| A (46 species) |
| Acinacodus - Lower Cretaceous |
| Acinonyx pardinensis - Early to Middle Pleistocene |
| Acristatherium - Early Cretaceous, 125 Ma |
| Acrophyseter - Late Miocene (Laventan-Montehermosan)~13.65-5.332 Ma |
| Adapis - Early - Late Eocene |
| Adelphailurus - Middle Miocene-Late Miocene |
| Adilophontes - Early Oligocene-Early Miocene |
| Aegyptopithecus - 35-33 Ma Late Eocene-Early Oligocene |
| Aelurodon - Middle Miocene-Late Miocene |
| Aepyceros datoadeni - Pliocene |
| Aetiocetus - Late Oligocene |
| Afrasia - Late Middle Eocene |
| Afrocyon - Miocene-Pliocene |
| Afrodon - Unavailable |
| Afropithecus - Miocene |
| Afrosmilus - Miocene, 16.9-9 Ma |
| Agnotherium - 17-11 Ma Early Miocene - Middle Miocene |
| Agorophius - Rupelian of the Oligocene |
| Agriotherium - Late Miocene-Gelasian |
| Aguascalientia - Miocene |
| Akidolestes - Early Cretaceous, 122 Ma |
| Albicetus - Langhian |
| Alphadon - Late Cretaceous |
| Ambulocetus - Early Eocene, 47.8-41.3 Ma |
| Amebelodon - Middle Miocene-Late Miocene |
| Amphicyanis - Unavailable |
| Amphicyon - Aquitanian-Pleistocene Early Miocene to Early Pleistocene |
| Anancus - Late Miocene-Early Pleistocene |
| Ancalecetus - Late Eocene |
| Anchitherium - Miocene [1] |
| Ancylotherium - 6.5-1.8 Ma Late Miocene to Early Pleistocene |
| Andrewsarchus - Middle Eocene, 48-41 Ma |
| Andrewsiphius - Eocene |
| Apterodon - Mid Eocene-Oligocene |
| Archaeoindris - Unavailable |
| Archaeolemur - Unavailable |
| Archaeotherium - Late Eocene to Early Oligocene,38-24.8 Ma |
| Arctamphicyon - Unavailable |
| Arctodus - Middle Pleistocene to Early Holocene, 1.8-0.010 Ma |
| Arsinoitherium - 36-27 Ma Late Eocene - Early Oligocene |
| Artiocetus - early Lutetian |
| Ashorocetus - Chattian |
| Astrapotherium - Early-Mid Miocene (Colhuehuapian-Laventan)~21.0-11.8 Ma |
| Astrohippus - 16.3-4.9 Ma Barstovian to Late Hemphillian[1] |
| Attockicetus - Eocene |
| Aulophyseter - Mid-Late Miocene~15.97-5.332 Ma |
| B (14 species) |
| Babakotia - Unavailable |
| Babiacetus - Middle Eocene |
| Baguatherium - Unavailable |
| Barbourofelis - Late Miocene-Pliocene 13.6-5.3 Ma |
| Barylambda - Middle Paleocene - Early Eocene, 60-50 Ma |
| Barytherium - Late Eocene-Early Oligocene |
| Basilosaurus - Late Eocene |
| Basiloterus - Late Eocene |
| Borhyaena - Early Miocene (Santacrucian)~17.5-15.5 Ma [1] |
| Borophagus - Middle Miocene to Late Pliocene, 12-2 Ma |
| Brachycyon - 23.3-7 Ma Early Miocene - Middle Miocene |
| Brachyhyops - Middle to Late Eocene |
| Branisella - Late Oligocene-Early Miocene (Deseadan)~29.0-21.0 Ma |
| Brygmophyseter - Miocene |
| C (30 species) |
| Cachiyacuy - Middle Eocene (Divisaderan)~41 Ma |
| Camelops - Late Pliocene to Early Holocene, 2.5-0.010 Ma |
| Canaanimys - Mid Eocene (Divisaderan)~41 Ma |
| Canis apolloniensis - Early Pleistocene 1.9-1.6 Ma |
| Canis armbrusteri - Middle Pleistocene-Late Pleistocene |
| Canis dirus - Late Pleistocene - early Holocene (125,000-9,000 years ago) |
| Canis edwardii - Blancan-Irvingtonian |
| Canis falconeri - Unavailable |
| Canis ferox - Late Miocene to Early Pliocene, 10.9-5.8 Ma |
| Canis lepophagus - Late Miocene-Early Pleistocene |
| Carolinacetus - Middle Eocene |
| Castoroides - Late Pliocene - Late Pleistocene, 3-0.011 Ma |
| Ceratogaulus - Late Miocene-Pleistocene |
| Cervalces - Pliocene-Pleistocene |
| Cetotherium - Miocene-Pliocene |
| Chalicotherium - Late Oligocene-Early Pliocene |
| Chilotherium - Late Miocene-Pliocene |
| Chonecetus - Oligocene |
| Chriacus - Early Paleocene-Early Eocene |
| Chrysocetus - Eocene |
| Coelodonta - 3.7-0.01 Ma Pliocene - Pleistocene |
| Coryphodon - Late Paleocene - Middle Eocene, 57-46 Ma |
| Crocuta crocuta spelaea - Middle to Late Pleistocene, 0.5-0.011 Ma |
| Cronopio - Late Cretaceous, 99.6-96 Ma |
| Crusafontia - Barremian |
| Cuvieronius - Pliocene-Holocene (Blancan-Rancholabrean (NALMA) & Montehermosan-Lujanian (SALMA)~4.9-0.0134 Ma |
| Cynelos - 23.3-7 Ma Early Miocene - Middle Miocene |
| Cynodictis - Late Eocene-Early Oligocene |
| Cynthiacetus - Late Eocene~37.2-33.9 Ma |
| Cypretherium - Chadronian |
| D (32 species) |
| Daeodon - 29-19 Ma Late Oligocene - Early Miocene |
| Damalborea - Middle Pliocene |
| Daphoenictis - Unavailable |
| Daphoenodon - Unavailable |
| Daphoenus - 42-16.3 Ma Middle Eocene-Early Miocene |
| Dawsonicyon - Middle Eocene |
| Deinogalerix - Late Miocene 10-5 Ma |
| Deinotherium - Middle Miocene-Early Pleistocene |
| Desmostylus - Oligocene-Miocene |
| Diacodexis - Early Eocene |
| Diadiaphorus - Early-Late Miocene (Santacrucian-Huayquerian)~17.5-6.8 Ma |
| Didelphodon - Late Cretaceous,[1] 73 Ma |
| Dilambdogale - 37.2 Ma Late Eocene |
| Dimaitherium - Priabonian Age, Upper Eocene Epoch |
| Dinaelurus - Late Eocene-Late Oligocene |
| Dinailurictis - Unavailable |
| Dinictis - Late Eocene to Early Miocene, 37.2-20.4 Ma |
| Dinocrocuta - Middle Miocene-Late Miocene |
| Dinofelis - Pliocene-Pleistocene, 5-1.2 Ma |
| Dinohippus - Late Miocene-Late Pliocene |
| Dinopithecus - Pliocene |
| Diorocetus - Miocene |
| Diprotodon - Pleistocene, 1.6-0.046 Ma |
| Dissopsalis - Middle Miocene-Late Miocene |
| Diunatans - Early Pliocene |
| Docodon - Upper Jurassic |
| Docofossor - Middle Jurassic |
| Doedicurus - Pleistocene-Holocene (Uquian-Lujanian)~2-0.011 Ma [note 1] |
| Dormaalocyon - Early Eocene |
| Dorudon - Late Eocene |
| Drassonax - Oligocene |
| Dryopithecus - 12-9 Ma Miocene |
| E (23 species) |
| Edworthia - 61.5 Ma Early Paleocene |
| Ekorus - Late Miocene (6 MYA) |
| Elasmotherium - Late Pliocene to Late Pleistocene, 2.588-0.029 Ma |
| Embolotherium - Late Eocene |
| Enaliarctos - Late Oligocene - Early Miocene, 24-22 Ma |
| Entelodon - 37.2-28.4 Ma Houldjinian-Rupelian |
| Eobasileus - Late Eocene |
| Eocetus - Middle Eocene |
| Eoentelodon - Middle Eocene |
| Eofelis - Eocene-Miocene |
| Eomaia - Early Cretaceous, 125 Ma |
| Eomanis - Early Eocene |
| Eomysticetus - Chattian |
| Epicyon - Early Miocene-Late Miocene |
| Epihippus - 46.2-38.0 Ma Early Uintan to Duchesnean[1] |
| Equus simplicidens - Middle Pliocene to Late Pleistocene |
| Eremotherium - Late Pliocene - Early Holocene, 4.9-0.011 Ma |
| Erlianomys - Early Eocene |
| Eucyon - Late Miocene- Late Pliocene, 10.3-3.6 Ma |
| Eurhinodelphis - Middle Miocene-Late Miocene |
| Euroamphicyon - Miocene |
| Eurotamandua - Early to Middle Eocene |
| Eusmilus - Late Eocene to Early Oligocene, 37.2-28.4 Ma |
| F (1 species) |
| Fruitafossor - Late Jurassic, Kimmeridgian-Tithonian |
| G (18 species) |
| Galadi - Oligocene - Miocene |
| Gandakasia - Early Eocene, 49 Ma |
| Ganguroo - 15-5 Ma Mid to Late Miocene |
| Gaviacetus - Middle Eocene |
| Georgiacetus - Middle Eocene |
| Gigantopithecus - Late Miocene to Mid Pleistocene~9-0.1 Ma |
| Ginsburgsmilus - Miocene |
| Glossotherium - Late Pliocene to Early Holocene, 2.5-0.010 Ma |
| Glyptodon - Pleistocene 2.500-0.011 Ma |
| Gnathabelodon - Middle Miocene-Late Miocene |
| Gobiatherium - Middle Eocene |
| Gobiconodon - Middle Jurassic-Late Cretaceous 166-94 Ma |
| Gomphotherium - Early Miocene-Early Pleistocene |
| Goupilictis - Unavailable |
| Gracilocyon - Early Eocene |
| Griphodon - Paleocene-Oligocene |
| Guangxicyon - 37-33 Ma Late Eocene |
| Guiomys - Mid Miocene (Laventan)~13.8-11.8 Ma |
| H (27 species) |
| Hadropithecus - Unavailable |
| Hapalops - Early-Late Miocene (Santacrucian-Huayquerian)~17.5-7.246 Ma |
| Haplocyon - Unavailable |
| Haplocyonoides - 20-16.9 Ma Late Eocene |
| Haplocyonopsis - Unavailable |
| Haramiyavia - Unavailable |
| Harpagophagus - Oligocene |
| Heishanobaatar - Early Cretaceous |
| Heliopithecus - Miocene16 Ma |
| Hemicyon - Early Miocene-Late Miocene |
| Hesperocyon - Late Eocene-Early Oligocene |
| Himalayacetus - Early Eocene, 53.5 Ma |
| Hipparion - Early Miocene to Pleistocene,[1] 23-0.781 Ma |
| Hippidion - Pliocene-Late Pleistocene (Montehermosan-Lujanian & Blancan)~5.332-0.009 Ma |
| Homalodotherium - Mid Miocene (Friasian)~16.3-15.5 Ma |
| Homotherium - Early Pliocene to Late Pleistocene, 4-0.012 Ma [1] |
| Hoplophoneus - Late Eocene to Early Oligocene 38-33.3 Ma |
| Hulitherium - Pleistocene |
| Hutegotherium - Middle Jurassic, 165 Ma |
| Hyaenodon - Late Eocene to Early Miocene, 42-15.9 Ma |
| Hydrodamalis - late Pliocene to Recent, 3.6-0 Ma |
| Hyotherium - Unavailable |
| Hypercoryphodon - Late Eocene, 37-34 Ma |
| Hypohippus - Unavailable |
| Hyrachyus - Eocene |
| Hyracodon - Middle Eocene-Late Oligocene |
| Hyracotherium - 55-45 Ma |
| I (8 species) |
| Icaronycteris - Early Eocene |
| Ictiocyon - Miocene |
| Ictitherium - Middle Miocene-Early Pliocene |
| Indarctos - Miocene |
| Indocetus - Middle Eocene |
| Indohyus - Middle Eocene |
| Iranotherium - Late Miocene |
| Ischyrocyon - Miocene |
| J (4 species) |
| Janjucetus - Late Oligocene |
| Jeholodens - Early Cretaceous, 125 Ma |
| Josephoartigasia - Early-Late Pliocene (Chapadmalalan)~4-3 Ma |
| Juramaia - Late Jurassic, 160.89-160.25 Ma |
| K (16 species) |
| Kabirmys - Late Eocene |
| Kalimantsia - 23.03-5.33 Ma Miocene |
| Kekenodon - Chattian of the Oligocene |
| Kenyapithecus - middle Miocene |
| Kharodacetus - Middle Eocene, 42 Ma |
| Khoratpithecus - Unavailable |
| Kielanobaatar - Early Cretaceous |
| Kimbetopsalis - - Middle Puercan, 65 Ma |
| Kogiopsis - Miocene |
| Kollikodon - Early Cretaceous |
| Komba - Early Miocene-Middle Miocene |
| Kubanochoerus - Miocene |
| Kuntinaru - Late Oligocene (Deseadan)~26.0 Ma |
| Kuri - Unavailable |
| Kutchicetus - Middle Eocene, 46-43 Ma |
| Kutchisiren - Miocene |
| L (9 species) |
| Leptalestes - Unavailable |
| Leptictidium - Middle Eocene, 50-35 Ma |
| Lestobradys - Late Miocene (Mayoan-Montehermosan)~11.6-5.4 Ma |
| Liaoconodon - Aptian, 120 Ma |
| Libycosaurus - Middle Miocene to Late Miocene |
| Livyatan - Tortonian (Chasicoan)~9.9-8.9 Ma (possible Zanclean occurrence) |
| Llanocetus - Priabonian |
| Lufengpithecus - Unavailable |
| Lycophocyon - Middle Eocene, 43-40 Ma |
| M (44 species) |
| Machaeroides - Eocene |
| Machairodus - Late Miocene to the Middle Pleistocene |
| Macrauchenia - Late Miocene-Late Pleistocene (Huayquerian-Lujanian)~7-0.01 Ma |
| Magericyon - Late Miocene 10-9 Ma |
| Maiacetus - Middle Eocene |
| Makaracetus - Early Middle Eocene |
| Mammacyon - Oligocene-Miocene |
| Mammalodon - Late Oligocene |
| Mammut - Early Oligocene through to the end of the Pleistocene/early Holocene |
| Mammuthus africanavus - Early Pliocene to Early Pleistocene |
| Mammuthus columbi - Mid Pleistocene-Early Holocene, 1.5-0.011 Ma |
| Mammuthus exilis - Late Pleistocene to Early Holocene, 0.06-0.011 Ma |
| Mammuthus meridionalis - 2.5-1.5 Ma Pleistocene |
| Mammuthus primigenius - Pleistocene - Early Holocene 0.15-0.004 Ma |
| Mammuthus subplanifrons - Early Pliocene |
| Mammuthus trogontherii - Mid Pleistocene |
| Maotherium - Early Cretaceous, 124.6 Ma |
| Masracetus - Late Eocene |
| Mauicetus - Late Oligocene. 24.2-23.6 Ma |
| Megacerops - Late Eocene 38-33.9 Ma |
| Megaladapis - Unavailable |
| Megaleptictis - Late Eocene |
| Megalictis - Miocene |
| Megaloceros - Late Pliocene to Late Pleistocene, 3-0.008 Ma |
| Megalonyx - late Miocene to Pleistocene, 10.3-0.011 Ma |
| Megantereon - Early Pliocene to Middle Pleistocene |
| Megatherium - Early Pliocene[1] to Early Holocene, 5-0.010 Ma Possible later date of 0.008 Ma |
| Megistotherium - early Miocene 23.03-11.61 Ma |
| Meherrinia - Late Miocene |
| Mendozahippus - Mid-Late Oligocene (Deseadan)~29-21 Ma |
| Merychippus - Miocene |
| Mesohippus - Middle Eocene - Early Oligocene |
| Mesonyx - Eocene |
| Mesopropithecus - Unavailable |
| Metaliomys - Late Miocene |
| Metridiochoerus - Late Pliocene to Early Pleistocene |
| Miacis - Late Paleocene-Late Eocene [1] |
| Miracinonyx - Late Pliocene to Late Pleistocene 2.6-0.011 Ma |
| Mitredon - Late Triassic |
| Mixocetus - Late Miocene, 11.6-10 Ma |
| Moeritherium - Late Eocene |
| Morawanocetus - Chattian |
| Moropus - Early Miocene, 23-13.6 Ma |
| Mylodon - Pleistocene to Holocene |
| N (12 species) |
| Nakalipithecus - 9.9-9.8 Ma |
| Nanolestes - Jurassic |
| Natchitochia - Middle Eocene |
| Necrolestes - Early Miocene (Santacrucian)~21.0-17.5 Ma |
| Neohelos - Miocene, 23-12 Ma |
| Neohipparion - Unavailable |
| Nidimys - Late Cretaceous |
| Nimravus - Oligocene, 33.3-26.3 Ma |
| Notharctus - Middle Eocene-Late Eocene |
| Nothrotheriops - Pleistocene, 2.6-0.011 Ma |
| Notoetayoa - Paleocene to Eocene |
| Nuralagus - Messinian-Pliocene |
| O (6 species) |
| Omoiosicista - Burdigalian, 17 Ma |
| Onychonycteris - 52.5 Ma Early Eocene |
| Oreopithecus - Miocene |
| Orohippus - early to middle Eocene[1] |
| Orycterocetus - Miocene |
| Ouranopithecus - Miocene |
| P (58 species) |
| Pakicetus - Early Eocene, 52-48 Ma |
| Palaeobalaena - Langhian of the Miocene |
| Palaeocastor - Late Oligocene to Early Miocene |
| Palaeochiropteryx - Middle Eocene |
| Palaeolagus - Oligocene[1] |
| Palaeomastodon - Late Eocene-Early Oligocene |
| Palaeopropithecus - Unavailable |
| Palaeotherium - Early to Middle Eocene |
| Paleoparadoxia - Miocene |
| Palorchestes - Miocene-Pleistocene |
| Panthera gombaszoegensis - Early to Middle Pleistocene |
| Panthera leo atrox - Pleistocene, 0.34-0.011 Ma |
| Panthera leo fossilis - Middle Pleistocene |
| Panthera leo spelaea - Middle Pleistocene to Early Holocene, 1.3-0.011 Ma |
| Pappocetus - Eocene |
| Paraceratherium - Oligocene, 34-23 Ma |
| Paradaphoenus - 33-6.9 Ma Early Oligocene-Early Miocene |
| Paraentelodon - Oligocene |
| Parahippus - Early Miocene |
| Paramylodon - late Pliocene to Pleistocene |
| Paritatodon - Bathonian-Callovian |
| Pelorovis - Late Pliocene-Holocene, 2.5-0.004 Ma |
| Peltephilus - Oligocene-Mid Miocene (Deseadan-Mayoan)~29.0-11.6 Ma |
| Percrocuta - Middle Miocene-Late Miocene |
| Phascolonus - Unavailable |
| Phiomia - Late Eocene-Early Oligocene~37-30 Ma |
| Phoberomys - Late Miocene (Huayquerian)~9.0-7.246 Ma |
| Pierolapithecus - Miocene |
| Piscobalaena - Mid-Late Miocene (Mayoan-Huayquerian & Clarendonian)~11.608-5.332 Ma |
| Platalearostrum - Middle Pliocene to Early Pleistocene |
| Platybelodon - Miocene, 15-10 Ma |
| Platygonus - Miocene to Pleistocene, 10.3-0.011 Ma |
| Plesiadapis - Late Paleocene-Early Eocene[1] |
| Plesiobalaenoptera - Late Miocene |
| Pliocyon - 20.6-13.6 Ma Early Oligocene-Early Miocene |
| Pliohippus - Mid Miocene |
| Pogonodon - Oligocene |
| Presbytherium - Paleocene |
| Priscakoala - Early Miocene |
| Proconsul - Miocene (23-5 MYA) |
| Procoptodon - Pleistocene |
| Propliopithecus - Mid Oligocene |
| Propyrotherium - Unavailable |
| Prosansanosmilus - Late Miocene |
| Prosqualodon - Late Oligocene-Early Miocene (Deseadan-Friasian)~28.4-16.0 Ma |
| Protemnocyon - Unavailable |
| Protemnodon - Pleistocene |
| Proticia - Early Eocene |
| Protictitherium - Miocene-Pliocene |
| Protocetus - Middle Eocene |
| Protypotherium - Miocene (Deseadan-Huayquerian)~23.03-6.8 Ma |
| Pseudamphicyon - 16.9-11.1 Ma Early Oligocene-Early Miocene |
| Pseudarctos - 16.9-11.1 Ma Early Oligocene-Early Miocene |
| Pseudocyon - 23.3-7 Ma Early Miocene - Middle Miocene |
| Pseudocyonopsis - 16.9-11.1 Ma Early Oligocene-Early Miocene |
| Pterodon - 37-28 Ma Late Eocene - Early Oligocene |
| Puijila - Late Oligocene - Early Miocene, 24-21 Ma |
| Pyrotherium - Oligocene (Deseadan)~28.4-23 Ma |
| Q (2 species) |
| Qaisracetus - Middle Eocene |
| Quercylurus - Early Oligocene |
| R (5 species) |
| Remingtonocetus - Middle Eocene, 45-43.5 Ma |
| Repenomamus - Early Cretaceous, 125-123.2 Ma |
| Rhizosmilodon - Early Pliocene |
| Rhynchippus - Late Oligocene (Deseadan)~28.4-23.03 Ma |
| Rodhocetus - Lutetian |
| S (20 species) |
| Saghacetus - Late Eocene |
| Samburupithecus - late Miocene |
| Sansanosmilus - Late Miocene |
| Sarcocyon - Unavailable |
| Sarkastodon - 35 Ma Late Eocene |
| Sineleutherus - Jurassic, Bathonian-Oxfordian |
| Sinobaatar - Early Cretaceous |
| Sinodelphys - Early Cretaceous, 125 Ma |
| Sinopa - Eocene-Early Oligocene |
| Sinotherium - Miocene-Pliocene |
| Sivapithecus - 12.5-8.5 Ma Miocene |
| Sivatherium - Pliocene to Holocene, 5-0.008 Ma |
| Smilodectes - 55-50 Ma Early Eocene |
| Smilodon - Early Pleistocene to Early Holocene, 2.5-0.01 Ma |
| Squalodon - Oligocene-Miocene |
| Stegomastodon - Pliocene-Late Pleistocene~4.9-0.03 Ma |
| Steropodon - Early Cretaceous |
| Sthenurus - Pleistocene |
| Stromerius - Late Eocene |
| Syrtosmilus - Late Miocene |
| T (20 species) |
| Takracetus - Middle Eocene |
| Teilhardina - 56-47 Ma Early Eocene - Middle Eocene |
| Teinolophos - Early Cretaceous |
| Telicomys - Late Miocene (Mayoan-Huayquerian)~11.608-7.246 Ma [1] |
| Temnocyon - Oligocene-Early Miocene |
| Theosodon - Early Miocene |
| Thylacoleo - late Pliocene-late Pleistocene |
| Thylacosmilus - Late Miocene-Piacenzian~9-3 Ma |
| Titanocetus - Serravallian |
| Titanoides - Late Paleocene, 59-56 Ma |
| Togocetus - 46-44 Ma |
| Tohoraata - Late Oligocene, 27.3-25.2 Ma |
| Tokarahia - Late Oligocene, 27.3-25.2 Ma |
| Tomarctus - early to middle Miocene 20.43-13.6 Ma |
| Toxodon - Late Miocene-Late Pleistocene (Mayoan-Lujanian)~11.6-0.011 Ma |
| Tranatocetus - Late Miocene, 9.6-8 Ma |
| Trigodon - Late Miocene-Pliocene (Mayoan-Montehermosan)~11.608-4.0 Ma |
| Tritemnodon - Eocene |
| Turkanapithecus - Miocene 28.4-11.61 Ma |
| Tylocephalonyx - 23.03-5.33 Ma Miocene |
| U (3 species) |
| Uintatherium - Eocene,45-37 Ma |
| Ursus arctos crowtheri - Unavailable |
| Ursus spelaeus - Middle to Late Pleistocene, 0.25-0.027 Ma |
| V (5 species) |
| Vampyrictis - Late Miocene |
| Victoriaceros - Middle Miocene, 15 Ma |
| Vintana - Maastrichtian~70.6 Ma |
| Vishnucyon - Unavailable |
| Viverra leakeyi - Late Miocene to Pleistocene |
| W (3 species) |
| Waipatia - Late Oligocene |
| Willungacetus - Oligocene |
| Witwatia - 37-33 Ma Eocene |
| X (5 species) |
| Xenohystrix - Early Miocene-recent |
| Xenokeryx - 15 Ma Miocene |
| Xenorophus - Oligocene |
| Xenosmilus - Irvingtonian |
| Xianshou - 160 Ma Oxfordian |
| Y (1 species) |
| Ysengrinia - Late Oligocene-Early Miocene |
| Z (6 species) |
| Zaglossus hacketti - Pleistocene |
| Zalambdalestes - Late Cretaceous |
| Zhangheotherium - Early Cretaceous, 125 Ma |
| Zygomaturus - Pleistocene |
| Zygophyseter - Tortonian |
| Zygorhiza - Late Eocene |