • †Eohippioceras ferratum
  • †Eohollina
    • †Eohollina depressa
    • †Eohollina papillata
  • †Eoleperditia
    • †Eoleperditia fabulites
    • †Eoleperditia inflativentralis
  • †Eolissochonetes
  • †Eomartiniopsis
    • †Eomartiniopsis rostrata
  • †Eomonorachus
    • †Eomonorachus divaricatus
  • †Eopinnacrinus
  • †Eopleurophorus – type locality for genus
    • †Eopleurophorus immaturus
    • †Eopleurophorus spinulosa – or unidentified comparable form
  • †Eoprimitia
    • †Eoprimitia bailyana
    • †Eoprimitia cooperi
    • †Eoprimitia quadrata
    • †Eoprimitia subnodosa
  • †Eorobergia
    • †Eorobergia marginalis – or unidentified comparable form
  • †Eoschistoceras
    • †Eoschistoceras strawnense
  • †Eospirifer
    • †Eospirifer acutolineatus
  • †Eotomaria
  • †Ephedripites
    • †Ephedripites corrugatus – type locality for species
  • †Epiphyton
  • †Equisetites
  • †Equisetosporites
  • †Eridoconcha
    • †Eridoconcha magna
    • †Eridoconcha simpsoni
  • †Eridopora
    • †Eridopora radiata
    • †Eridopora stellata
  • †Eridotrypa
    • †Eridotrypa abrupta
  • †Erismodus – tentative report
  • †Erisocrinus
    • †Erisocrinus wapanucka
  • Life restoration of the Carboniferous-Permian amphibian Eryops
    †Eryops
    • †Eryops megacephalus
  • †Escharopora
    • †Escharopora recta
  • †Estheria
  • †Ethelocrinus – tentative report
    • †Ethelocrinus kirki
  • Fossilized holdfast of the Silurian-Middle Devonian crinoid ("sea lily") Eucalyptocrinites
    †Eucalyptocrinites
    • †Eucalyptocrinites pernodosus
  • †Euchondria
    • †Euchondria subquadrata – type locality for species
  • †Eucraterellina
    • †Eucraterellina oblonga
    • †Eucraterellina randolphi
    • †Eucraterellina spitznasi
  • †Eucystis
  • †Eudissoceras – type locality for genus
    • †Eudissoceras collinsvillense – type locality for species
  • †Eukloedenella
  • †Eumartynovia – type locality for genus
    • †Eumartynovia raaschi – type locality for species
  • †Eumetria
    • †Eumetria deltoides – type locality for species
    • †Eumetria matheri – type locality for species
    • †Eumetria vera
    • †Eumetria verneuiliana
  • †Eumorphoceras
    • †Eumorphoceras bisulcatum
    • †Eumorphoceras girtyi
  • †Eumorphocystis
    • †Eumorphocystis multiporata
  • †Euonychocrinus
  • †Eupachycrinus
    • †Eupachycrinus magister – or unidentified comparable form
    • †Eupachycrinus verrucosus
  • †Euphemites
    • †Euphemites carbonarius
    • †Euphemites compressus – type locality for species
  • †Eurychilina
    • †Eurychilina papillata
    • †Eurychilina subradiata
    • †Eurychilina ventrosa
  • †Eurygonum
    • †Eurygonum nodosum
  • †Euryodus
    • †Euryodus dalyae – type locality for species
    • †Euryodus primus – or unidentified comparable form
  • †Eusphenopteris
    • †Eusphenopteris scribanii-striata – informal
  • †Euspirocrinus
    • †Euspirocrinus cirratus
  • †Exocrinus
  • †Exoriocrinus

F
  • †Failleana
    • †Failleana limbata – or unidentified comparable form
  • †Falcisporites
    • †Falcisporites zapfei
  • †Fardenia
    • †Fardenia attenuata
    • †Fardenia reedsi
  • †Fascichnus
    • †Fascichnus dactylus
    • †Fascichnus frutex
  • †Fascifera
    • †Fascifera dalmanelloidea
  • †Fastigatisporites
    • †Fastigatisporites physema – type locality for species
  • †Favosites
  • †Fayella – type locality for genus
    • †Fayella chickashaensis – type locality for species
  • Fossilized skull in multiple views of the Permian primitive reptile Feeserpeton
    †Feeserpeton – type locality for genus
    • †Feeserpeton oklahomensis – type locality for species
  • †Fenestella
    • †Fenestella ardmorensis
    • †Fenestella bendensis – type locality for species
    • †Fenestella cestriensis
    • †Fenestella chesterensis – or unidentified comparable form
    • †Fenestella cumingsi
    • †Fenestella exigua
    • †Fenestella frutex – or unidentified comparable form
    • †Fenestella granularis – type locality for species
    • †Fenestella kosomensis – type locality for species
    • †Fenestella morrowensis
    • †Fenestella oklahomensis – type locality for species
    • †Fenestella ovatipora – type locality for species
    • †Fenestella paradisensis
    • †Fenestella rara – type locality for species
    • †Fenestella serratula
  • †Fenesteverta – type locality for genus
    • †Fenesteverta nicklesi – type locality for species
  • †Fernglenia
    • †Fernglenia vernonensis
  • †Finkelnburgia
    • †Finkelnburgia crassicostata
  • †Fistulipora
  • †Flexifenestella
    • †Flexifenestella grandis – type locality for species
  • †Florinites
    • †Florinites mediapudens
    • †Florinites millotti
    • †Florinites similis
    • †Florinites visendus
    • †Florinites volans
  • †Foerstediscus
  • †Foerstia
    • †Foerstia ohioensis
  • †Fragiscutellum
    • †Fragiscutellum glebalis
  • †Fragiscutum
  • Fossil in an enrolled posture of the Late Ordovician trilobite Frencrinuroides
    †Frencrinuroides
    • †Frencrinuroides capitonis
  • †Fusulina

G
  • †Galateacrinus
  • †Gardenasporites
    • †Gardenasporites heisselii
  • †Garwoodia
  • †Gastrioceras
    • †Gastrioceras adaense
    • †Gastrioceras fittsi
    • †Gastrioceras prone – type locality for species
    • †Gastrioceras retiferum – type locality for species
  • †Gazacrinus
    • †Gazacrinus stellatus
  • †Gelasinocephalus
    • †Gelasinocephalus pustulosus
    • †Gelasinocephalus whittingtoni
  • †Geniculifera
    • †Geniculifera siphuncula – type locality for species
  • †Gigagramma – type locality for genus
    • †Gigagramma carpenteri – type locality for species
  • †Gigantopteris
    • †Gigantopteris americana
  • †Girtycoelia
  • †Girtyella
  • †Girtyspira
    • †Girtyspira alvaensis – type locality for species
  • †Girvanella
  • †Gissocrinus
    • †Gissocrinus quadratus
  • †Glabovalvulina – tentative report
  • †Glabrocingulum
    • †Glabrocingulum grayvillense
    • †Glabrocingulum stellaeformis
    • †Glabrocingulum wannense – type locality for species
  • †Glaphurochiton
  • †Glaphyrites
    • †Glaphyrites angulatus
    • †Glaphyrites excelsus – type locality for species
    • †Glaphyrites hyattianus
    • †Glaphyrites subdiscus
    • †Glaphyrites warei – type locality for species
  • †Glaphyrophlebia
    • †Glaphyrophlebia anderhalterorum – type locality for species
  • †Glaukosocrinus
  • †Globivalvulina
  • †Globovalvulina
  • †Globulocystites
    • †Globulocystites cristatus
    • †Globulocystites infundus
  • †Glosella
    • †Glosella liumbona
  • †Gloverilima
    • †Gloverilima pratti
  • †Glymmatobolbina
    • †Glymmatobolbina quadrata
  • †Glyprorthis
    • †Glyprorthis costellata
  • †Glyptocystella
    • †Glyptocystella loeblichae
  • †Glyptocystites
    • †Glyptocystites forbesi
    • †Glyptocystites loeblichae
    • †Glyptocystites logani
    • †Glyptocystites multiporus
    • †Glyptocystites regnelli – or unidentified comparable form
  • †Glyptopleura
    • †Glyptopleura geisi – type locality for species
    • †Glyptopleura scotti – type locality for species
    • †Glyptopleura warthini – type locality for species
  • †Glyptorthis
    • †Glyptorthis crenulata – type locality for species
    • †Glyptorthis glaseri
    • †Glyptorthis obesa – type locality for species
    • †Glyptorthis uncinata – type locality for species
  • †Gnathodus
  • Life restoration of the Permian lungfish Gnathorhiza
    †Gnathorhiza
    • †Gnathorhiza serrata
  • †Gnetalesaccus
    • †Gnetalesaccus variabilis
  • †Gnorimocrinus
    • †Gnorimocrinus pontotocensis
  • †Goniasma
  • Fossilized shell of the Late Devonian-Late Triassic ammonoid cephalopod Goniatites
    †Goniatites
    • †Goniatites multiliratus – type locality for species
  • †Gonioglyphioceras
    • †Gonioglyphioceras gracile
  • †Gonioloboceratoides
  • †Goniophora
  • †Gorgonisphaeridium
    • †Gorgonisphaeridium antiquum
  • †Gotlandochiton
    • †Gotlandochiton hami – type locality for species
  • †Graffhamicrinus
    • †Graffhamicrinus antiquus
  • †Grammolomatella
  • †Granasporites
    • †Granasporites medius
  • †Grandfieldia – type locality for genus
    • †Grandfieldia callilepidota – type locality for species
  • †Granulatisporites
    • †Granulatisporites granularis
    • †Granulatisporites granulatus
    • †Granulatisporites microgranifer
    • †Granulatisporites minutus
    • †Granulatisporites verrucosus
  • †Graptodictya
    • †Graptodictya elegantula
  • †Griffithidella
    • †Griffithidella alternata
    • †Griffithidella doris
  • †Gryphellina
    • †Gryphellina sellardsi – type locality for species
  • †Grypocrinus
  • †Gyalorhethium
    • †Gyalorhethium chondrodes
  • Fossils of the Carboniferous coral Gymnophyllum, also known as button coral
    †Gymnophyllum
    • †Gymnophyllum wardi
  • †Gypidula
    • †Gypidula multicostata
  • †Gyronema

H
  • †Hagnocrinus
  • †Halliella
    • †Halliella labiosa
  • Fossil of the Ordovician bryozoan ("moss animal") Hallopora
    †Hallopora
    • †Hallopora dubia
    • †Hallopora macrostoma
    • †Hallopora multitabulata
    • †Hallopora pachymura
  • †Halysites
  • †Hamiapollenites – type locality for genus
    • †Hamiapollenites karrooensis
    • †Hamiapollenites saccatus – type locality for species
    • †Hamiapollenites tractiferinus
  • †Haplistion
    • †Haplistion apletum – type locality for species
  • †Hapsidopareion – type locality for genus
    • †Hapsidopareion lepton – type locality for species
  • †Harpidella
    • †Harpidella butorus
  • †Harpillaenus
  • †Healdia
    • †Healdia caneyensis
    • †Healdia compressa
    • †Healdia harltoni – type locality for species
    • †Healdia simplicissima – type locality for species
  • †Hebetorthoceras
    • †Hebetorthoceras brokenarrowense
  • †Heliolites
  • †Heliosocrinus
    • †Heliosocrinus neotosus – type locality for species
  • †Helminthochiton
    • †Helminthochiton riddlei
  • †Hemiliroceras
    • †Hemiliroceras reticulatum – type locality for species
  • †Hemiphragma
    • †Hemiphragma irrasum
    • †Hemiphragma pulchra
  • †Hesperocystis
    • †Hesperocystis deckeri
  • †Hesperorthis
    • †Hesperorthis crinerensis
    • †Hesperorthis rowlandi
    • †Hesperorthis sulcata
  • †Heterangium
  • †Heteropecten
    • †Heteropecten vanvleeti – type locality for species
  • †Heterotrypa
    • †Heterotrypa taffi
  • †Hexacrinites
    • †Hexacrinites adaensis
    • †Hexacrinites carinatus
  • †Hibbertia
  • †Hindia
  • †Hindiodella
  • †Hippocrepina
    • †Hippocrepina bendensis
  • †Hiscobeccus
    • †Hiscobeccus capax
  • †Hoffmeisterites – type locality for genus
    • †Hoffmeisterites microdens – type locality for species
  • †Holcospermum
  • †Hollinella
    • †Hollinella burlingamensis
    • †Hollinella radiata
  • †Holmesella
    • †Holmesella triangularis – type locality for species
    • †Holmesella wapanuckensis – type locality for species
  • Fossilized shells of the Ordovician-Carboniferous sea snail Holopea
    †Holopea – tentative report
  • †Homocladus
    • †Homocladus grandis
  • †Homoeospira
    • †Homoeospira costatula
    • †Homoeospira foerstei
    • †Homoeospira subgibbosa
  • †Homotrypa
    • †Homotrypa callitoecha
    • †Homotrypa dickeyvillensis
    • †Homotrypa multitabulata
    • †Homotrypa sagittata
    • †Homotrypa tuberculata
    • †Homotrypa ulrichi
  • †Hormotoma
  • †Howellella
    • †Howellella cycloptera
    • †Howellella henryhousensis
    • †Howellella splendens
  • †Hudsonaster
  • †Huntonella – type locality for genus
    • †Huntonella unicornis – type locality for species
  • Fossil of the Early Devonian trilobite Huntoniatonia
    †Huntoniatonia
    • †Huntoniatonia huntonensis
    • †Huntoniatonia lingulifer
    • †Huntoniatonia oklahomae
    • †Huntoniatonia purduei
  • †Hustedia
    • †Hustedia mormoni – or unidentified comparable form
  • †Hybocrinus
    • †Hybocrinus conicus
    • †Hybocrinus crinerensis
    • †Hybocrinus nitidus
    • †Hybocrinus pyxidatus
  • †Hydreionocrinus
    • †Hydreionocrinus patulus
  • Hyperammina
    • †Hyperammina elongata
    • †Hyperammina johnsvalleyensis – type locality for species
    • †Hyperammina rugosa
  • †Hyperamminoides
    • †Hyperamminoides glabra
  • †Hyperchilarina
    • †Hyperchilarina nodosimarginata
  • †Hypergonia
    • †Hypergonia quadricarinata – or unidentified comparable form
    • †Hypergonia tatei – or unidentified related form

I
  • †Ianthinopsis
  • †Icthyocrinus
    • †Icthyocrinus corbis
  • †Idiognathodus
    • †Idiognathodus delicates
    • †Idiognathodus sinuatus
  • Fossil of the Middle Ordovician trilobite Illaenus
    †Illaenus
    • †Illaenus utahensis – or unidentified comparable form
  • †Illenites
    • †Illenites delasaucei
    • †Illenites parvus
  • †Inflatia
    • †Inflatia cherokeensis
    • †Inflatia clydensis
    • †Inflatia cooperi
    • †Inflatia gracilis
    • †Inflatia inflata
    • †Inflatia pusilla
    • †Inflatia succincta – type locality for species
  • †Ischyrotoma
    • †Ischyrotoma sila
  • †Isoallagecrinus
    • †Isoallagecrinus barnettensis – type locality for species
  • †Isochilina
    • †Isochilina bulbosa
  • †Isorthis
    • †Isorthis arcuaria
    • †Isorthis pygmaea
  • †Isoteloides
    • †Isoteloides peri
  • Fossil of the Middle-Late Ordovician giant trilobite Isotelus.
    †Isotelus
    • †Isotelus bradleyi – type locality for species
    • †Isotelus violaensis – type locality for species
  • †Ivanovia – tentative report
  • †Ivoechiton
    • †Ivoechiton calathicolus – type locality for species
    • †Ivoechiton oklahomensis – type locality for species

J
  • †Janusella
    • †Janusella biceratina
  • †Jeffersonia
    • †Jeffersonia granosa
    • †Jeffersonia jenni
    • †Jeffersonia ulrichi
  • †Jonesina
    • †Jonesina spinigera – or unidentified comparable form
  • †Jonesites
    • †Jonesites circa
    • †Jonesites huntonensis – type locality for species
  • †Juresania

K
  • Fossils of the Early Devonian trilobite Kainops
    †Kainops
    • †Kainops invius
    • †Kainops raymondi
  • †Kallimorphocrinus
    • †Kallimorphocrinus eaglei – type locality for species
  • †Kawina
  • †Kayina
    • †Kayina hybosa
    • †Kayina porosa
  • †Kennedya
    • †Kennedya fraseri – type locality for species
    • †Kennedya mirabilis
  • †Keokukia
    • †Keokukia sulcata
  • †Kettneraspis
    • †Kettneraspis williamsi
  • †Kirkbya
    • †Kirkbya bendensis – type locality for species
    • †Kirkbya moorei
    • †Kirkbya symmetrica
  • †Kirkbyella
    • †Kirkbyella obliqua
  • †Kirkidium
  • †Kirkocystis – type locality for genus
    • †Kirkocystis papillata – type locality for species
  • †Kitakamithyris
    • †Kitakamithyris cooperensis
  • †Klausipollenites
    • †Klausipollenites aequus
    • †Klausipollenites schaubergeri
  • †Knightites
    • †Knightites montfortianum
  • †Knightoceras
    • †Knightoceras patulum
  • †Kockelella
    • †Kockelella amsdeni
    • †Kockelella crassa
    • †Kockelella ortus
    • †Kockelella patula
    • †Kockelella ranuliformis
    • †Kockelella stauros
    • †Kockelella variabilis
    • †Kockelella walliseri
  • †Kosovopeltis
  • †Kozlowskia
    • †Kozlowskia splendens
  • †Kozlowskiellina
    • †Kozlowskiellina vaningeni
  • †Krausella
    • †Krausella arcuata
  • †Krotovia
  • †Kukalova – type locality for genus
    • †Kukalova americana – type locality for species

L
  • †Labidosaurikos – type locality for genus
    • †Labidosaurikos meachami – type locality for species
  • Life restoration of the Permian reptile Labidosaurus
    †Labidosaurus
  • †Labiisporites
    • †Labiisporites granulatus
  • †Laeviatosporites
    • †Laeviatosporites ovalis
  • Laevidentalium
    • †Laevidentalium venustum – or unidentified comparable form
  • †Laevigatosporites
    • †Laevigatosporites desmoinesensis
    • †Laevigatosporites globosus
    • †Laevigatosporites medius
    • †Laevigatosporites ovalis
    • †Laevigatosporites striatus
    • †Laevigatosporites vulgaris
  • †Lamellosathyris
    • †Lamellosathyris lamellosa
  • †Lampterocrinus
    • †Lampterocrinus fatigatus
  • †Lasanocrinus
    • †Lasanocrinus daileyi
    • †Lasanocrinus minutus – type locality for species
    • †Lasanocrinus multinodulus – type locality for species
    • †Lasanocrinus nodatus – type locality for species
    • †Lasanocrinus nodus – type locality for species
    • †Lasanocrinus strigosus
  • †Latosporites
    • †Latosporites minutus
  • †Leangella
    • †Leangella dissiticostella
  • †Lecanocrinus
    • †Lecanocrinus erectus
  • †Lecythiocrinus
    • †Lecythiocrinus asymmetricus – type locality for species
  • †Leioclema
    • †Leioclema dozierense
    • †Leioclema pushmatahensis – type locality for species
  • †Leiovalia
    • †Leiovalia scaberula
    • †Leiovalia teretis
  • †Lemmatophora
    • †Lemmatophora typa
  • Fossil of the Late Ordovician-Middle Devonian trilobite Leonaspis
    †Leonaspis
    • †Leonaspis williamsi
  • †Lepadocystites
    • †Lepadocystites moorei – tentative report
  • †Leperditella
    • †Leperditella aequilatera
    • †Leperditella altiforma
    • †Leperditella deckeri
    • †Leperditella incisa
    • †Leperditella jonesinoides
    • †Leperditella minima
    • †Leperditella porosa
    • †Leperditella rex
    • †Leperditella tumida
  • †Leperditia
  • †Lepidocoelus
  • †Lepidocyclus
    • †Lepidocyclus cooperi
    • †Lepidocyclus manniensis – tentative report
    • †Lepidocyclus oblongus
    • †Lepidocyclus perlamellosus
  • Life restoration of the Carboniferous tree-sized club moss relative Lepidodendron
    †Lepidodendron
    • †Lepidodendron hickii
  • †Lepidophloios
    • †Lepidophloios hallii/johnsonii
  • †Leptaena
    • †Leptaena acuticuspidata – type locality for species
    • †Leptaena oklahomensis – type locality for species
  • †Leptaenisca
    • †Leptaenisca concava
    • †Leptaenisca irregularis
  • †Leptagonia
    • †Leptagonia analoga
  • †Leptochirognathus
    • †Leptochirognathus extensa
  • †Leptodesma
    • †Leptodesma gouldii – type locality for species
    • †Leptodesma matheri – type locality for species
    • †Leptodesma stenzeli – type locality for species
  • †Leptoskelidion – tentative report
    • †Leptoskelidion septulosum
  • †Leptostrophia
    • †Leptostrophia beckii
  • †Levenea
    • †Levenea subcarinata
  • †Ligogramma – type locality for genus
    • †Ligogramma sinuosa – type locality for species
    • †Ligogramma wichita – type locality for species
  • †Limipecten
    • †Limipecten newelli – type locality for species
  • †Lindosroemella
    • †Lindosroemella patula – or unidentified comparable form
  • †Lindostoemella
    • †Lindostoemella patula – or unidentified comparable form
  • †Lindostroemella
    • †Lindostroemella patula – or unidentified comparable form
  • Lingula
    • †Lingula carbonaria – or unidentified comparable form
    • †Lingula eva
    • †Lingula paracletus – or unidentified comparable form
  • †Lingulasma
    • †Lingulasma oklahomense
  • Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella
    †Lingulella
    • †Lingulella galba
    • †Lingulella glypta
  • †Linoproductus
    • †Linoproductus delawarii – type locality for species
    • †Linoproductus ovatus
    • †Linoproductus prattenianus
  • †Liomolgocrinus
  • †Liomopterella
    • †Liomopterella pediaecetae – type locality for species
  • †Liomopterum
    • †Liomopterum ornatum
  • †Liospira
  • †Liroceras
    • †Liroceras liratum
  • †Lisca
    • †Lisca minuta
  • †Lissatrypa
    • †Lissatrypa clairensis
    • †Lissatrypa concentrica
    • †Lissatrypa decaturensis
    • †Lissatrypa henryhousensis
    • †Lissatrypa parvula
  • †Lissostrophia
    • †Lissostrophia cooperi
    • †Lissostrophia lindenensis
    • †Lissostrophia lindensis
  • Lithophaga
  • Lituotuba
  • Life restoration of the Permian amphibian Llistrofus
    †Llistrofus – type locality for genus
    • †Llistrofus pricei – type locality for species
  • †Lonchodomas
    • †Lonchodomas mcgeheei
  • †Lonchodus
  • †Lophamplexus
    • †Lophamplexus brevifolius – type locality for species
    • †Lophamplexus lutarius – type locality for species
    • †Lophamplexus spanius – type locality for species
    • †Lophamplexus vagus – type locality for species
  • †Lophophyllidium
    • †Lophophyllidium asarcum – type locality for species
    • †Lophophyllidium compressum – type locality for species
    • †Lophophyllidium hadrum
    • †Lophophyllidium profundum
    • †Lophophyllidium wewokanum – type locality for species
  • †Lophophyllum
  • †Lophospira
  • †Lophotichium
    • †Lophotichium amoenum
  • †Lophotriletes
    • †Lophotriletes commissuralis
    • †Lophotriletes ibrahimii
    • †Lophotriletes microsaetosus
    • †Lophotriletes pseudaculeatus
    • †Lophotriletes rarispinosus
  • †Lophpophyllum
    • †Lophpophyllum profundum – or unidentified comparable form
  • †Loxoedischia – type locality for genus
    • †Loxoedischia drewi – type locality for species
  • †Lueckisporites
    • †Lueckisporites fimbriatus
    • †Lueckisporites virkkiae
  • †Lunaferamita
    • †Lunaferamita bassleri
    • †Lunaferamita virginiensis
  • †Lundbladispora
  • †Lunulasporites – type locality for genus
    • †Lunulasporites vulgaris – type locality for species
  • †Lutesvillia
    • †Lutesvillia bispinosa
  • †Lycospora
    • †Lycospora granulata
    • †Lycospora micropapillata
    • †Lycospora pellucida
    • †Lycospora pusilla
    • †Lycospora rotuda
    • †Lycospora rotunda
  • †Lyroschizodus
    • †Lyroschizodus oklahomensis – type locality for species
  • Life restoration of the Permian snake-like amphibian Lysorophus showing speculative egg-coiling behavior
    †Lysorophus
    • †Lysorophus tricarinatus

M
  • †Maclurites
  • Life restoration of the Permian primitive reptile Macroleter
    †Macroleter
    • †Macroleter agilis – type locality for species
  • †Macropotamorhynchus
    • †Macropotamorhynchus tuta
  • †Macrostylocrinus
    • †Macrostylocrinus striatus
  • †Mandalocystis – type locality for genus
    • †Mandalocystis dockeryi – type locality for species
  • †Manespira
    • †Manespira costata
    • †Manespira elongata
    • †Manespira magnicostata
  • †Marginatia
    • †Marginatia magna
  • †Marginifera
  • †Marginovatia
    • †Marginovatia manardensis
    • †Marginovatia minor
    • †Marginovatia pumila
  • †Mariopteris
    • †Mariopteris nervosa
    • †Mariopteris occidentalis
  • †Marsupiocrinus
    • †Marsupiocrinus stellatus
  • †Marsupipollenites
    • †Marsupipollenites striatus
  • †Martynovia
    • †Martynovia halli – type locality for species
    • †Martynovia longipennis – type locality for species
  • †Mastigograptus
  • †Matonisporites
  • †Maurotarion
    • †Maurotarion axitiosum
  • †Maximites
    • †Maximites oklahomensis – type locality for species
  • †Mcqueenoceras
  • †Meekella
    • †Meekella striatocostata
  • †Meekopinna
  • †Meekopora
  • †Meekospira
    • †Meekospira choctawensis
    • †Meekospira peracuta
  • †Megactenopetalus
    • †Megactenopetalus kaibabanus
  • †Megaglossoceras
  • †Megakozlowskiella
    • †Megakozlowskiella velata
  • †Megaliocrinus
    • †Megaliocrinus aplatus
  • †Megamyonia
    • †Megamyonia mankini
  • †Meganeuropsis
    • †Meganeuropsis americana – type locality for species
  • †Merista
    • †Merista oklahomensis
  • Illustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod Meristella
    †Meristella
    • †Meristella atoka
  • †Meristina
    • †Meristina claritensis
    • †Meristina roemeri
  • †Mescalites
    • †Mescalites discoidalis
  • †Mesolobus
  • †Mesotrypa
    • †Mesotrypa angularis
    • †Mesotrypa favosa
    • †Mesotrypa tubulifera
  • †Mesoxylon
  • †Metachorus
    • †Metachorus striolatus – type locality for species
  • Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras
    †Metacoceras
    • †Metacoceras cornutum
    • †Metacoceras sinuosum
    • †Metacoceras vagans – type locality for species
  • †Metaconularia
  • †Metacromyocrinus
    • †Metacromyocrinus fundundus – type locality for species
    • †Metacromyocrinus papulosus
  • †Metutharocrinus
    • †Metutharocrinus cockei
    • †Metutharocrinus spinifer – type locality for species
    • †Metutharocrinus undulatus – type locality for species
  • †Michelinia
    • †Michelinia meekana
  • †Michelinoceras
    • †Michelinoceras directum
    • †Michelinoceras wapanuckense
  • Life restoration of the Permian amphibian Micraroter
    †Micraroter – type locality for genus
    • †Micraroter erythrogeios – type locality for species
  • †Microcaracrinus
    • †Microcaracrinus delicatus
  • †Microcoelodus
    • †Microcoelodus asymmetricus
    • †Microcoelodus inornatus
    • †Microcoelodus intermedius
    • †Microcoelodus minutidentatus
    • †Microcoelodus typus
  • †Microleter – type locality for genus
    • †Microleter mckinzieorum – type locality for species
  • †Microreticulatisporites
    • †Microreticulatisporites nobilis
    • †Microreticulatisporites sulcatus
  • †Microschmidtella
    • †Microschmidtella berdanae – type locality for species
    • †Microschmidtella hami – type locality for species
  • †Microspermopteris
    • †Microspermopteris aphyllum
  • †Micula – tentative report
  • †Midcopterum – type locality for genus
    • †Midcopterum evidens – type locality for species
  • †Mimella
    • †Mimella extensa
    • †Mimella subquadrata
  • †Misthodotes
    • †Misthodotes edmundsi – type locality for species
    • †Misthodotes ovalis
  • †Mitorthoceras
    • †Mitorthoceras crebriliratum – type locality for species
    • †Mitorthoceras perfilosum
  • †Modiolopsis – tentative report
  • Modiolus
  • †Monoceratella
    • †Monoceratella brevispinata
  • †Monoceratina
    • †Monoceratina ardmorensis
    • †Monoceratina ventralis
  • Fossils of the Early Devonian graptolite Monograptus
    †Monograptus
  • †Monticuliporella
    • †Monticuliporella croneisi
    • †Monticuliporella peculiaris
    • †Monticuliporella shideleri
  • †Mooreina
    • †Mooreina johnsvalleyensis – type locality for species
  • †Mooreisporites
    • †Mooreisporites inusitatus
  • †Mooreoceras
  • †Moorites
  • †Moravia
    • †Moravia grandis – type locality for species
  • †Moundocrinus
    • †Moundocrinus coalensis – type locality for species
  • †Mucrosaccus
    • †Mucrosaccus alatus – type locality for species
  • †Multicostella
    • †Multicostella convexa
    • †Multicostella sulcata
  • †Multidentodus – type locality for genus
    • †Multidentodus brevis – type locality for species
    • †Multidentodus gracilis – type locality for species
    • †Multidentodus irregularis – type locality for species
    • †Multidentodus johnsvalleyensis – type locality for species
    • †Multidentodus typicus – type locality for species
    • †Multidentodus wapanuckensis – type locality for species
  • †Murinella
    • †Murinella partita
  • †Murospora
    • †Murospora kosankei
  • †Myalina
    • †Myalina lepta
  • Life restoration of the Permian synapsid (mammal precursor) Mycterosaurus
    †Mycterosaurus – type locality for genus
    • †Mycterosaurus longiceps – type locality for species
  • †Myeinocystites
    • †Myeinocystites natus
  • †Myelodactylus

N
  • †Nanicrinus
    • †Nanicrinus papillatus
  • †Nannaroter – type locality for genus
    • †Nannaroter mckinziei – type locality for species
  • †Nannospondylus – type locality for genus
    • †Nannospondylus stewarti – type locality for species
  • †Naticonema
  • Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis
    †Naticopsis
    • †Naticopsis transversa – type locality for species
  • †Navispira
    • †Navispira saffordi
  • †Neoarchaeocrinus
    • †Neoarchaeocrinus necopinus
  • †Neochonetes
    • †Neochonetes granulifer
  • †Neodimorphoceras
    • †Neodimorphoceras oklahomae
  • †Neoglyphioceras
    • †Neoglyphioceras caneyanum – type locality for species
  • †Neoisorophusella
    • †Neoisorophusella whitesidei – type locality for species
  • †Neokoninckophyllum
    • †Neokoninckophyllum acolumnatum
    • †Neokoninckophyllum tushanense
  • †Neoraistrickia
  • †Neospirifer
    • †Neospirifer dunbari
  • †Neostrophia
    • †Neostrophia gregaria
  • †Neothlipsura
    • †Neothlipsura furca
  • Fronds of the Carboniferous seed fern Neuropteris
    †Neuropteris
    • †Neuropteris heterophylla
    • †Neuropteris macrophylla
    • †Neuropteris obliqua
    • †Neuropteris osmundae
    • †Neuropteris rarinervis
  • †Nicholsonella
    • †Nicholsonella acanthobscura
    • †Nicholsonella irregularis
    • †Nicholsonella laminata
    • †Nicholsonella moniliformis
  • †Nobloedischia – type locality for genus
    • †Nobloedischia rasnitsyni – type locality for species
  • †Nodosinella
    • †Nodosinella glennensis – type locality for species
  • †Nucleospira
    • †Nucleospira concentrica
    • †Nucleospira ventricosa
  • Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula
    Nucula
  • Nuculana
  • †Nuculavus
  • †Nuculopsis
    • †Nuculopsis girtyi
    • †Nuculopsis subventricosa
    • †Nuculopsis wewoka
    • †Nuculopsis wewokana
  • †Nudauris
    • †Nudauris reticulata
  • †Nuferella
    • †Nuferella rothi – type locality for species
  • †Nummicrinus
    • †Nummicrinus brevis
    • †Nummicrinus papilloseous
  • †Nummulostegina
    • †Nummulostegina ardmorensis – type locality for species
  • †Nuskoisporites
    • †Nuskoisporites renulatus – type locality for species

O
  • †Obturamentella – type locality for genus
    • †Obturamentella wadei
  • †Octonaria
  • Fossil of the Silurian-Devonian trilobite Odontochile
    †Odontochile
    • †Odontochile syncrama
    • †Odontochile taffi
  • †Odontopteris
    • †Odontopteris permiensis – or unidentified comparable form
  • †Oepikina
    • †Oepikina expatiata
    • †Oepikina extensa
    • †Oepikina formosa
    • †Oepikina gregaria
  • †Oinochoe
    • †Oinochoe coccymelum – type locality for species
  • †Oistodus
    • †Oistodus abundans
    • †Oistodus inclinatus
  • †Oklahomacrinus
    • †Oklahomacrinus frostae
  • †Oklahomacystis
    • †Oklahomacystis spissus
    • †Oklahomacystis tribrachiatus
  • †Oklahomasporites – type locality for genus
    • †Oklahomasporites majori – type locality for species
  • †Oligophyllum – or unidentified comparable form
  • †Oligotypus
    • †Oligotypus tillyardi
  • † Oliveria
  • †Oltulocrinus
  • †Omphalotrochus
    • †Omphalotrochus wolfcampensis
  • †Onniella – tentative report
  • †Onychoplecia
    • †Onychoplecia tenuis
  • †Onychotreta
    • †Onychotreta multiplicata
  • Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
    †Ophiacodon
    • †Ophiacodon major
    • †Ophiacodon mirus – or unidentified comparable form
    • †Ophiacodon uniformis
  • †Ophiletina
    • †Ophiletina bromidensis – type locality for species
  • †Opisthodontosaurus – type locality for genus
    • †Opisthodontosaurus carrolli – type locality for species
  • †Orbiculoidea
    • †Orbiculoidea eximia
  • †Orbignyella
    • †Orbignyella sublamellosa
  • †Orobias
    • †Orobias ciscoensis
  • †Oromycter – type locality for genus
    • †Oromycter dolesorum – type locality for species
  • †Orovenator – type locality for genus
    • †Orovenator mayorum – type locality for species
  • Life restoration of the Carboniferous-Permian freshwater shark Orthacanthus
    †Orthacanthus
    • †Orthacanthus compressus
  • †Orthoceras
  • †Orthograptus
    • †Orthograptus eucharis
  • †Orthonema
  • †Orthosphaeridium
    • †Orthosphaeridium vibrissiferum
  • †Orthostrophella
    • †Orthostrophella clairensis
  • †Orthostrophia
    • †Orthostrophia brownsportensis – or unidentified comparable form
    • †Orthostrophia strophomenoides
  • †Orthotetes
    • †Orthotetes kaskaskiensis
    • †Orthotetes springerensis – type locality for species
  • †Otarion
    • †Otarion axitosum – type locality for species
  • †Ottonosia
  • †Oulodus
    • †Oulodus siluricus
  • †Ovatia
    • †Ovatia laevicosta
  • †Oxoplecia
    • †Oxoplecia filosa
    • †Oxoplecia gouldi
  • †Oxyprora
    • †Oxyprora oklahomaense
    • †Oxyprora sayrei – type locality for species
  • †Ozarkodina
    • †Ozarkodina bohemica
    • †Ozarkodina confluens
    • †Ozarkodina crassa
    • †Ozarkodina sagitta

P
  • †Pachydictya
    • †Pachydictya bromidensis
    • †Pachydictya sheldonensis
  • †Pachydomella
    • †Pachydomella sohni – type locality for species
  • †Pachyglossella
    • †Pachyglossella biconvexa
  • †Pachylyroceras
    • †Pachylyroceras cloudi
  • Fossil of the trilobite Paciphacops
    †Paciphacops
    • †Paciphacops birdsongensis – or unidentified comparable form
    • †Paciphacops campbelli
    • †Paciphacops raymondi
  • †Paladin
    • †Paladin morrowensis
    • †Paladin mucronatus – tentative report
  • Palaeoaplysina – tentative report
  • †Palaeocapulus – tentative report
    • †Palaeocapulus acutirostre – or unidentified comparable form
  • †Palaeocrinus
    • †Palaeocrinus hudsoni
  • †Palaeocystites – tentative report
  • †Palaeolima
    • †Palaeolima inequicostata
  • †Palaeoneilo
  • †Palaeostylus
  • †Palaeotextularia
  • †Palaeozygopleura
    • †Palaeozygopleura parva – tentative report
  • †Palecocrinus – tentative report
  • †Paleochiton
    • †Paleochiton kindbladensis – type locality for species
  • †Paleohyperamum – type locality for genus
    • †Paleohyperamum pottsvillensis – type locality for species
  • †Paleotextularia
  • †Paleuthygramma
    • †Paleuthygramma acuta – type locality for species
  • †Paleyoldia
    • †Paleyoldia glabra
  • †Palliseria
    • †Palliseria robusta
  • †Palmerocrinus
    • †Palmerocrinus profundus – type locality for species
  • †Paltodus
    • †Paltodus compressus
  • †Pandaspinapyga
    • †Pandaspinapyga salsa
  • †Panderodus
    • †Panderodus equicostatus
    • †Panderodus gracilis
    • †Panderodus greenlandensis
    • †Panderodus panderi
    • †Panderodus unicostatus
  • †Parabolbina
    • †Parabolbina scotti
  • †Paraconularia
  • †Paracremacrinus
    • †Paracremacrinus laticardinalis
  • †Paracromyocrinus
    • †Paracromyocrinus oklahomensis
    • †Paracromyocrinus planatus – type locality for species
  • †Paradiabolocrinus
  • †Paraechmina
  • †Paragassizocrinus
    • †Paragassizocrinus tarri
  • †Parahealdia
    • †Parahealdia quaesita
  • †Paralegoceras
    • †Paralegoceras iowense
    • †Paralegoceras textum
  • †Parallelodon
    • †Parallelodon vokesi – type locality for species
  • †Paramelocrinus
    • †Paramelocrinus ubaghsi
  • †Paramphicrinus
  • †Paraparchites
    • †Paraparchites circulantis
    • †Paraparchites elongatus – or unidentified comparable form
    • †Paraparchites wapanuckensis
  • †Parapermopsylla – type locality for genus
    • †Parapermopsylla tricubita – type locality for species
  • †Parapostibulla
    • †Parapostibulla graysoni – type locality for species
  • †Paraprisca
    • †Paraprisca fragilis
  • †Pararchaeocrinus
    • †Pararchaeocrinus decoratus
  • †Parasaccites
    • †Parasaccites korbaenis
  • †Paraschmidtella
  • †Parastrophinella
    • †Parastrophinella lepida
  • †Parazophocrinus
    • †Parazophocrinus callosus
  • †Parelmoa – type locality for genus
    • †Parelmoa obtusa – type locality for species
    • †Parelmoa radialis – type locality for species
    • †Parelmoa revelata – type locality for species
  • †Parulrichia
    • †Parulrichia haragenensis
  • †Pasawioops – type locality for genus
    • †Pasawioops mayi – type locality for species
  • †Passalocrinus
  • †Paucicrura
    • †Paucicrura oklahomensis
    • †Paucicrura rogata – or unidentified comparable form
  • †Paurorthis
    • †Paurorthis macrodeltoidea
  • Fossils of the Late Devonian-Permian fern-like fronds Pecopteris
    †Pecopteris
    • †Pecopteris cyathea
    • †Pecopteris geinitzi
    • †Pecopteris hemitelioides
    • †Pecopteris miltonii
    • †Pecopteris plumosa-dentata – informal
    • †Pecopteris sarefolia
  • †Pelidocrinus
    • †Pelidocrinus exiguus
  • †Peltabellia
    • †Peltabellia implexa
  • †Peltacrinus
    • †Peltacrinus sculptatus
  • †Penicillicrinus
  • †Penniretepora
    • †Penniretepora ardmorensis – type locality for species
  • †Pennsylvanioxylon
  • †Pentameroides
  • Fossilized theca of the Carboniferous blastoid echinoderm ("sea bud") Pentremites
    †Pentremites
  • †Periglyptocrinus
    • †Periglyptocrinus priscus
  • †Perimestocrinus
    • †Perimestocrinus teneris
  • †Peripetoceras
  • †Permoberotha
    • †Permoberotha villosa – tentative report
  • †Permoblattina
    • †Permoblattina curta
  • †Permocoleus – type locality for genus
    • †Permocoleus wellingtonensis – type locality for species
  • †Permopanorpa
    • †Permopanorpa inaequalis
  • †Permophorus
    • †Permophorus albequus
    • †Permophorus immaturis
    • †Permophorus mexicanus
  • †Permopsylla
    • †Permopsylla americana – tentative report
  • †Perrinites
    • †Perrinites hilli
  • †Perryella – type locality for genus
    • †Perryella olsoni – type locality for species
  • Fossilized tooth of the Carboniferous-Permian shark Petalodus
    †Petalodus
  • †Petigurus
    • †Petigurus cullisoni
  • †Petraia – tentative report
  • †Petraster
  • †Petrocrania
    • †Petrocrania inflata
  • †Phacellopegma
    • †Phacellopegma schizoderma
  • †Phacelocrinus
    • †Phacelocrinus brevis – type locality for species
    • †Phacelocrinus rosei
  • †Phanassymetria
    • †Phanassymetria quadrupla
    • †Phanassymetria triserrata
  • †Phanelactis
  • †Phaneroneura – type locality for genus
    • †Phaneroneura martynovae – type locality for species
    • †Phaneroneura reducta – type locality for species
  • †Phanocrinus
    • †Phanocrinus alexanderi – type locality for species
  • †Pharkidonotus
    • †Pharkidonotus percarinatus
  • †Phenopterum
    • †Phenopterum elongatum
  • †Phestia
    • †Phestia inflata
  • †Philhedra
  • †Phillipsia – tentative report
  • †Phimocrinus
  • †Pholidocidaris – tentative report
    • †Pholidocidaris irregularis – or unidentified comparable form
  • †Phragmodus
    • †Phragmodus inflexus
    • †Phragmodus undatus
  • †Phragmolites
  • †Phricodothyris
  • †Phyloblatta
    • †Phyloblatta curvata
  • †Phymatopleura
    • †Phymatopleura heteropleura – type locality for species
    • †Phymatopleura nodosa
  • †Pidelocrinus
    • †Pidelocrinus planus
  • †Pilosisporites
    • †Pilosisporites aculeolatus
    • †Pilosisporites williamsii
  • Light micrograph of a Pinnularia alga
    †Pinnularia
  • †Pirocystella
  • †Pisocrinus
    • †Pisocrinus quinquelobus
    • †Pisocrinus spatulatus
    • †Pisocrinus spatulus
    • †Pisocrinus tennesseensis
  • †Pityosporites
    • †Pityosporites westphalensis
  • †Placotriplesia
    • †Placotriplesia praecipta
  • Fossilized shell of the Ordovician brachiopod Plaesiomys
    †Plaesiomys
    • †Plaesiomys bellistriatus
    • †Plaesiomys proavitus
    • †Plaesiomys subquadrata
  • †Plagioglypta
    • †Plagioglypta annulostriatum
  • †Planisporites
  • †Planobola
    • †Planobola macrogota
  • †Platyceras
    • †Platyceras subelegans
  • Three fossilized calyces of the Devonian-Permian crinoid ("sea lily") Platycrinites
    †Platycrinites
  • †Platycystites
    • †Platycystites bassleri
    • †Platycystites bromidensis
    • †Platycystites faberi
    • †Platycystites fimbriatus
    • †Platycystites infundus
    • †Platycystites levatus
  • †Platyfundocrinus
    • †Platyfundocrinus webbersensis – type locality for species
  • †Platymena – tentative report
    • †Platymena bellatula
  • †Platyrhomboides
    • †Platyrhomboides quadratus
  • †Platysaccus
    • †Platysaccus papilionis
    • †Platysaccus saarensis
  • Life restoration of the Carboniferous-Permian bony fish Platysomus
    †Platysomus
    • †Platysomus palmaris – or unidentified comparable form
  • †Platystrophia
    • †Platystrophia prima
    • †Platystrophia sutherlandi
    • †Platystrophia uncinata
  • †Plectambonites
    • †Plectambonites sericeus
  • †Plectodonta
    • †Plectodonta petila
  • †Plectoglossa
    • †Plectoglossa oklahomensis
  • †Plectorthis
    • †Plectorthis punctata
    • †Plectorthis symmetrica
  • †Pleuracanthus
    • †Pleuracanthus gracilis
  • Fossil of the Late Ordovician cystoid echinoderm Pleurocystites
    †Pleurocystites
    • †Pleurocystites watkinsi
  • †Plicochonetes
  • †Pliomerops
    • †Pliomerops canadensis – or unidentified comparable form
  • †Pluchratia
  • †Plummericrinus
    • †Plummericrinus expansus – type locality for species
  • †Poikilofusa
    • †Poikilofusa plethysticha
  • †Polidevcia
    • †Polidevcia bellistriata
    • †Polidevcia vaseyana – or unidentified comparable form
  • †Poloniella
    • †Poloniella chaleurensis – or unidentified comparable form
  • †Polyancistrodorus
    • †Polyancistrodorus columbariferus
  • †Polycaulodus
    • †Polycaulodus bidentatus
    • †Polycaulodus tridentatus
  • †Polycladiopora
    • †Polycladiopora pinnata – or unidentified comparable form
  • †Polydeltoideus
    • †Polydeltoideus enodatus
  • †Polygnathodella – type locality for genus
    • †Polygnathodella ouachitensis – type locality for species
  • †Polygnathoides
    • †Polygnathoides siluricus
  • †Polygnathus
    • †Polygnathus wapanuckensis – type locality for species
  • †Polylophothylax
    • †Polylophothylax crossii
  • †Polyplacognathus
    • †Polyplacognathus sweeti
  • †Polypora
    • †Polypora debilis – type locality for species
    • †Polypora ovicellata – type locality for species
  • †Polytylites
    • †Polytylites coryelli – type locality for species
    • †Polytylites kellettae – type locality for species
    • †Polytylites levinsoni – type locality for species
  • †Porocrinus
    • †Porocrinus bromidensis
  • †Postibulla
    • †Postibulla westergaardi – type locality for species
  • †Poteriocrinus – tentative report
  • †Potonieisporites
    • †Potonieisporites simplex – type locality for species
  • †Praecursoricrinus
    • †Praecursoricrinus sulphurensis
  • †Praepleurocystis
    • †Praepleurocystis watkinsi
  • †Prasopora
    • †Prasopora fritzae
  • †Primitiella
    • †Primitiella varicata
  • †Primitiopsis
    • †Primitiopsis bassleri
    • †Primitiopsis elegans
    • †Primitiopsis excavatus
    • †Primitiopsis minutus
  • †Prioniodus
    • †Prioniodus altodus – type locality for species
    • †Prioniodus gerdae
  • †Prismopora
  • †Proallosocrinus
    • †Proallosocrinus exemptus – type locality for species
    • †Proallosocrinus glenisteri – type locality for species
  • †Probnis
    • †Probnis speciosa
  • †Probolichas
  • †Prodentalium
  • †Productella
    • †Productella recensis – type locality for species
  • †Productus
    • †Productus parvus
    • †Productus stehlii – type locality for species
  • Restoration of the Silurian trilobite Proetus
    †Proetus
    • †Proetus foculus
  • †Progoneura
    • †Progoneura grimaldii – type locality for species
    • †Progoneura nobilis – type locality for species
    • †Progoneura venula – type locality for species
  • †Prokopicrinus
    • †Prokopicrinus laevis
    • †Prokopicrinus tuberculatus
  • †Promopalaeaster
  • †Proshumardites
  • †Protencrinus
    • †Protencrinus atoka – type locality for species
  • †Protereisma
    • †Protereisma arcuatum – or unidentified comparable form
    • †Protereisma latum
  • †Prothalassoceras
    • †Prothalassoceras inexpectans – type locality for species
  • †Prothyris
    • †Prothyris soleniformis – type locality for species
  • †Protocaptorhinus
    • †Protocaptorhinus pricei
  • †Protohaploxypinus
    • †Protohaploxypinus duivenii
    • †Protohaploxypinus rugosus
    • †Protohaploxypinus samoilovichii
    • †Protohaploxypinus suchonensis – or unidentified comparable form
  • †Protohymen
    • †Protohymen anomalus – type locality for species
    • †Protohymen bifurcatus – type locality for species
    • †Protohymen curvatus – type locality for species
    • †Protohymen largus – type locality for species
    • †Protohymen latus – type locality for species
    • †Protohymen pictus – type locality for species
    • †Protohymen readi
    • †Protohymen shafferi – type locality for species
    • †Protohymen venustus – type locality for species
  • †Protozyga
    • †Protozyga loeblichi
  • †Prouddenites
    • †Prouddenites primus
  • †Pseodorthoceras
  • †Pseudelmoa – type locality for genus
    • †Pseudelmoa ampla – type locality for species
  • †Pseudoconocardium
  • †Pseudocryptophyllum – or unidentified comparable form
  • †Pseudodielasma
    • †Pseudodielasma perplexa
  • †Pseudoiasvia – type locality for genus
    • †Pseudoiasvia sinuosa – type locality for species
  • †Pseudolingula
    • †Pseudolingula elegantula – or unidentified comparable form
    • †Pseudolingula imperfecta
  • †Pseudomera
    • †Pseudomera barrandei
  • †Pseudomonotis – tentative report
  • †Pseudomulceodens
    • †Pseudomulceodens cancellatus – or unidentified related form
  • †Pseudoolenoides
    • †Pseudoolenoides acicaudus
    • †Pseudoolenoides carterensis – type locality for species
    • †Pseudoolenoides derbyi – type locality for species
  • †Pseudooneotodus
    • †Pseudooneotodus bicornis
    • †Pseudooneotodus linguicornis
  • †Pseudoparalegoceras
    • †Pseudoparalegoceras brazoense
  • †Pseudopronorites
    • †Pseudopronorites arkansasense
    • †Pseudopronorites quinni
  • †Pseudorthoceras
    • †Pseudorthoceras knoxense
  • †Pseudosyrinx
    • †Pseudosyrinx missouriensis – or unidentified comparable form
  • †Pseudothoceras
  • †Pseudozygopleura
    • †Pseudozygopleura multicostata – tentative report
    • †Pseudozygopleura peoriense
    • †Pseudozygopleura plebium – tentative report
    • †Pseudozygopleura scitula
  • †Psilokirkbyella
    • †Psilokirkbyella magnopuncata
  • †Psophosphaera
    • †Psophosphaera greeri
  • †Pteroconus – tentative report
    • †Pteroconus abbreviatus
  • †Pteronites
    • †Pteronites angustatus – or unidentified comparable form
  • †Pterotocrinus – tentative report
    • †Pterotocrinus springerensis – type locality for species
  • †Ptychocladia
    • †Ptychocladia bassleri
  • †Ptychopleurella
    • †Ptychopleurella rugiplicata
  • †Pudoproetus
    • †Pudoproetus chappelensis
  • †Pulchratia
  • †Pulchrilamina
    • †Pulchrilamina spinosa
  • †Punctaparchites
    • †Punctaparchites rugosus
  • †Punctatisporites
    • †Punctatisporites flavus
    • †Punctatisporites glaber
    • †Punctatisporites minutus
  • †Punctatosporites
    • †Punctatosporites minutus
  • †Punctospirifer
    • †Punctospirifer kentuckensis
    • †Punctospirifer subtexta
    • †Punctospirifer transversa
  • †Punctothyris
    • †Punctothyris kenwoodensis
  • †Punka
    • †Punka akoura
    • †Punka verecunda
  • †Pustula
    • †Pustula kenwoodensis – type locality for species
    • †Pustula oklahomae – type locality for species
  • †Pycnopora
    • †Pycnopora ovatipora – type locality for species
  • †Pygmaeocrinus
  • †Pyrgocystis

Q
  • †Quadrocystis
    • †Quadrocystis graffhami

R
  • †Raaschia – type locality for genus
    • †Raaschia oklahomensis – type locality for species
  • †Rafinesquina
  • †Raistrickia
    • †Raistrickia abdita
    • †Raistrickia aculeata
    • †Raistrickia aculeolata
    • †Raistrickia breveinens
    • †Raistrickia crinita
    • †Raistrickia crocea
  • †Rakverella – tentative report
  • †Ranapeltis
    • †Ranapeltis rowlandi – type locality for species
  • †Ranasasus
    • †Ranasasus brevicephalus
    • †Ranasasus colossus
    • †Ranasasus conicus
  • †Randaynia
    • †Randaynia leatherburyi
  • †Raphistoma
  • †Rayella
    • †Rayella calvini
    • †Rayella parva
  • †Raymondites
  • †Rayonnoceras
    • †Rayonnoceras vaughanianum – type locality for species
  • †Rectifenestella
    • †Rectifenestella tenax
  • †Redstonia
    • †Redstonia cooperi
  • †Reedops
    • †Reedops deckeri
  • †Regulaecystis
  • †Remopleurides
  • †Renalcis
  • †Renaultia
  • †Rensselaerina
    • †Rensselaerina haraganana
  • Reophax
    • †Reophax oacuhitensis – type locality for species
  • †Resserella
    • †Resserella brownsportensis
  • †Reteocrinus
    • †Reteocrinus depressus – type locality for species
  • †Reticestus – tentative report
    • †Reticestus retiferus
  • †Reticulaiina
  • †Reticulariina
  • †Reticulatisporites
    • †Reticulatisporites reticulatus
  • †Reticulopteris
    • †Reticulopteris muensteri
  • †Retispira
    • †Retispira meekiana
    • †Retispira reticulata – type locality for species
  • †Rhabdomeson
    • †Rhabdomeson foerstei – type locality for species
    • †Rhabdomeson rogersi – type locality for species
    • †Rhabdomeson ulrichi – type locality for species
  • †Rhipidomella
    • †Rhipidomella acutisulcata – type locality for species
    • †Rhipidomella diminutiva
    • †Rhipidomella henryhousensis – type locality for species
    • †Rhipidomella oklahomensis – type locality for species
    • †Rhipidomella subtriangularis – type locality for species
  • †Rhipidomelloides
    • †Rhipidomelloides oblata
  • †Rhiptosocherma
    • †Rhiptosocherma improcera
  • †Rhizomaspora – type locality for genus
    • †Rhizomaspora divaricata – type locality for species
    • †Rhizomaspora lemniscata – type locality for species
    • †Rhizomaspora radiata – type locality for species
  • †Rhizomospora
  • †Rhizophyllum
  • †Rhombocladia
  • †Rhombopora
    • †Rhombopora johnsvalleyensis – type locality for species
    • †Rhombopora nitidula – type locality for species
  • †Rhopalia
    • †Rhopalia catenata
  • Life restoration of the Permian amphibian Rhynchonkos
    †Rhynchonkos
    • †Rhynchonkos stovalli – type locality for species
  • †Rhynchopora
    • †Rhynchopora kollari – type locality for species
    • †Rhynchopora persinuata
  • †Rhynchospirina
    • †Rhynchospirina maxwelli – type locality for species
  • †Rhynchotrema
    • †Rhynchotrema increbescens – tentative report
  • †Richardsonites
    • †Richardsonites richardsonianus – type locality for species
  • †Rishona
  • Fossil of the barnacle boring ichnogenus Rogerella
    Rogerella
  • †Rollia
    • †Rollia goodwini
  • Rostricellula
    • †Rostricellula cuneata
  • †Rothella
    • †Rothella haraganensis – type locality for species
    • †Rothella obliqua
    • †Rothella recta
  • †Rothianiscus
    • †Rothianiscus robusta – type locality for species
  • †Roundyella
    • †Roundyella bellatula
  • †Rowleyella
    • †Rowleyella fabulites
  • †Rugosochinetes
  • †Rugosochonetes
    • †Rugosochonetes multicostus

S
  • †Saccocrinus
    • †Saccocrinus benedicti
  • †Saffordotaxis
  • †Sagenodus
    • †Sagenodus vinslovi
  • †Sandia
  • †Sanguinolites
    • †Sanguinolites omalianus
    • †Sanguinolites raleighensis
    • †Sanguinolites simulans
  • †Sansabella
    • †Sansabella keslingi – type locality for species
    • †Sansabella truncata – or unidentified comparable form
  • †Sansabelloides
  • †Sargentina
    • †Sargentina allani – or unidentified comparable form
  • †Saucrophyllum
  • †Scaphiocrinus – tentative report
  • †Schellwienella
    • †Schellwienella marcidula
  • †Schistoceras
    • †Schistoceras unicum – type locality for species
  • †Schizambon
    • †Schizambon perspinosum
  • †Schizodus
    • †Schizodus chesterensis
    • †Schizodus ovatus
    • †Schizodus texanus
  • †Schizonema
    • †Schizonema hami
  • †Schizophoria
    • †Schizophoria mayesensis – type locality for species
  • †Schmidtella
    • †Schmidtella affinis
    • †Schmidtella asymmetrica
    • †Schmidtella brevis
    • †Schmidtella crassimarginata
    • †Schmidtella excavata
    • †Schmidtella minuta
    • †Schmidtella ovalis
    • †Schmidtella transversa
  • †Schopfipollenites
    • †Schopfipollenites signatus – type locality for species
  • †Schuchertella
    • †Schuchertella attentuata
    • †Schuchertella haraganensis
  • †Sciadiocrinus
    • †Sciadiocrinus cascus – type locality for species
    • †Sciadiocrinus crassacanthus
    • †Sciadiocrinus planulatus
  • †Scolecia
    • †Scolecia filosa
  • †Scolecopteris
    • †Scolecopteris altissima
    • †Scolecopteris gnoma
  • †scolerodont
  • †Scolopodus
    • †Scolopodus oklahomensis – type locality for species
    • †Scolopodus striatum – type locality for species
  • †Scutepustula
    • †Scutepustula arctifossa
  • †Scyphocrinites
  • Fossilized calyx of the Carboniferous crinoid ("sea lily") Scytalocrinus
    †Scytalocrinus
    • †Scytalocrinus crassibrachiatus – type locality for species
    • †Scytalocrinus sansabensis
  • †Sedgwickia
    • †Sedgwickia rugosa – type locality for species
  • †Seminolites
    • †Seminolites kosomensis – type locality for species
    • †Seminolites perforatus – type locality for species
    • †Seminolites pushmatahensis – type locality for species
  • †Seminolithes
    • †Seminolithes clarkei – type locality for species
  • †Senftenbergia
  • †Septimyalina
    • †Septimyalina burmai
  • †Septopora
  • Fossilized skeleton of the Permian primitive four-limbed animal Seymouria
    †Seymouria
    • †Seymouria baylorensis
  • †Shaleria – tentative report
  • †Shansiella
    • †Shansiella carbonaria – tentative report
  • †Shumardoceras
  • †Sibyrhynchus
  • †Sieberella
    • †Sieberella roemeri
  • †Sievertsia
  • Fossilized stump of the Carboniferous-Permian club moss relative Sigillaria
    †Sigillaria
  • †Sigmophlebia – type locality for genus
    • †Sigmophlebia engeli – type locality for species
  • †Sillerpeton – type locality for genus
    • †Sillerpeton permianum – type locality for species
  • †Sinclairocystis
    • †Sinclairocystis angulatus
    • †Sinclairocystis praedicta
    • †Sinclairocystis sulphurensis
  • †Sinuitina
    • †Sinuitina cordiformis – type locality for species
  • †Sinuopea
    • †Sinuopea basiplanata
    • †Sinuopea vera
  • †Siphonocrinus
    • †Siphonocrinus dignus
  • †Skenidioides
    • †Skenidioides henryhousensis
    • †Skenidioides oklahomensis
    • †Skenidioides perfectus
  • †Skenidium
    • †Skenidium insigne
  • Fossilized shells of the marine bivalve Solecurtus
    Solecurtus
    • †Solecurtus gardneri – type locality for species
  • Solemya – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Soleniscus
    • †Soleniscus primigenia
    • †Soleniscus regularis
  • †Solenochilus
  • †Solenomorpha – tentative report
    • †Solenomorpha nitida – or unidentified comparable form
  • †Somoholites
  • †Sowerbyella
    • †Sowerbyella indistincta
    • †Sowerbyella plicatifera
    • †Sowerbyella variabilis
    • †Sowerbyella vulgata
  • †Sowerbyites
    • †Sowerbyites hami
    • †Sowerbyites lamellosus
  • †Spaniocrinus
  • †Speyeris
    • †Speyeris hami
  • Fossil of the Middle Ordovician-Silurian trilobite Sphaerexochus
    †Sphaerexochus
    • †Sphaerexochus glaber
  • †Sphaerirhynchia
    • †Sphaerirhynchia glomerosa – type locality for species
    • †Sphaerirhynchia lindenensis
  • †Sphaerocoryphe
  • †Sphaerodoma
    • †Sphaerodoma gracilis
  • †Sphaerolepis
    • †Sphaerolepis arctata
  • Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum
    †Sphenophyllum
    • †Sphenophyllum emarginatum
    • †Sphenophyllum gilmorei
    • †Sphenophyllum latifolium – or unidentified comparable form
    • †Sphenophyllum obovatum
    • †Sphenophyllum stoukenbergi – tentative report
  • †Sphenopteris
    • †Sphenopteris macilenta
  • †Spinobairdia
  • †Spinocarinifera
    • †Spinocarinifera semicostata
  • †Spinosporites
    • †Spinosporites exiguus
  • Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer
    †Spirifer
    • †Spirifer casteri – type locality for species
    • †Spirifer grimesi
    • †Spirifer opimus
  • †Spiriferellina
  • †Spirillina
    • †Spirillina bendensis – type locality for species
  • Spirorbis
    • †Spirorbis elegans – type locality for species
  • †Spongophylloides
  • †Squamularia
  • †Stacheia
    • †Stacheia congesta
  • †Staffella
  • †Stegerhynchus
    • †Stegerhynchus carmelensis
    • †Stegerhynchus clairensis
    • †Stegerhynchus concinna
  • †Stegnopsis
    • †Stegnopsis erythragora – type locality for species
    • †Stegnopsis wellingensis – type locality for species
  • †Stegocoelia
  • †Stellarocrinus
    • †Stellarocrinus cuneatus
  • †Stenocladia – tentative report
    • †Stenocladia bassleri
  • †Stenopecrinus
    • †Stenopecrinus ornatus – type locality for species
  • †Stenopora
  • †Stephanozyga
  • †Steptognathodus
  • †Stereobrachicrinus – type locality for genus
    • †Stereobrachicrinus pustullosus – type locality for species
  • †Stereostylus
    • †Stereostylus perversus
  • †Stictopora
    • †Stictopora fenestrata
  • †Strabocystis – type locality for genus
    • †Strabocystis fayi – type locality for species
  • †Straparollus
  • †Straparolous
    • †Straparolous catilloides
    • †Straparolous catiloides
  • †Streblochondria – tentative report
    • †Streblochondria tenuilineata
  • †Strebloplax – type locality for genus
    • †Strebloplax crustacea – type locality for species
  • †Streblotrypa
    • †Streblotrypa nicklesi
  • †Streptognathodus
  • †Streptorhynchus
  • †Striatites
    • †Striatites richteri
  • †Striatopodocarpites
    • †Striatopodocarpites caricicostatus
    • †Striatopodocarpites communis
    • †Striatopodocarpites olsonii
  • †Strigigenalis
    • †Strigigenalis caudata
    • †Strigigenalis crassimarginata
    • †Strigigenalis derbyi
    • †Strigigenalis implexa
    • †Strigigenalis insentis
    • †Strigigenalis knighti – or unidentified comparable form
  • †Strimplecystis – type locality for genus
    • †Strimplecystis oklahomensis – type locality for species
  • †Strixella
    • †Strixella acutisulcata
  • †Strobeus
    • †Strobeus brevis
    • †Strobeus gouldiana – type locality for species
    • †Strobeus intercalaris
    • †Strobeus paludinaeformis
  • †Stroboceras
    • †Stroboceras furnishi – type locality for species
  • †Stromatotrypa
    • †Stromatotrypa frondosa
  • †Strongylocrinus
    • †Strongylocrinus hansoni – type locality for species
    • †Strongylocrinus ornatus – type locality for species
  • †Strophochonetes
  • Fossilized shell of the Ordovician-Silurian brachiopod Strophomena
    †Strophomena
    • †Strophomena clermontensis
    • †Strophomena costellata
    • †Strophomena crinerensis
    • †Strophomena neglecta
    • †Strophomena oklahomensis
    • †Strophomena perconcava – or unidentified comparable form
    • †Strophomena planumbona
    • †Strophomena trentonensis
  • †Strophonella
    • †Strophonella alterniradiata
    • †Strophonella bransoni – type locality for species
    • †Strophonella laxiplicata
    • †Strophonella loeblichi
    • †Strophonella prolongata
  • †Strophostylus
  • †Strotersporites – type locality for genus
    • †Strotersporites communis – type locality for species
  • †Stylocrinus
  • †Sulcatisporites
    • †Sulcatisporites potoniei
  • †Sylvohymen
    • †Sylvohymen ingens – type locality for species
  • †Synchirocrinus
    • †Synchirocrinus divisus
    • †Synchirocrinus quadratus
  • †Synerocrinus
    • †Synerocrinus farishi
  • †Syngastrioceras
    • †Syngastrioceras clinei – type locality for species
    • †Syngastrioceras scotti
  • †Syringaxon

T
  • †Tabulipora
    • †Tabulipora macnairi – type locality for species
    • †Tabulipora simplex – type locality for species
    • †Tabulipora tuberculata – or unidentified comparable form
  • †Taeniaesporites
    • †Taeniaesporites noviaulensis – or unidentified comparable form
  • †Taeniopteris
    • †Taeniopteris abnormis
    • †Taeniopteris multinervis
  • †Tainoceras
    • †Tainoceras murrayi
  • †Tanaocystis
    • †Tanaocystis watkinsi
  • †Tarphyceras
    • †Tarphyceras chadwickense
  • †Teguliferina
    • †Teguliferina parva – type locality for species
  • †Tegulocrea
    • †Tegulocrea incerta
  • †Teiichispira
    • †Teiichispira affinis – or unidentified comparable form
  • †Tellinomorpha
    • †Tellinomorpha schencki – type locality for species
  • Fossilized shell of the Early Ordovician-Late Devonian probable mollusc Tentaculites
    †Tentaculites
  • †Terpnocrinus
  • †Tersomius
    • †Tersomius dolesensis – type locality for species
    • †Tersomius mosesi – type locality for species
    • †Tersomius texensis – or unidentified comparable form
  • †Tetradellina
    • †Tetradellina henningsmoeni
  • †Tetrataxis
    • †Tetrataxis decurrens – or unidentified comparable form
    • †Tetrataxis lata
  • Fossilized shell of the Carboniferous-modern foraminiferan Textularia
    Textularia
    • †Textularia grahamensis – or unidentified comparable form
  • †Thalamocrinus
    • †Thalamocrinus elongatus
  • †Thalattocanthus
    • †Thalattocanthus consonus
  • †Thaleops
    • †Thaleops jaanussoni
  • †Thallograptus
  • †Thamniscus
    • †Thamniscus erectus – type locality for species
  • †Thigriffides
    • †Thigriffides roundyi
  • †Thlipsura
    • †Thlipsura furca
  • †Thlipsurella
    • †Thlipsurella fossata
    • †Thlipsurella muricurva
    • †Thlipsurella murrayensis – type locality for species
    • †Thlipsurella putea
  • †Thlipsuroides
  • †Thomasatia
    • †Thomasatia auricula
  • †Thomasatina
    • †Thomasatina bromidensis
    • †Thomasatina simplex
  • †Thoracoceras
  • †Thrausmosaurus – type locality for genus
    • †Thrausmosaurus serratidens – type locality for species
  • †Thuroholia
    • †Thuroholia crinerensis
    • †Thuroholia croneisi
    • †Thuroholia overbrookensis
  • †Thymnospora
    • †Thymnospora pseudothiessenii – or unidentified comparable form
  • †Thymospora
    • †Thymospora pseudothiessenii
  • †Tolypammina
  • †Torispora
    • †Torispora securis
  • †Torynifer
  • †Trematospira
    • †Trematospira costata – or unidentified comparable form
    • †Trematospira hippolyte – or unidentified comparable form
  • †Trepospira
    • †Trepospira depressa
  • †Trigonirhynchia
    • †Trigonirhynchia acutirostella
  • Fossilized skull of the Permian amphibian Trimerorhachis
    †Trimerorhachis
    • †Trimerorhachis insignis
  • †Triquitrites
    • †Triquitrites additus
    • †Triquitrites bransonii
    • †Triquitrites exiguus
    • †Triquitrites sculptilis
    • †Triquitrites spinosus
    • †Triquitrites subspinosus
    • †Triquitrites tribullatus
  • †Tririctus – type locality for genus
    • †Tririctus reticulatus – type locality for species
  • †Tritonoceras
  • †Trochonodella
    • †Trochonodella obtusa
  • †Trochosporites – type locality for genus
    • †Trochosporites reniformis – type locality for species
  • †Trucherognathus
    • †Trucherognathus distorta
    • †Trucherognathus irregularis
  • †Tryplasma
  • †Tuberculatosporites
    • †Tuberculatosporites robustus
  • †Tubulibairdia
    • †Tubulibairdia simplex
  • †Tupus
    • †Tupus gracilis – type locality for species
  • †Turgidacystis – type locality for genus
    • †Turgidacystis graffhami – type locality for species
  • †Turrilepas
    • †Turrilepas whithersi – type locality for species

U
  • †Ulocrinus
  • †Ulrichia
  • †Ulrichidiscus
    • †Ulrichidiscus forbesi – type locality for species
  • †Unibothriocidaris
  • Fossil of the Ordovician-Devonian sea star Urasterella
    †Urasterella
  • †Utharocrinus
    • †Utharocrinus pentanodus

V
  • †Valcourea
    • †Valcourea transversa
  • Varanodon
    †Varanodon – type locality for genus
    • †Varanodon agilis – type locality for species
  • †Varanops
    • †Varanops brevirostris – or unidentified comparable form
  • †Veliberychia
  • †Vermiporella – tentative report
  • †Verrucosisporites
    • †Verrucosisporites grandiverrucosus
    • †Verrucosisporites microtuberosus
    • †Verrucosisporites verrucosus – or unidentified comparable form
  • †Veryhachium
    • †Veryhachium bromidense
    • †Veryhachium irroratum
  • †Vesicaspora
    • †Vesicaspora schemelii
    • †Vesicaspora wilsonii
  • †Vestispora
    • †Vestispora fenestrata
    • †Vestispora foveata
    • †Vestispora pseudoreticulata
    • †Vestispora wanlessii
  • †Victoriacystis
    • †Victoriacystis holmesorum – or unidentified related form
  • †Villosacapsula
    • †Villosacapsula entriche
  • †Vinella
    • †Vinella bilineata – type locality for species
  • †Virginiata
    • †Virginiata arkansana
  • †Vittatina
    • †Vittatina costabilis – type locality for species
    • †Vittatina lata – type locality for species
    • †Vittatina simplex
    • †Vittatina verrucosa
  • †Vogdesia
    • †Vogdesia bromidensis
  • †Voiseyella
    • †Voiseyella novamexicana

W
  • †Waagenella
    • †Waagenella crassus – or unidentified comparable form
  • Fossilized foliage of the Carboniferous-Permian conifer Walchia
    †Walchia
    • †Walchia gracilis – or unidentified comparable form
    • †Walchia imbricata – tentative report
  • †Walliserodus
  • †Watongia – type locality for genus
    • †Watongia meieri – type locality for species
  • †Wedekindellina
  • †Wellerella
  • †Wellergyi
    • †Wellergyi brazerianum
  • †Wellerites
    • †Wellerites mohri
  • †Wewokella
    • †Wewokella solida
  • †Wewokites
    • †Wewokites venatus
  • †Whitspakia
    • †Whitspakia schucherti
  • †Wichitoceras
    • †Wichitoceras crassum
    • †Wichitoceras decipiens
  • †Wiedeyoceras
  • †Wilkingia
    • †Wilkingia rothi
  • †Wilsonites
    • †Wilsonites delicatus
    • †Wilsonites vesicatus
  • †Winchellatina
    • †Winchellatina cornuta
    • †Winchellatina longispina
  • †Worthenia
    • †Worthenia tabulata
  • †Wurmiella
    • †Wurmiella excavata
    • †Wurmiella posthamata

X

Y
  • †Yochelsonospira
    • †Yochelsonospira thomasi – type locality for species
  • Yoldia
  • †Youngiella
    • †Youngiella wapanuckensis – type locality for species

Z
  • †Zaphrentites
    • †Zaphrentites arkansanus
  • Life restoration of the Permian amphibian Zatrachys
    †Zatrachys
    • †Zatrachys serratus
  • †Zeilleria
  • †Zelophyllum
  • †Zenocrinus
    • †Zenocrinus zeus – type locality for species
  • †Zonalasporites
    • †Zonalasporites punctaticus – type locality for species
    • †Zonalasporites punctatus
  • †Zophocrinus
    • †Zophocrinus angulatus
  • †Zosterosporites
    • †Zosterosporites triangularis
  • †Zygopleura
  • †Zygopteris
    • †Zygopteris illinoiensis
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References
  1. Michael deBraga; Joseph J. Bevitt; Robert R. Reisz (2019). "A new captorhinid from the Permian cave system near Richards Spur, Oklahoma, and the taxic diversity of Captorhinus at this locality". Frontiers in Earth Science. 7: Article 112. doi:10.3389/feart.2019.00112.
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