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*These Lists Compiled Largely from Matthew (1909), O'Harra (1920), and Hay's bibliography and catalog of the Fossil Vertebrata of N. America U. S. G. S. Bulletin 1902, 1930.

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LOWER OLIGOCENE (TITANOTHERIUM ZONE)

Daphoenus dodgei (Scott)
Dinictis fortis (Adams)
Trigonias osborni (Lucas)
Leptaceratherium trigondum (Osborn & Wortman)
Caenopus cf. platycephalus (Osborn & Wortman)
Caenopus mitis (Cope)
Colodon occidentalis (Leidy)
Mesohippus proteulophus (Osborn)
Mesohippus hypostylus
Mesohippus celer (Marsh)
Titanotherium prouti (Leidy)
Titanotherium helocerus (Cope)
Titanotherium trigonoceras (Cope)
Megacerops dispar (Marsh)
Megacerops tichoceras (Scott & Osborn)
Megacerops robustus (Marsh)
Megacerops brachycephalus (Osborn)
Megacerops bicornutus (Osborn)
Megacerops marshi (Osborn)
Allops serotinus (Marsh)
Allops crassicornis (Marsh)
Allops amplus (Marsh)
Symborodon montanus (Marsh)
Symborodon copei (Osborn)
Brontotherium ramosum (Osborn)
Brontotherium dolichoceras (Scott & Osborn)
Brontotherium leidyi (Osborn)
Brontotherium hatcheri (Osborn)
Elotherium (Entelodon) crassum (Marsh)
Hypotamus (Anacodon) americanus (Leidy)
Merycoidodon hybridus (Leidy)
Merycoidodon affinis (Leidy)
Merycoidodon bullatus (Leidy)
Heteromeryx dispar (Matthew)

MIDDLE OLIGOCENE (OREODON ZONE)

Hyaenodon horridus (Leidy)
Hyaenedon cruentus (Leidy)
Hyaenodon crucians (Leidy)
Hyaenodon paucidens (Osborn & Wortman)
Hyaenodon leptocephalus (Scott & Osborn)
Hyaenedon mustelinus Scott)
Daphoenus vetus (Leidy)
Daphoenus hartshornianus (Cope)
Daphoenus felinus (Scott)
Daphoenus nebrascensis (Hatcher)
Daphoenus inflatus (Hatcher)
Cynodictus gregarius (Cope)
Cynodictus lippincottianus (Cope)
Dinictis felina (Leidy)
Dinictis squalidens (Cope)
Dinictis paucidens (Riggs)
Hoplophoneus primaevus (Leidy)
Hoplophoneus occidentalis (Leidy)
Hoplophoneus oreodontis (Cope)
Hoplophoneus marshi (Thorpe)
Hoplophoneus molussus (Thorpe)
Proterix loomisi (Matthew)
Leptictis haydeni (Leidy)
Ictops dakotensis (Leidy)
Ictops porcinus (Leidy)
Ictops bullatus (Matthew)
Protesorex crassus (Scott)
Eutypomys thomsoni (Matthew)
Ischyromys typus (Leidy)
Eumys elegans (Leidy)
Paleolagus haydeni (Leidy)
Palaeolagus haydeni (Leidy)
Palaeolagus turgidus
Hyracodon nebrascensis (Leidy)
Hyracodon major (Scott & Osborn)
Metamynodon planifrons (Scott & Osborn)
Caenopus occidentalis
Caenopus copei (Osborn)
Caenopus simplicidens (Cope)
Leptaceratherium trigonodum (Osborn & Wortman)
"Hyracodon" planiceps (Scott & Osborn)
Colodon procuspidatus (Osborn & Wortman)
Colodon dakotensis (Osborn & Wortman)
Colodon longipes (Osborn & Wortman)
Protapirus simplex (Wortman & Earle)
Mesohippus bairdi (Leidy)
Mesohippus obliquidens (Osborn)
Mesohippus trigonostylus (Osborn)
Elotherium mortoni (Leidy)
Elotherium ingens (Leidy)
Perchoerus probus (Leidy)
Perchoerus nanus (Marsh)
Anthracotherium curtum (Marsh)
Hypotamus rostratus (Scott)
Leptochoerus spectabilis (Leidy)
Leptochoerus gracilis (Marsh)
Stibarus quadricuspis (Hatcher)
Agriochoerus antiquus (Leidy)
Agriochoerus latifrons (Leidy)
Merycoidodon culbertsoni (Leidy)
Merycoidodon gracilis (Leidy)
Merycoidodon sp. cf bullatus (Leidy)
Hypertragulus calcaratus (Cope)
Leptomeryx evansi (Leidy)
Hypisodus minimus (Cope)
Hypisodus alacer (Troxell)
Poebrotherium wilsoni (Leidy)
Poebrotherium labiatum (Cope)
Poebrotherium andersoni (Traxell)
Paratylopus primaevus (Matthew)

UPPER OLIGOCENE

Cynodictis temnodon (Wortman & Matthew)
Dinictis bonbifrons (Adams)
Hoplophoneus insolens (Adams)
Eusmilus dakotensis (Hatcher)
Stenofiber nebrascensis (Leidy)
Agnocastor praeteraedens (Stirten) (in Manuscript)
Caenopus tridactylus (Osborn)
Caenopus platycephalus (Osborn & Wortman)
Protapirus obliquidens (Wortman & Earle)
Protapirus validus (Hatcher)
Mesohippus intermedius (Osborn & Wortman)
Mesohippus metulophus (Osborn)
Mesohippus brachystylus (Osborn)
Miohippus validus (Osborn)
Miohippus gidleyi (Osborn)
Miohippus crassicuspis (Osborn)
Colodon copei (Osborn & Wortman)
Elotherium cf ingens (Leidy)
Elotherium crassus (Marsh)
Elotherium bathrodon (Marsh)
Perchoerus robustus (Marsh)
Perchoerus platyops (Cope)
Anthracotherium karense (Osborn & Wortman)
Hyopotamus brachyrhynchus (Osborn & Wortman)
Agriochoerus major (Leidy)
Agriochoerus gaudryi (Osborn & Wortman)
Agriochoerus migrans (Marsh)
Eporeodon major (Leidy)
Eucrotaphus jacksoni (Leidy)
Protocecas comptus (Marsh)
Protocecas cristatus (Marsh)
Calops cristatus (Marsh)
Calops consors (Marsh)
Pseudolabis dakotensis (Matthew)

MIOCENE

Nothocyon gregorii (Matthew)
Nothocyon vulpinus (Matthew)
Nothocyon annectens (Peterson)
Nothocyon lemur (Cope)
Daphoenodon suporbus (Peterson)
Daphoenodon periculosus (Cook)
Mesocyon robustus (Matthew)
Enhyrocyon crassidens (Matthew)
Cynodesmus thomsoni (Matthew)
Cynodesmus minor (Matthew)
Temnocyon venator (Cooke)
Temnocyon percussor (Cook)
Borocyon robustum (Peterson)
Paroligobunis simplicidens (Peterson)
Oligobinis lepidus (Matthew)
Megalictis ferox (Matthew)
Aelurocyon brevifacies (Peterson)
Ninravus sectator (Matthew)
Arctoryctes terrenus (Matthew)
Euhapsis brachyceps (Peterson)
Paleocastor simplicidens
Stenofiber fossor (Peterson)
Stenofiber barbouri (Peterson)
Entopychus formosus (Matthew)
Entopychus curtus (Matthew)
Lepus primigenius (Matthew)
Lepus macrocephalus (Matthew)
Diceratherium cooki (Peterson)
Diceratherium niobrarensis (Peterson)
Diceratherium arikarensis (Barbour)
Diceratherium petersoni (Loomis)
Diceratherium shiffi (Loomis)
Metacaenopus egregius (Cook)
Metacaenopus stigeri (Loomis)
Epaiphelops virgasectus (Cook)
Moropus elatus (Marsh)
Moropus cooki (Barbour)
Moropus petersoni (Holland)
Moropus hollandi (Peterson)
Moropus matthewi (Holland & Peterson)
Moropus parvus (Barbour)
Miohippus equinanus (Osborn)
Miohippus gemmarosae (Osborn)
Parahippus pristinus (Osborn)
Parahippus pawniensis atavus (Osborn)
Parahippus nebrascensis primus (Osborn)
Parahippus aff crenidens (Scott)
Parahippus nebrascensis (Peterson)
Parahippus tyleri (Loomis)
Kalobatippus agatensis (Osborn)
Gomphotherium conodon (Cook)
Dinohyus hollandi (Peterson)
Desmathyus sioxensis (Peterson)
Desmathyus pinensis (Matthew)
Anacodon leptodus (Matthew)
Mesoreodon megalodon (Peterson)
Promerychoerus carrikeri (Peterson)
Promerychoerus vantasselensis (Peterson)
Phenacodoelus typus (Peterson)
Merychyus elegans (Leidy)
Merychyus harrisonensis (Peterson)
Merychyus minimus (Petersen)
Leptauchenia decora (Leidy)
Leptauchenia major (Leidy)
Leptauchenia nitida (Leidy)
Stenomylus gracilis (Peterson)
Stenomylus hitchcochi (Loomis)
Stenomylus crassipes (Loomis)
Protomeryx halli (Leidy)
Protomeryx cedrensis (Matthew)
Protomeryx leonardi (Loomis)
Oxydactylus longipes (Peterson)
Oxydactylus brachyceps (Peterson)
Oxydactylus longirostris (Peterson)
Oxydactylus lulli (Loomis)
Oxydactylus gibbi (Loomis)
Oxydactylus campestris (Cook)
Oxydactylus brachydontus (Peterson)
Syndoceras cooki (Barbour)
Hypertragulus calcaratus (Cope)
Blastomeryx advena (Matthew)
Blastomeryx primus (Matthew)
Blastomeryx olcotti (Matthew)

UPPER MIOCENE & PLIOCENE

Aelurodon saevus (Leidy)
Aelurodon haydeni (Leidy)
Ischyrocyon hyaendus (Matthew)
Potamotherium lacota (Matthew)
Lutra pristina (Matthew)
Eucastor tortus (Leidy)
Mylagaulus (Cope)
Aphelops brachyodus (Osborn)
Hypohippus affinis (Leidy)
Protohippus perditus (Leidy)
Protohippus placidus (Leidy)
Bliohippus supremus (Leidy)
Bliohippus pernix (Marsh)
Bliohippus simus (Gidley)
Procamelus occidentalis (Leidy)
Procamelus robustus (Leidy)
Blastomeryx wellisi (Matthew)
Blastomeryx marshi (Lull)
Aletomeryx gracilis (Lull)
Pliohippus lullianus (Troxell)
Pliohippus pernix (Marsh)
Pliohippus robustus (Marsh)
Pliohippus leidyanus (Osborn)