2012 in mammal paleontology

This article records new taxa of fossil mammals of every kind that have been described during the year 2012, as well as other significant discoveries and events related to paleontology of mammals that occurred in the year 2012.

List of years in mammal paleontology
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Newly named non-eutherian mammals

Name	Novelty	Status	Authors	Age	Unit	Location	Notes	Images
Abderites aisenense[1]	Sp. nov	Valid	Abello & Rubilar Rogers	Middle Miocene	Collón Cura Formation Río Frías Formation	Argentina  Chile	A marsupial, a member of Paucituberculata, a species of Abderites.
Condorodon[2]	Gen. et sp. nov	Valid	Gaetano & Rougier	Middle Jurassic	Cañadón Asfalto Formation	Argentina	An amphilestid. The type species is Condorodon spanios.
?Ectypodus riansensis[3]	Sp. nov	Valid	Vianey-Liaud in Marandat et al.	Earliest Eocene		France	A neoplagiaulacid multituberculate, possibly a species of Ectypodus.
Greniodon[4]	Gen. et sp. nov	Valid	Goin et al.	Eocene (early Lutetian)	Andesitas Huancache Formation	Argentina	A gondwanatherian. The type species is Greniodon sylvaticus.
Kouriogenys[5]	Gen. et comb. nov	Valid	Davis	Berriasian		United Kingdom	A peramuran mammal, a new genus for the species originally named Spalacotherium minus Owen 1871.
Peramuroides[5]	Gen. et sp. nov	Valid	Davis	Berriasian		United Kingdom	A peramuran mammal. The type species is Peramuroides tenuiscus.
Priscakoala[6]	Gen. et sp. nov	Valid	Black, Archer, & Hand	Miocene	Riversleigh World Heritage Area fossil deposit	Australia	A phascolarctid.
Thylacodon montanensis[7]	Sp. nov	Valid	Williamson et al.	Palaeocene		United States	A metatherian closely related to Swaindelphys and Herpetotheriidae, a species of Thylacodon.
Tjukuru[8]	Gen. et sp. nov	Valid	Prideaux & Tedford	Pliocene	Tirari Formation	Australia	A lagostrophine kangaroo. The type species is Tjukuru wellsi.

Eutherians

Research

• A phylogenetic analysis of living and fossil members of Carnivoramorpha is published by Michelle Spaulding and John J. Flynn (2012).[9]
• A study of fossil giant deers is published by I. A. Vislobokova (2012).[10]
• A study of the anatomy of skull and teeth of the proboscidean Eritherium azzouzorum is published by Emmanuel Gheerbrant, Baadi Bouya and Mbarek Amaghzaz (2012).[11]

New taxa

Name	Novelty	Status	Authors	Age	Unit	Location	Notes	Images
Acritophiomys[12]	Gen. et sp. nov	Valid	Sallam, Seiffert & Simons	Late Eocene		Egypt	A phiomorph. The type species is Acritophiomys bowni.
Adjidaumo lophatus[13]	Sp. nov	Valid	Korth	Eocene (Chadronian)		United States	An eomyid rodent, a species of Adjidaumo.
Aepyceros datoadeni[14]	sp nov	Valid	Geraads, Bobe & Reed	Pliocene	Hadar Formation	Ethiopia	A species of impala.
Afrasia[15]	Gen. et sp. nov	Valid	Chaimanee et al.	Eocene	Pondaung Formation	Myanmar	A primitive anthropoid. The type species is Afrasia djijidae.
Afrodon gheerbranti[16]	sp nov	Valid	De Bast, Sigé & Smith	Early Palaeocene	Hainin Formation	Belgium	An adapisoriculid, a species of Afrodon.
Aguascalientia minuta[17]	sp nov	Valid	Rincon, Bloch, Suarez, MacFadden & Jaramillo	Early Miocene	Las Cascadas Formation	Panama	A floridatraguline camelid, a species of Aguascalientia.
Aguascalientia panamaensis[17]	sp nov	Valid	Rincon, Bloch, Suarez, MacFadden & Jaramillo	Early Miocene	Las Cascadas Formation	Panama	A floridatraguline camelid, a species of Aguascalientia.
Ailuravus subita[18]	sp nov	Valid	Compte, Sabatier & Vianey-Liaud	Eocene (Bartonian)		France	An ischyromyid rodent, a species of Ailuravus.
Alloptox (Mizuhoptox) japonicus[19]	Subgen. and sp. nov	Valid	Tomida	Early Miocene		Japan	A pika, a species of Alloptox.
Alloptox katinkae[20]	sp nov	Valid	Angelone & Hír	Early Middle Miocene		Hungary	A pika, a species of Alloptox.
Anchilophus (Paranchilophus) jeanteti[21]	sp nov	Valid	Remy	Eocene (Bartonian)		France	A member of Palaeotheriidae, a species of Anchilophus.
Ancylotherium hellenicum[22]	Sp. nov	Valid	Koufos	Late Miocene		Greece	A chalicothere, a species of Ancylotherium.
Andemys[23]	Gen. et sp. nov	Valid	Bertrand et al.	Tinguirirican	Abanico Formation	Chile	A caviomorph rodent related to dasyproctids. The type species is Andemys termasi.
Apterodon langebadreae[24]	sp nov	Valid	Grohé et al.	Eocene (late Bartonian)		Libya	A hyaenodontid, a species of Apterodon.
Archaeophocaena[25]	Gen. et sp. nov.	Valid	Murakami et al.	Late Miocene	Koetoi Formation	Japan	A porpoise. The type species is Archaeophocaena teshioensis.
Babameryx[26]	Gen. et sp. nov	Valid	Mennecart et al.	Late Oligocene		Switzerland	A ruminant. The type species is Babameryx engesseri.
Bagacricetodon[27]	Gen. et sp. nov	Valid	Rodrigues, Marivaux & Vianey-Liaud	Oligocene		China	A cricetid rodent. The type species is Bagacricetodon tongi.
Barberapithecus[28]	Gen. et sp. nov	Valid	Alba & Moyà-Solà	Middle to Late Miocene		Spain	A crouzeliine pliopithecid. The type species is Barberapithecus huerzeleri.
Bartelsia[29]	Gen. et sp. nov	Valid	Gunnell	Early Eocene (earliest Bridgerian)		United States	A plesiadapiform, a relative of Uintasorex. The type species is Bartelsia pentadactyla.
Berrulestes[30]	Gen. et 3 sp. nov	Valid	Hooker & Russell	Paleocene		France	A macroscelidean. The type species is Berrulestes phelizoni; the other species are B. pellouini and B. poirieri.
Bohaskaia[31]	Gen. et sp. nov	Valid	Vélez-Juarbe & Pyenson	Early Pliocene	Yorktown Formation	United States	A monodontid. The type species is Bohaskaia monodontoides.
Bomburodon[32]	Nom. nov.	Valid	Williamson & Carr	Paleocene		United States	A replacement name for the condylarth genus Bomburia Van Valen, 1978.
Borisodon[33]	Gen. et comb. nov	Valid	Archibald & Averianov	Turonian		Kazakhstan	A zhelestid, a new genus for "Sorlestes" kara (Nessov, 1993).
Bustylus folieae[16]	sp nov	Valid	De Bast, Sigé, & Smith	Early Palaeocene	Hainin Formation	Belgium	An adapisoriculid, a species of Bustylus.
Cachiyacuy[34]	Gen. and 2 sp. nov	Valid	Antoine et al.	Eocene (latest Lutetian, approx. 41 Ma)	Yahuarango Formation	Peru	A caviomorph rodent. Genus contains two species: Cachiyacuy contamanensis and Cachiyacuy kummeli.
Canaanimys[34]	Gen. and sp. nov	Valid	Antoine et al.	Eocene (latest Lutetian, approx. 41 Ma)	Yahuarango Formation	Peru	A caviomorph rodent. The type species is Canaanimys maquiensis.
Canis arnensis kudarensis[35]	Subsp. nov	Valid	Baryshnikov	Middle Pleistocene		South Ossetia	A small coyote-like canid, a subspecies of Canis arnensis.
Canis lupus maximus[36]	Subsp. nov.	Valid	Boudadi-Maligne	Late Pleistocene		France	A subspecies of gray wolf.
Carposorex burkarti[37]	sp nov	Valid	Hugueney, Mein & Maridet	Miocene		France	A shrew, a species of Carposorex.
Centimanomys gigantus[13]	Sp. nov	Valid	Korth	Eocene (Chadronian)		United States	An eomyid rodent, a species of Centimanomys.
Chubutomys navaensis[38]	sp nov	Valid	Pérez, Krause & Vucetich	Late Oligocene	Sarmiento Formation	Argentina	A member of Hystricognathi, a cavioid rodent; a species of Chubutomys.
Colpodon antucoensis[39]	sp nov	Valid	Shockey et al.	Miocene	Cura-Mallín Formation	Chile	A leontiniid notoungulate, a species of Colpodon.
Coryphodon pisuqti[40]	Sp. nov	Valid	Dawson	Wasatchian	Margaret Formation	Canada	A pantodont, a species of Coryphodon.
Cristadjidaumo skinneri[41]	sp nov	Valid	Emry & Korth	Late Eocene	White River Formation	United States	An eomyid, a species of Cristadjidaumo.
Dakotallomys whitei[42]	Sp. nov	Valid	Korth	Oligocene (Orellan)	Dunbar Creek Formation	United States	An aplodontiid rodent belonging to the subfamily Prosciurinae.
Damalborea grayi[14]	sp nov	Valid	Geraads, Bobe & Reed	Pliocene	Hadar Formation	Ethiopia	A member of Alcelaphini.
Damaliscus hypsodon[43]	Sp. nov	Valid	Faith et al.	Middle Pleistocene		Kenya  Tanzania	An alcelaphine bovid, a species of Damaliscus.
Dasychoerus natrunensis[44]	Sp. nov	Valid	Pickford	Late Miocene to early Pliocene		Egypt	A suid, a species of Dasychoerus (considered by some authors to be a subgenus of the genus Sus).
Dryomomys dulcifer[45]	sp nov	Valid	Chester & Beard	Late Paleocene	Big Multi Quarry	United States	A micromomyid plesiadapiform, a species of Dryomomys.
Dushimys[46]	Gen. et sp. nov	Valid	Zijlstra	Quaternary, probably middle Pleistocene		Curaçao	An oryzomyine sigmodontine rodent. The type species is Dushimys larsi.
Elmerriggsia[39]	Gen. et sp. nov	Valid	Shockey et al.	Late Oligocene		Argentina	A leontiniid notoungulate. The type species is Elmerriggsia fieldia.
Eotheroides clavigerum[47]	sp nov	Valid	Zalmout & Gingerich	Eocene (Priabonian)	Birket Qarun Formation	Egypt	A dugongid sirenian, a species of Eotheroides.
Eotheroides sandersi[47]	sp nov	Valid	Zalmout & Gingerich	Eocene (Priabonian)	Birket Qarun Formation	Egypt	A dugongid sirenian, a species of Eotheroides.
Eotmantsoius[48]	Gen. et sp. nov	Valid	Tabuce et al.	Middle or Late Eocene		Libya	A member of Macroscelidea. The type species is Eotmantsoius perseverans.
Eoviscaccia frassinettii[23]	Sp. nov	Valid	Bertrand et al.	Tinguirirican	Abanico Formation	Chile	A caviomorph rodent related to chinchillids, a species of Eoviscaccia.
Epipeltephilus kanti[49]	sp nov	Valid	González Ruiz et al.	Late Miocene (Chasicoan)	Arroyo Chasicó Formation	Argentina	A peltephilid cingulate, a species of Epipeltephilus.
Eptenonnus[50]	Gen. et sp. nov	Valid	Rosina & Semenov	Late Miocene		Ukraine	A vesper bat. The type species is Eptenonnus gritsevensis.
Eucricetodon bagus[27]	Sp. nov	Valid	Rodrigues, Marivaux & Vianey-Liaud	Oligocene		China	A cricetid rodent, a species of Eucricetodon.
Eucricetodon jilantaiensis[27]	Sp. nov	Valid	Rodrigues, Marivaux & Vianey-Liaud	Oligocene		China	A cricetid rodent, a species of Eucricetodon.
Gandheralophus[51]	Gen. et sp. nov	Valid	Missiaen & Gingerich	Early Eocene	Ghazij Formation	Pakistan	An isectolophid tapiromorph. Its species are G. minor and G. robustus.
Gazella harmonae[14]	sp nov	Valid	Geraads, Bobe & Reed	Pliocene	Hadar Formation	Ethiopia	A species of gazelle.
Geotrypus minor[52]	sp nov	Valid	Ziegler	Early Oligocene		Germany	A talpid. Originally described as a species of Geotrypus; subsequently transferred to the separate genus Tegulariscaptor.[53]
Gigarton[30]	Gen. et 3 sp. nov	Valid	Hooker & Russell	Paleocene		France	A macroscelidean. The type species is Gigarton meyeri; the other species are G. sigogneauae and G. louisi.
Gobiolagus aliwusuensis[54]	Sp. nov	Valid	Fostowicz-Frelik et al.	Middle Eocene		China	A palaeolagid lagomorph, a species of Gobiolagus.
Hanakia agadjaniani[55]	sp nov	Valid	Rosina & Rummel	Early Miocene		Germany	A vesper bat, a species of Hanakia.
Hesperogaulus shotwelli[56]	sp nov	Valid	Calede & Hopkins	Miocene		United States	A mylagaulid, a species of Hesperogaulus.
Holmesina rondoniensis[57]	sp nov	Valid	Góis et al.	Late Pleistocene	Rio Madeira Formation	Brazil	A pampatheriid cingulate, a species of Holmesina.
Indusomys[58]	Nom. nov	Valid	Gunnell et al.	Eocene		Pakistan	A replacement name for the primate genus Indusius Gunnell, Gingerich, Ul-Haw, Bloch, Kahn and Clyde, 2008.
Kretzoiartcos[59]	Gen. et comb. nov	Valid	Abella et al.	Middle Miocene	Calatayud-Daroca Basin	Spain	An ailuropodine bear, a new genus for "Agriarctos" beatrix Abella, Montoya & Morales (2011).
Kurdalagonus[60]	Gen. et sp. nov	Valid	Tarasenko & Lopatin	Miocene	Blinovo Formation	Russia	A baleen whale belonging to the family Cetotheriidae. The type species is Kurdalagonus mchedlidzei. Tarasenko & Lopatin (2012) originally assigned the new species K. adygeicus, as well as the species "Cetotherium" maicopicum Spasskii, 1951 to the genus Kurdalagonus as well;[60] however, Gol'din & Startsev (2016) excluded K. adygeicus from the genus and stated that "C." maicopicum requires further research to determine its phylogenetic affinities.[61]
Lainodon ragei[62]	Sp. nov.	Valid	Gheerbrant & Astibia	Late Cretaceous (Campanian or Maastrichtian)		Spain	A zhelestid, a species of Lainodon.
Leptacodon donkroni[63]	sp nov	Valid	Rose et al.	Earliest Eocene	Willwood Formation	United States	A nyctitheriid soricomorph, a species of Leptacodon.
Leptophoca amphiatlantica[64]	sp nov	Disputed	Koretsky, Ray & Peters	Miocene	Breda Formation Calvert Formation St Mary's Formation	Netherlands  United States	An earless seal. Dewaele, Lambert & Louwye (2017) considered this species to be nomen dubium.[65]
Litolophus ghazijensis[51]	Species	Valid	Missiaen & Gingerich	Early Eocene	Ghazij Formation	Pakistan	An eomoropid chalicotherioid, a species of Litolophus.
Louisina marci[30]	sp nov	Valid	Hooker & Russell	Paleocene		France	A macroscelidean, a species of Louisina.
Megaleptictis[66]	Gen. et sp. nov	Valid	Meehan & Martin	Chadronian/?Orellan	White River Group	United States	A large leptictid.
Megalomys georginae[67]	Sp. nov	Valid	Turvey, Brace & Weksler	?Late Pleistocene–late Holocene		Barbados	A rice rat, a species of Megalomys.
Meherrinia[68]	Gen. et sp. nov	Valid	Geisler, Godfrey 7 Lambert	Late Miocene	Eastover Formation	United States	A river dolphin.
Melaneremia schrevei[69]	Sp. nov	Valid	Hooker	Eocene (earliest Ypresian)	Woolwich Formation	United Kingdom	A microchoerine omomyid primate, a species of Melaneremia.
Mesonyx nuhetingensis[70]	Sp. nov	Valid	Jin	Early Eocene	Arshanto Formation	China	A mesonychid, a species of Mesonyx.
Metanchilophus[21]	Gen. et comb. et 2 sp. et. subsp. nov	Valid	Remy	Eocene		France   Switzerland  United Kingdom	A member of Palaeotheriidae. A new genus for "Anchilophus" dumasi; genus also contains "Anchilophus" radegondensis, "Anchilophus" gaudini (including new subspecies Metanchilophus gaudini fontensis) and "Anchilophus" depereti, as well as new species Metanchilophus castrensis and Metanchilophus chaubeti.
Metanoiamys paradoxus[41]	Species	Valid	Emry & Korth	Late Eocene	White River Formation	United States	An eomyid, a species of Metanoiamys.
Miocaperea[71]	Gen. et sp. nov	Valid	Bisconti	Miocene	Pisco Formation	Peru	A neobalaenid (a relative of pygmy right whale). The type species is Miocaperea pulchra.
Miophocaena[25]	Gen. et sp. nov.	Valid	Murakami et al.	Late Miocene	Koetoi Formation	Japan	A porpoise. The type species is Miophocaena nishinoi.
Miostrellus petersbuchensis[55]	sp nov	Valid	Rosina & Rummel	Early Miocene		Germany	A vesper bat, a species of Miostrellus.
Morlodon[72]	Gen. et sp. nov	Valid[73]	Solé	Early Eocene		Europe	A proviverrine hyaenodontid. The type species is Morlodon vellerei.
Mylagaulus cornusaulax[74]	sp nov	Valid	Czaplewski	Late Miocene		United States	A mylagaulid rodent.
Myotis korotkevichae[50]	Sp. nov	Valid	Rosina & Semenov	Late Miocene		Ukraine	A mouse-eared bat.
Namatomys erythrus[41]	sp nov	Valid	Emry & Korth	Late Eocene	White River Formation	United States	An eomyid, a species of Namatomys.
Nanomomys[63]	Gen. et sp. nov	Valid	Rose et al.	Earliest Eocene	Willwood Formation	United States	A plesiadapiform, a possible member of Microsyopidae. The type species is Nanomomys thermophilus.
Nementchatherium rathbuni[48]	Sp. nov	Valid	Tabuce et al.	Middle or Late Eocene		Libya	A member of Macroscelidea, a species of Nementchatherium.
Neophiomys[75]	Gen. et comb. nov	Valid	Coster et al.	Early Oligocene		Libya	A rodent, a member of Hystricognathi; a new genus for "Phiomys" paraphiomyoides Wood, 1968.
Nesiotites rafelinensis[76]	sp nov	Valid	Rofes et al.	Early Pliocene		Spain	A shrew, a species of Nesiotites. Argued by different authors to be either a probable junior synonym of Nesiotites ponsi[77] or a valid and distinct species.[78]
Nestoritherium linxiaense[79]	sp nov	Valid	Chen, Deng, He & Chen	Early Late Miocene	Liushu Formation	China	A chalicothere, a species of Nestoritherium.
Omanitherium[80]	Gen. et sp. nov	Valid	Seiffert et al.	Earliest Oligocene (earliest Rupelian)	Ashawq Formation	Oman	A proboscidean, a relative of Barytherium. The type species is Omanitherium dhofarensis.
Pappocricetodon neimongolensis[81]	Sp. nov	Valid	Li	Middle Eocene	Irdin Manha Formation	China	A cricetid rodent, a species of Pappocricetodon.
Parastegosimpsonia[82]	Gen. et sp. nov	Valid[83]	Ciancio et al.	Paleogene (?Eocene)		Peru	An astegotheriine dasypodid armadillo. The type species is Parastegosimpsonia peruana; genus might contain a second, yet-unnamed species.
Pardinamys[84]	Gen. et sp. nov	Valid	Ortiz, Jayat & Steppan	Late Pliocene (Uquian)	Uquía Formation	Argentina	A phyllotine sigmodontine rodent. The type species is Pardinamys humahuaquensis.
Paromomys libedianus[85]	sp nov	Valid	Silcox & Williamson	Early Paleocene (Torrejonian)	Nacimiento Formation	United States	A paromomyid plesiadapiform, a species of Paromomys.
Paschatherium levei[30]	sp nov	Valid	Hooker & Russell	Early Eocene		France	A macroscelidean, a species of Paschatherium.
Phiocricetomys atavus[75]	Sp. nov	Valid	Coster et al.	Early Oligocene		Libya	A rodent, a member of Hystricognathi; a species of Phiocricetomys.
Plagioctenoides tombowni[63]	sp nov	Valid	Rose et al.	Earliest Eocene	Willwood Formation	United States	A nyctitheriid soricomorph, a species of Plagioctenoides.
Platychoerops antiquus[86]	Sp. nov	Valid	Boyer, Costeur & Lipman	Paleocene		France	A plesiadapid, a species of Platychoerops.
Platygonus pollenae[87]	Sp. nov	Valid	Prothero & Grenader	Late Miocene (Hemphillian)		United States	A peccary, a species of Platygonus.
Plecotus schoepfelii[55]	sp nov	Valid	Rosina & Rummel	Early Miocene		Germany	A vesper bat, a species of Plecotus.
Plesiodipus wangae[27]	Sp. nov	Valid	Rodrigues, Marivaux & Vianey-Liaud	Oligocene		China	A cricetid rodent, a species of Plesiodipus.
Plesiotypotherium casirense[88]	Sp. nov	Valid	Cerdeño et al.	Late Miocene		Bolivia	A mesotheriid notoungulatan, a species of Plesiotypotherium.
Pristifelis[89]	Gen. et comb. nov	Valid	Salesa et al.	Miocene		Western Eurasia	A feline felid, a new genus for Felis attica.
Prodendrogale engesseri[90]	sp nov	Valid	Ni & Qiu	Late Miocene		China	A treeshrew, a species of Prodendrogale.
Proeggysodon[91]	Gen. et sp. nov	Valid	Bai & Wang	Late Eocene	Possibly Ulan Gochu Formation	China	An odd-toed ungulate, an eggysodontine rhinocerotoid. The type species is Proeggysodon qiui.
Prolouisina[30]	Gen. et comb. nov	Valid	Hooker & Russell	Paleocene		Germany	A macroscelidean, a new genus for "Louisina" atavella (Russell, 1964).
Proremiculus[16]	Gen. et sp. nov	Valid	De Bast, Sigé & Smith	Early Palaeocene	Hainin Formation	Belgium	An adapisoriculid. Its type species is Proremiculus lagnauxi.
Protictitherium thessalonikensis[92]	sp nov	Valid	Koufos	Late Miocene		Greece	An ictitheriine hyena, a species of Protictitherium.
Pseudocricetops[27]	Gen. et sp. nov	Valid	Rodrigues, Marivaux & Vianey-Liaud	Oligocene		China	A cricetid rodent. The type species is Pseudocricetops matthewi.
Pseudoloris cuestai[93]	sp nov	Valid	Minwer-Barakat, Marigó & Moyà-Solà	Middle Eocene		Spain	A microchoerine omomyid, a species of Pseudoloris.
Pterophocaena[94]	Gen. et sp. nov.	Valid	Murakami et al.	Late Miocene	Wakkanai Formation	Japan	A porpoise. The type species is Pterophocaena nishinoi.
Pucatherium[95]	Gen. et sp. nov	Valid	Herrera, Powell & Del Papa	Middle–late Eocene	Casa Grande Formation Geste Formation Lumbrera Formation Quebrada de los Colorados Formation	Argentina	An armadillo of uncertain phylogenetic placement. The type species is Pucatherium parvum.[96]
Remys major[18]	Sp. nov	Valid	Compte, Sabatier & Vianey-Liaud	Eocene (Bartonian)		France   Switzerland	A theridomyid rodent, a species of Remys.
Sinomastodon jiangnanensis[97]	Sp. nov	Valid	Wang et al.	Early Pleistocene		China	A gomphothere, a species of Sinomastodon.
Skouraia[98]	Gen. et sp. nov	Valid	Geraads, El Boughabi & Zouhri	Late Miocene	Aït Kandoula Formation	Morocco	A caprin bovid. The type species is Skouraia helicoides.
Styriofelis vallesiensis[89]	sp nov	Valid	Salesa et al.	Late Miocene		Spain	A feline felid. Originally described as a species of Styriofelis, but subsequently transferred to the separate genus Leptofelis.[99]
Sulaimanius[58]	Nom. nov	Valid	Gunnell et al.	Eocene		Pakistan	A replacement name for the primate genus Sulaimania Gunnell, Gingerich, Ul-Haw, Bloch, Kahn and Clyde, 2008.
Sylvochoerus[100]	Gen. et sp. nov	Valid	Frailey & Campbell	Late Miocene	Madre de Dios Formation	Western Amazon Basin	A peccary. The type species is Sylvochoerus woodburnei.
Tachyoryctoides engesseri[101]	sp nov	Valid	Wang & Qiu	Early Miocene	Lanzhou Basin	China	A muroid rodent, a species of Tachyoryctoides.
Tachyoryctoides minor[101]	sp nov	Valid	Wang & Qiu	Early Miocene	Lanzhou Basin	China	A muroid rodent, a species of Tachyoryctoides.
Tardenomys[18]	Gen. et sp. nov	Valid	Compte, Sabatier & Vianey-Liaud	Eocene (Bartonian)		France   Switzerland	A theridomyid rodent. The type species is Tardenomys chartreuvensis.
Teilhardimys brisswalteri[30]	sp nov	Valid	Hooker & Russell	Paleocene		France	A macroscelidean, a species of Teilhardimys.
Teilhardina gingerichi[63]	Sp. nov	Disputed	Rose et al.	Earliest Eocene	Willwood Formation	United States	An omomyid primate, a species of Teilhardina. Considered to be a junior synonym of Teilhardina brandti by Morse et al. (2019).[102]
Thryptodon[30]	Gen. et sp. nov	Valid	Hooker & Russell	Paleocene		France	A macroscelidean. The type species is Thryptodon brailloni.
Tinimomys tribos[45]	sp nov	Valid	Chester & Beard	Late Paleocene	Big Multi Quarry	United States	A micromomyid plesiadapiform, a species of Tinimomys.
Tragomys[103]	Gen. et sp. nov	Valid	Agusti, Bover & Alcover	Pliocene		Spain	A cricetid rodent. The type species is Tragomys macpheei.
Tupaia storchi[90]	sp nov	Valid	Ni & Qiu	Late Miocene		China	A treeshrew, a species of Tupaia.
Turkanamys[104]	Gen. et sp. nov	Valid	Marivaux et al.	Late Oligocene		Kenya	A phiomorph rodent. The type species is Turkanamys hexalophus.
Tuscahomys walshi[105]	Sp. nov	Valid	Anemone, Dawson & Beard	Early Eocene (late early Wasatchian)		United States	A cylindrodontid rodent, a species of Tuscahomys.
Tuscahomys worlandensis[63]	Sp. nov	Valid	Rose et al.	Earliest Eocene	Willwood Formation	United States	A cylindrodontid rodent, a species of Tuscahomys.
Vampalus[106]	Gen. et sp. et comb. nov	Valid	Tarasenko & Lopatin	Miocene		Russia	A cetotheriid baleen whale belonging to the subfamily Herpetocetinae. The type species is Vampalus sayasanicus from Chechnya; genus also contains "Cetotherium" helmerseni Brandt, 1871 from Krasnodar Krai.
Vasseuromys cristinae[107]	sp nov	Valid	Ruiz-Sánchez et al.	Middle Miocene		Spain	A dormouse, a species of Vasseuromys.
Vasseuromys rambliensis[108]	sp nov	Valid	Ruiz-Sánchez et al.	Lower Miocene		Spain	A dormouse, a species of Vasseuromys.
Victoriaceros[109]	Gen. et sp. nov	Valid	Geraads, McCrossin & Benefit	Middle Miocene	Makobo beds	Kenya	An elasmotheriine rhinoceros. Type species is Victoriaceros kenyensis.
Victoriamys[110]	Gen. et comb. nov	Valid	Martin	Pleistocene		Italy  Spain	A vole, a new genus for the species "Allophaiomys" chalinei.
Viretia[37]	Gen. et comb. nov	Valid	Hugueney, Mein and Maridet	Miocene		France  Slovakia	A shrew, a new genus for "Sorex" gracilidens.
Walbeckodon[30]	Gen. et 2 sp. nov	Valid	Hooker & Russell	Paleocene		France  Germany	A macroscelidean. The type species is Walbeckodon krumbiegeli; the second species is Walbeckodon girardi.
Waldochoerus[100]	Gen. et sp. nov	Valid	Frailey & Campbell	Late Miocene		Western Amazon Basin	A peccary. The type species is Waldochoerus bassleri.
Witenia yolua[27]	Sp. nov	Valid	Rodrigues, Marivaux & Vianey-Liaud	Oligocene		China	A cricetid rodent, a species of Witenia.
Witwatia sigei[111]	Sp. nov	Valid	Ravel et al.	Early Eocene		Tunisia	A philisid bat, a species of Witwatia.
Yamatocetus[112]	Gen. et sp. nov	Valid	Okazaki	Late Oligocene	Jinnobaru Formation	Japan	An eomysticetid baleen whale. The type species is Yamatocetus canaliculatus.
Yuruatherium[82]	Gen. et sp. et comb. nov	Valid[83]	Ciancio et al.	Paleogene (including Eocene)		Argentina  Peru	A member of Cingulata of uncertain phylogenetic placement, similar to Machlydotherium and Eocoleophorus. The type species is Paleogene (?Eocene) Yuruatherium tropicalis; genus also contains Eocene (Mustersan) "Machlydotherium" intortum Ameghino.

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