List of the Paleozoic life of Michigan

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

A
  • †Acanthoclema
    • †Acanthoclema ohioensis
  • †Acanthonema – type locality for genus
    • †Acanthonema holopiforme – type locality for species
    • †Acanthonema laxa – type locality for species
  • †Acidaspis
  • †Actinoceras
    • †Actinoceras backi[1]
    • †Actinoceras bigsbyi – or unidentified comparable form
    • †Actinoceras gouldense – type locality for species[1]
    • †Actinoceras sphaeroidale[1]
  • †Alaskozygopleura
    • †Alaskozygopleura gracillium
  • Fossilized fronds of the Carboniferous-Early Cretaceous seed fern Alethopteris
    †Alethopteris
    • †Alethopteris decurrens
    • †Alethopteris Helenae
  • †Allonema
  • †Ambocoelia – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Ambocoelia umbonata – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Ambonychia
    • †Ambonychia carinata
    • †Ambonychia elroyi
    • †Ambonychia obesa
  • †Amphilichas
    • †Amphilichas cucullus – tentative report
  • †Anazyga
    • †Anazyga recurvirostra
  • Fossil of the Carboniferous horsetail relative Annularia
    †Annularia
    • †Annularia asteris
    • †Annularia sphenophylloides
  • †Anomalodonta
    • †Anomalodonta gigantea – or unidentified comparable form
  • †Anoptera
    • †Anoptera angusta
  • †Anthropora
    • †Anthropora shafferi
  • †Antirotella
    • †Antirotella helicinaeformis – type locality for species
  • †Archinacella
    • †Archinacella kagawongensis
  • †Arcyzona
    • †Arcyzona apobathrota
  • †Arthroacantha
    • †Arthroacantha carpenteri
  • †Ascodictyon
    • †Ascodictyon fusiforme
  • †Asolanus
    • †Asolanus camptotaena
  • †Asterophyllites
    • †Asterophyllites equisetiformis
    • †Asterophyllites longifolius – or unidentified comparable form
    • †Asterophyllites vernensis
  • †Atactoechus
    • †Atactoechus typicus – or unidentified comparable form
  • †Athyris
    • †Athyris lens
    • †Athyris vittata
  • Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa
    †Atrypa
    • †Atrypa traversensis
  • †Aulacera
    • †Aulacera nodulifera
  • †Aulacotheca
    • †Aulacotheca Campbelli
  • †Aulocystis
    • †Aulocystis auloporoidea
    • †Aulocystis jacksoni
    • †Aulocystis lucasensis
  • †Aulopora
    • †Aulopora microbuccinata

B
  • †Batostoma
  • †Beatricea
    • †Beatricea undulata
  • Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon
    †Bellerophon
    • †Bellerophon barquensis – type locality for species
    • †Bellerophon newberryi
    • †Bellerophon pelops
  • †Bensbergia
    • †Bensbergia subcostata
  • †Bethanyphyllum
    • †Bethanyphyllum robustum
  • †Bicarina
    • †Bicarina petilitornata
  • †Bigalea – type locality for genus
    • †Bigalea yangi – type locality for species
  • †Billingsites
    • †Billingsites newberryi
  • †Bothrodendron
    • †Bothrodendron minutifolium
    • †Bothrodendron punctatum
  • †Botryllopora
    • †Botryllopora socialis
  • †Bowmanites
  • †Brachyprion
  • †Buechelia
    • †Buechelia tyrrelli
  • †Byssonychia
    • †Byssonychia richmondensis
  • Bythocypris
    • †Bythocypris cylindrica
  • †Bythopora
    • †Bythopora striata

C
  • Fossilized stems from the Carboniferous-Permian horsetail relative Calamites
    †Calamites
    • †Calamites carinatus
    • †Calamites cistii
    • †Calamites ramosus
    • †Calamites schutzeiformis
    • †Calamites suckowii
    • †Calamites undulatus
  • †Calapoecia
    • †Calapoecia cribriformis
    • †Calapoecia huronensis
  • †Callipleura
    • †Callipleura nobilis – or unidentified comparable form
  • †Callixylon
    • †Callixylon newberryi
  • Fossil of the Early Ordovician-Early Devonian trilobite Calymene
    †Calymene
  • †Camarotoechia
  • †Cardiocaron
    • †Cardiocaron reniformis
  • †Cardiocarpon
    • †Cardiocarpon annulatum
    • †Cardiocarpon bicuspidatum
    • †Cardiocarpon cuyahogae
    • †Cardiocarpon late-alatum
    • †Cardiocarpon ovale
  • Fossil of the Middle-Late Ordovician trilobite Ceraurus
    †Ceraurus
    • †Ceraurus simmonsi
  • †Cerithioides
    • †Cerithioides incomptum
  • †Cheirocrinus – tentative report
  • †Chonetes
    • †Chonetes ensicosta
    • †Chonetes hybus
    • †Chonetes pachyactis
  • †Clathronema
    • †Clathronema cingulata
  • †Clidophorus
    • †Clidophorus noquettensis
    • †Clidophorus ogontzensis
  • Assemblage of fossils of the Cambrian graptolite Climacograptus
    †Climacograptus
    • †Climacograptus putillus
  • †Coelospira
  • †Coleolus
  • †Colpomya
    • †Colpomya colgateri
  • †Columnaria
    • †Columnaria alveolata
    • †Columnaria calicina
    • †Columnaria stokesi
  • †Conularia
    • †Conularia formosa
    • †Conularia trentonensis
  • †Cordaianthus
    • †Cordaianthus ampullaceus
    • †Cordaianthus devonicus
  • Fossilized foliage of the Carboniferous-Permian conifer relative Cordaites
    †Cordaites
    • †Cordaites borassifolius
    • †Cordaites crassinervis
    • †Cordaites michiganensis
    • †Cordaites palmaeformis
    • †Cordaites principalis
    • †Cordaites Robbii – tentative report
  • †Cornulites
    • †Cornulites corrugatus
    • †Cornulites flexuosus
    • †Cornulites sterlingensis – or unidentified comparable form
  • †Corocrinus
    • †Corocrinus pettyesi
  • †Corynepteris
    • †Corynepteris coralloides – tentative report
  • †Cranaena
    • †Cranaena amygdaloidea – or unidentified related form
    • †Cranaena lincklaeni
    • †Cranaena romingeri
  • †Crenulazona
    • †Crenulazona angulata
  • †Cryptonella
  • †Ctenodonta
    • †Ctenodonta iphigenia
  • †Cuneamya
    • †Cuneamya miamiensis
  • †Cupularostrum
    • †Cupularostrum prolificum
  • †Cyclonema
    • †Cyclonema minuta
  • †Cylindrophyllum
    • †Cylindrophyllum profundum
  • †Cymatonota
    • †Cymatonota typicalis – or unidentified comparable form
  • †Cyrtina
    • †Cyrtina alpenensis
    • †Cyrtina hamiltonensis – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Cyrtina umbonata
  • †Cyrtoceras – tentative report[1]
  • †Cyrtodonta
    • †Cyrtodonta grandis
    • †Cyrtodonta potteri
  • †Cyrtolites
    • †Cyrtolites ornatus
  • †Cyrtostropha
    • †Cyrtostropha salteri

D
  • †Dalmanella
    • †Dalmanella emacerata
    • †Dalmanella jugosa
  • †Decorochilina
    • †Decorochilina robusta
  • †Denayella
    • †Denayella bella – type locality for species
  • †Devonalosia
    • †Devonalosia wrightorum
  • †Devonochonetes
    • †Devonochonetes coronatus
    • †Devonochonetes fragilis
    • †Devonochonetes scitulus
  • †Dictyobembix – type locality for genus
    • †Dictyobembix bella – type locality for species
  • †Diplothmema
  • †Discinites
    • †Discinites delectus
    • †Discinites jongmansi
  • †Discosorus[1]
    • †Discosorus ehlersi – type locality for species[1]
    • †Discosorus halli – type locality for species[1]
    • †Discosorus parksi – type locality for species[1]
    • †Discosorus remotus – tentative report[1]
  • †Douvillina
    • †Douvillina distans
  • †Duncanella – tentative report

E
  • †Echinocaris
    • †Echinocaris punctata
  • †Echinocoelia
  • †Elasmonema – tentative report
    • †Elasmonema corrugata
  • †Eldredgeops
    • †Eldredgeops rana
  • †Eliasopora
    • †Eliasopora stellatum
  • †Elita
    • †Elita filicosta
  • †Encrinurus
  • †Endoceras
  • †Eremopteris
    • †Eremopteris michiganensis
  • Fossils (figures 2-10) of the Silurian-Devonian eurypterid ("sea scorpion") Erieopterus
    †Erieopterus
    • †Erieopterus microphthalmus
  • †Euphemites – tentative report
    • †Euphemites devoniana
  • †Euryzone
    • †Euryzone latitornata – type locality for species
    • †Euryzone pharkidopyndax – type locality for species
  • †Euthyrhachis
    • †Euthyrhachis indianense

F
  • Fossil of the Late Ordovician-Permian tabulate coral Favosites
    †Favosites
  • †Ferganella
  • †Flexicalymene
    • †Flexicalymene croneisi
    • †Flexicalymene magnipapilla – type locality for species
    • †Flexicalymene meeki – or unidentified comparable form
    • †Flexicalymene planilabra – type locality for species
    • †Flexicalymene praelongicephala – type locality for species
    • †Flexicalymene quadricapita – type locality for species
    • †Flexicalymene senaria
  • †Floweria
    • †Floweria lirella

G
  • †Geniculograptus
    • †Geniculograptus pygmaeus
  • †Gennaeocrinus
    • †Gennaeocrinus chilmanae
    • †Gennaeocrinus romingeri
  • †Genuspira – type locality for genus
    • †Genuspira nodosa – type locality for species
  • †Gigantopteris
    • †Gigantopteris dawsoni
    • †Gigantopteris kellyi
  • Fossilized calyx and partial stem of the Devonian-Carboniferous crinoid ("sea lily") Gilbertsocrinus
    †Gilbertsocrinus
    • †Gilbertsocrinus ohioensis
  • †Ginkgophyllum
    • †Ginkgophyllum grandifolium
  • †Girvanella
    • †Girvanella richmondensis
  • †Glossograptus
  • †Grammysia
  • †Graptodictya
    • †Graptodictya proava
  • Multiple views of a fossil of the Ordovician horn coral Grewingkia
    †Grewingkia
    • †Grewingkia canadensis
    • †Grewingkia deltensis
  • †Gypidula
    • †Gypidula petoskeyensis

H
  • Fossil of the Ordovician bryozoan ("moss animal") Hallopora
    †Hallopora
    • †Hallopora subnodosa
  • †Halysites
    • †Halysites gracilis
  • †Hebertella
    • †Hebertella alveata
    • †Hebertella occidentalis
  • †Hederella
    • †Hederella alpenensis
    • †Hederella bilineata
    • †Hederella cirrhosa
    • †Hederella concinnoides
    • †Hederella delicatula
    • †Hederella filiformis
    • †Hederella magna
    • †Hederella parvirugosa
    • †Hederella rectifurcata
    • †Hederella reimanni
    • †Hederella stolonifera
    • †Hederella thedfordensis
    • †Hederella vagans
  • †Helicelasma
    • †Helicelasma rusticum
  • †Helicotoma
    • †Helicotoma brocki
  • †Helopora
    • †Helopora inexpectata
  • †Hercostrophia
    • †Hercostrophia robusta
  • †Hesperorthis
    • †Hesperorthis tricenaria
  • †Heterophrentis
    • †Heterophrentis simplex
  • †Heterotrypa
  • Fossil of the Devonian colonial rugose coral Hexagonaria, also known as a Petoskey stone
    †Hexagonaria
    • †Hexagonaria pericarinata
  • †Hindia
    • †Hindia subrotunda
  • †Hippocardia
    • †Hippocardia monroica
  • †Hippurograptus
  • †Hiscobeccus
    • †Hiscobeccus capax
  • Fossilized shells of the Ordovician-Carboniferous sea snail Holopea
    †Holopea
    • †Holopea hubbardi – or unidentified related form
  • †Holtedahlina
    • †Holtedahlina sulcata
  • †Hormotoma
    • †Hormotoma gracilis
  • †Hormotomina
    • †Hormotomina penduliobesa
  • †Howellella
  • †Huronia[1]
    • †Huronia annulata[1]
    • †Huronia bigsbyi[1]
      • †Huronia bigsbyi intermedia – type locality for variety[1]
    • †Huronia distincta[1]
    • †Huronia engadinensis – type locality for species[1]
    • †Huronia minuens[1]
    • †Huronia obliqua[1]
    • †Huronia paulodilatata[1]
    • †Huronia romingeri[1]
    • †Huronia turbinata[1]
    • †Huronia minuens[1]
    • †Huronia vertebralis[1]
  • †Huroniella[1]
    • †Huroniella ehlersi – type locality for species[1]
  • †Hyperoblastus
    • †Hyperoblastus reimanni
  • †Hypomphalocirrus
    • †Hypomphalocirrus rugosus

I
  • †Icriodus
    • †Icriodus latericrescens
  • †Illionia
  • †Inocaulis
  • †Intrapora
  • †Isochilina
  • Fossil of the Middle-Late Ordovician giant trilobite Isotelus.
    †Isotelus
    • †Isotelus gigas

K
  • †Kitikamispira
    • †Kitikamispira speciosum

L
  • †Leioclema
    • †Leioclema alpenense
  • †Leiorhynchus
    • †Leiorhynchus kelloggi
    • †Leiorhynchus lucasi
  • †Leperditia
  • †Lepidocarpon
    • †Lepidocarpon linear
  • Restoration of the Carboniferous-Late Triassic club moss relative Lepidodendron. Eli Heimans (1911).
    †Lepidodendron
    • †Lepidodendron aculeatum
    • †Lepidodendron Brittsii
    • †Lepidodendron dichotomum
    • †Lepidodendron lanceolatum
    • †Lepidodendron lycopodiodes
    • †Lepidodendron obovatum
    • †Lepidodendron obvatum
    • †Lepidodendron ophiurioides
    • †Lepidodendron vestitum
  • †Lepidostrobus
    • †Lepidostrobus bartlettii
  • †Leptaena
  • †Leptalosia
    • †Leptalosia radicans
  • †Leptobolus
    • †Leptobolus insignis
  • †Leptolosia
    • †Leptolosia radicans
  • †Leptotrypella
    • †Leptotrypella ohioensis
  • †Lichenocrinus
    • †Lichenocrinus tuberculatus
  • †Lingula
    • †Lingula changi
    • †Lingula cobourgensis
    • †Lingula ogontzensis
    • †Lingula progne – or unidentified comparable form
    • †Lingula whitfieldi – or unidentified comparable form
  • †Liospira
    • †Liospira micula
  • †Longispina
    • †Longispina lissohybus
  • †Lophospira
    • †Lophospira milleri
    • †Lophospira perangulata – or unidentified related form
  • †Lyopora
    • †Lyopora goldfussi

M
  • †Maelonoceras
    • †Maelonoceras ligarius
  • †Manitobiella
    • †Manitobiella goniostoma
  • †Mariopteris
    • †Mariopteris muricata
    • †Mariopteris nervosa
  • †Mastigograptus
  • †Mastigospira
    • †Mastigospira ingens – type locality for species
    • †Mastigospira intermedia – type locality for species
  • †Mediospirifer
    • †Mediospirifer audaculus
  • †Megastrophia
    • †Megastrophia concava
  • Illustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod Meristella
    †Meristella
  • †Mesocoelia
    • †Mesocoelia obstipisutura
    • †Mesocoelia priscum
  • †Mesotrypa
  • †Modiolopsis
    • †Modiolopsis noquettensis
    • †Modiolopsis valida
  • †Monticulipora
    • †Monticulipora epidermata
  • Fossilized shell of the Devonian brachiopod Mucrospirifer
    †Mucrospirifer
    • †Mucrospirifer attenuatus
    • †Mucrospirifer grabaui
    • †Mucrospirifer latus
    • †Mucrospirifer mucronatus
    • †Mucrospirifer profundus
    • †Mucrospirifer prolificus
    • †Mucrospirifer thedfordensis
  • †Murchisonia
    • †Murchisonia akidota
    • †Murchisonia anderdoniae
    • †Murchisonia deludisubzona – type locality for species
    • †Murchisonia dowlingii
    • †Murchisonia gracilicrista
    • †Murchisonia sibleyensis
    • †Murchisonia subcarinata
    • †Murchisonia subulata – type locality for species

N
  • †Naticopsis
    • †Naticopsis manitobensis
  • Fronds of the Carboniferous seed fern Neuropteris
    †Neuropteris
    • †Neuropteris caudata
    • †Neuropteris dilitata
    • †Neuropteris flexuosa
    • †Neuropteris gigntea – tentative report
    • †Neuropteris harrisi – or unidentified comparable form
    • †Neuropteris heterophylla – or unidentified comparable form
    • †Neuropteris obliqua
    • †Neuropteris rarinervis
    • †Neuropteris saginawensis
    • †Neuropteris scheuchzeri
    • †Neuropteris Schlehani
    • †Neuropteris tenuifolia
  • †Nodonema
    • †Nodonema granulatum
  • †Nowakia
  • †Nuculites
    • †Nuculites neglectus
  • †Nuculoidea
    • †Nuculoidea lirata – or unidentified comparable form

O
  • †Odontopteris
  • †Oenonites
    • †Oenonites curvidens – or unidentified related form
  • Fossil of the Ordovician trilobite Ogygites
    †Ogygites
    • †Ogygites latimarginatus
  • †Oligorachs
    • †Oligorachs littletonensis
  • †Omphalocirrus
  • †Onchometopus
  • †Oncoceras
  • †Ophisthoptera
    • †Ophisthoptera casei – or unidentified comparable form
  • †Ophistoloba
    • †Ophistoloba gouldi
  • †Opisthoptera
    • †Opisthoptera gouldi
    • †Opisthoptera griffini
  • †Opisthopteri
    • †Opisthopteri casei – or unidentified comparable form
  • †Orbiculoidea
  • †Ormoceras[1]
    • †Ormoceras bayfieldi[1]
    • †Ormoceras whitei[1]
  • †Orthoceras
    • †Orthoceras alienum – or unidentified comparable form[1]
  • †Orthodesma
    • †Orthodesma subangulatum – or unidentified comparable form
  • †Orthograptus
    • †Orthograptus eucharis
    • †Orthograptus quadrimucronatus
    • †Orthograptus truncatus
  • †Orthonota
    • †Orthonota parvula
    • †Orthonota undulata
  • †Orthonychia
    • †Orthonychia variablis – type locality for species
  • †Orthopleura
    • †Orthopleura B Imbrie – informal
  • †Oxoplecia – or unidentified comparable form
    • †Oxoplecia calhouni

P
  • †Pachydictya
  • †Pagodea
    • †Pagodea falcatinoda – type locality for species
  • †Palaeopteridium
    • †Palaeopteridium Reussi
  • †Palaeoscurria – tentative report
  • †Palaeozygopleura
    • †Palaeozygopleura hamiltoniae
    • †Palaeozygopleura joani
    • †Palaeozygopleura sibleyensis
  • †Paleofavosites
    • †Paleofavosites asper
  • †Palmatopteris
    • †Palmatopteris furcata
  • †Panenka
    • †Panenka canadensis
  • †Papillicalymene
    • †Papillicalymene husseyi – type locality for species
  • Assemblage of the Early-Middle Devonian brachiopod Paraspirifer
    †Paraspirifer
    • †Paraspirifer bownockeri
  • †Paupospira
    • †Paupospira bowdeni
    • †Paupospira tropidophora
  • †Pecopteris
    • †Pecopteris dentata – tentative report
    • †Pecopteris miltoni
  • †Penniretepora
    • †Penniretepora irregularis – or unidentified comparable form
  • †Pentamerella
    • †Pentamerella athyroides
    • †Pentamerella aulax
    • †Pentamerella papilla
    • †Pentamerella pericosta
    • †Pentamerella petoskeyensis
    • †Pentamerella proteus
    • †Pentamerella E – informal
  • †Pentameroides
  • Fossilized shell of the Silurian-Middle Devonian brachiopod Pentamerus
    †Pentamerus
  • †Peronopora
    • †Peronopora decipiens
  • †Petrochus
    • †Petrochus conica – type locality for species
    • †Petrochus mellaria – type locality for species
  • †Petrocrania
    • †Petrocrania scabiosa
  • †Pholadomorpha
    • †Pholadomorpha pholadiformis
  • †Pholidops
    • †Pholidops subtruncata
  • †Pholidostrophia
    • †Pholidostrophia geniculata
    • †Pholidostrophia gracilis
    • †Pholidostrophia nacrea
    • †Pholidostrophia ovata
  • †Phragmolites
    • †Phragmolites slawsoni
  • †Physostoma
    • †Physostoma winchellii
    • †Physostoma Winchellii
  • †Plaesiomys
    • †Plaesiomys subquadrata
  • †Planalveolitella
    • †Planalveolitella parasitica
  • Fossilized shell of the Silurian-Early Triassic sea snail Platyceras
    †Platyceras
    • †Platyceras bucculentum
    • †Platyceras carinatum
    • †Platyceras rarispinum
  • †Platystrophia
    • †Platystrophia acutilirata
    • †Platystrophia annieana
    • †Platystrophia clarkesvillensis
    • †Platystrophia clarksvillensis
    • †Platystrophia cypha – or unidentified related form
    • †Platystrophia moritura
  • †Plectambonites
    • †Plectambonites rugosus
    • †Plectambonites sericeus
  • †Plectonotus
    • †Plectonotus raricostatus
  • Fossil of the Silurian-Carboniferous tabulate coral Pleurodictyum
    †Pleurodictyum
    • †Pleurodictyum cornu
  • †Polygnathus
    • †Polygnathus varcus
  • †Primitia
    • †Primitia cincinnatiensis
  • †Primitiella
    • †Primitiella stoningtonensis
    • †Primitiella unicornis
  • Proboscina
    • †Proboscina auloporoides
  • †Productella
  • Restoration of the Silurian trilobite Proetus
    †Proetus
    • †Proetus chambliensis
  • †Prosserella
    • †Prosserella subtransversa
  • †Protaraea
    • †Protaraea richmondensis
  • †Protarea
    • †Protarea richmondensis
  • †Protokionoceras[1]
  • †Protoleptostrophia
    • †Protoleptostrophia lirella
    • †Protoleptostrophia perplana
  • †Pseudoatrypa
    • †Pseudoatrypa devoniana – or unidentified comparable form
  • †Pseudomphalotrochus
    • †Pseudomphalotrochus cottrelli – type locality for species
    • †Pseudomphalotrochus gibsoni – type locality for species
  • †Pseudopecopteris
    • †Pseudopecopteris avoldensis – or unidentified comparable form
  • †Psiloconcha
    • †Psiloconcha subovalis
  • †Pterinea
    • †Pterinea demissa
    • †Pterinea insueta – or unidentified related form
    • †Pterinea insuetta – or unidentified related form
  • †Ptychomphalina
    • †Ptychomphalina lucina – tentative report
  • †Ptychopteria
    • †Ptychopteria fasciulatus
    • †Ptychopteria michiganesis
    • †Ptychopteria swanni
  • †Pugnoides

R
  • †Rafinesquina
    • †Rafinesquina alternata
    • †Rafinesquina breviusculus
    • †Rafinesquina pregibbosa
  • †Rafinesquna
    • †Rafinesquna pregibbosa
  • †Rectograptus
    • †Rectograptus amplexicaulis
    • †Rectograptus peosta
  • †Retispira
    • †Retispira sullivani
  • †Rhabdocarpus
    • †Rhabdocarpus mammilaris
    • †Rhabdocarpus mansfieldi
    • †Rhabdocarpus multistriatus
  • †Rhinocaris
    • †Rhinocaris ehlersi
  • †Rhipidomella
    • †Rhipidomella penelope – or unidentified comparable form
    • †Rhipidomella trigona
    • †Rhipidomella vanuxemi
  • †Rhipidothyris
    • †Rhipidothyris B – informal
  • †Rhombotrypa
    • †Rhombotrypa quadrata
    • †Rhombotrypa subquadrata
  • †Rhynchospirina
  • †Rhynchotrema
    • †Rhynchotrema minnesotensis – or unidentified comparable form
    • †Rhynchotrema perlamellosum
  • †Rugomena
    • †Rugomena vetusta
  • †Rutkowskicrinus
    • †Rutkowskicrinus collieri – type locality for species
    • †Rutkowskicrinus patriciae
  • †Rutkowskiella – type locality for genus
    • †Rutkowskiella tumula – type locality for species

S
  • †Samaropsis
    • †Samaropsis Newberryi
    • †Samaropsis newberryi
  • Fossils of the Cambrian mollusc Scenella
    †Scenella – tentative report
  • †Schizophoria
    • †Schizophoria ferronensis
    • †Schizophoria mesacarina
    • †Schizophoria tulliensis
  • †Schuchertella
  • †Scutellum
  • †Semicoscinium
  • †Semipora – tentative report
    • †Semipora ehlersi
  • †Serpulospira
    • †Serpulospira diversiformis
  • †Sigillaria
  • †Sinuites
  • †Spermatites
    • †Spermatites cylix
    • †Spermatites globosus
    • †Spermatites reticulatus
  • †Sphenophragmus
    • †Sphenophragmus nanus
  • Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum
    †Sphenophyllum
    • †Sphenophyllum bifurcatum
    • †Sphenophyllum cuneifolium
    • †Sphenophyllum emarginatum
    • †Sphenophyllum majus
    • †Sphenophyllum saxifragaefolium
  • †Sphenopteris
  • †Sphenopters
  • †Spinocyrtia
    • †Spinocyrtia clintoni
    • †Spinocyrtia euryteines – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Spinocyrtia granulosa
  • †Spinulicosta
    • †Spinulicosta mutocosta
    • †Spinulicosta spinulicosta
  • †Spinyplatyceras
    • †Spinyplatyceras bartlettense
  • †Spirifer – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Spirifer consors
  • †Spyroceras
  • †Stereotoechus
    • †Stereotoechus typicus – or unidentified comparable form
  • Life restorations of a male (foreground) and female (background) of the Late Devonian-Carboniferous Chimaera relative Stethacanthus
    †Stethacanthus
    • †Stethacanthus depressus
  • †Stictoporina
    • †Stictoporina granulifera
  • †Stigmaria
    • †Stigmaria verrucosa
  • †Stigmatella
  • †Stokesoceras[1]
    • †Stokesoceras engadinense – type locality for species[1]
    • †Stokesoceras gracile[1]
    • †Stokesoceras romingeri – type locality for species[1]
  • †Straparollus
    • †Straparollus mortoni – type locality for species
  • †Streblotrypa
    • †Streblotrypa anomala
    • †Streblotrypa hamiltonensis
  • †Streptelasm
    • †Streptelasm rusticum
  • †Streptelasma
    • †Streptelasma divaricans
    • †Streptelasma huronensis
  • †Striatopora
    • †Striatopora linneana
  • †Strobeus
    • †Strobeus alternatus
  • †Stromatocerium
    • †Stromatocerium huronense
  • †Stropheodonta
    • †Stropheodonta demissa – or unidentified comparable form
  • †Strophodonta
    • †Strophodonta demissa
  • Fossilized shell of the Ordovician-Silurian brachiopod Strophomena
    †Strophomena
    • †Strophomena alpenensis
    • †Strophomena costata
    • †Strophomena crassa
    • †Strophomena elongata
    • †Strophomena erratica
    • †Strophomena extenuata
    • †Strophomena heteromys
    • †Strophomena huronensis
    • †Strophomena inaequiradiata
    • †Strophomena levidensa
    • †Strophomena neglecta
    • †Strophomena nutans – or unidentified comparable form
    • †Strophomena parvula
    • †Strophomena pentagonia
    • †Strophomena planumbona
    • †Strophomena potterensis
    • †Strophomena sulcata
    • †Strophomena tenuicosta
    • †Strophomena titan
  • †Styliolina
    • †Styliolina fissurella
  • †Sulcoretepora
    • †Sulcoretepora deissi
    • †Sulcoretepora incisurata
    • †Sulcoretepora B – informal
  • Fossil of the Devonian tabulate coral Syringopora
    †Syringopora

T
  • †Technophorus
    • †Technophorus quincuncialis
  • Fossilized shell of the Early Ordovician-Late Devonian probable mollusc Tentaculites
    †Tentaculites
    • †Tentaculites bellulus
  • †Tetradella
    • †Tetradella regularis
    • †Tetradella subquadratus
  • †Tetradium
    • †Tetradium huronense
  • †Thamnopora
    • †Thamnopora alpenensis
    • †Thamnopora magniventra – type locality for species
  • †Thamnoptychia
    • †Thamnoptychia labyrinthica
    • †Thamnoptychia minuitissima
    • †Thamnoptychia silicensis
  • †Trematis
    • †Trematis rugosa
  • Restoration showing the top (left) and underside of the Late Ordovician trilobite Triarthrus
    †Triarthrus
    • †Triarthrus eatoni
  • †Trigonacarpolithus
    • †Trigonacarpolithus typicus
  • †Trigonocarpus – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Trigonocarpus Noeggerathi
  • †Trigonocarus
  • †Trimerella
  • †Trochonema
    • †Trochonema wartheni
  • †Tropidodiscus
    • †Tropidodiscus compticarinatus – type locality for species
  • †Tropidoleptus
    • †Tropidoleptus carinatus
  • †Truncalosia
    • †Truncalosia gibbosa
  • †Turbinilopsis
    • †Turbinilopsis anacarina – type locality for species
  • †Turbonitella
    • †Turbonitella trunculinoda
  • †Tylothyris
    • †Tylothyris subvaricosa

V
  • †Vanuxemia
    • †Vanuxemia noquerrwnaia
    • †Vanuxemia strattoni
  • †Vladanella
    • †Vladanella lirata – type locality for species

W
  • †Warrenella
    • †Warrenella laevis – or unidentified comparable form
  • †Whitfieldella
  • †Wisconsinella
    • †Wisconsinella clelandi – type locality for species

Z
  • †Zeilleria
    • †Zeilleria stellata
  • †Zygospira
    • †Zygospira modesta – or unidentified comparable form
gollark: no.
gollark: no.
gollark: no.
gollark: no.
gollark: No.

References
  1. Foerste, A. F. (1924). Silurian Cephalopods of northern Michigan (PDF).

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