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Neotherium

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Species of walrus (fossil)

Neotherium Temporal range:Middle Miocene PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Parvorder:	Pinnipedia
Family:	Odobenidae
Genus:	†Neotherium Kellogg, 1931
Species:	†N. mirum
Binomial name
†Neotherium mirum Kellogg, 1931

Neotherium mirum is anextinct species of basalwalrus.^[1]^[2] It was smaller than living forms and it did not have long tusks. Males were larger than females.

Palaeoecology

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Stable isotope evidence indicates that in the easternNorth Pacific,Neotherium had intermediate foraging habits between the nearshore specialistPithanotaria and the offshore specialistAllodesmus.^[3]

References

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^Naoki Kohno, Lawrence G. Barnes & Kiyoharu Hirota (1994). "Miocene fossil pinnipeds of the generaPrototaria andNeotherium (Carnivora; Otariidae; Imagotariinae) in the North Pacific Ocean: Evolution, relationships and distribution".The Island Arc.3 (4):285–308.Bibcode:1994IsArc...3..285K.doi:10.1111/j.1440-1738.1994.tb00117.x.
^Berta, Annalisa. 2002b. "Pinniped Evolution". InEncyclopedia of Marine Mammals, eds. Perrin, William F.,Bernd Würsig, and J. G. M.Thewissen. Academic Press.
^Valenzuela-Toro, Ana M.; Pyenson, Nicholas D.; Costa, Daniel P.; Clementz, Mark; Koch, Paul L. (1 September 2024)."Stable isotope evidence for resource partitioning in extinct marine carnivores".Palaeogeography, Palaeoclimatology, Palaeoecology.649 112302.doi:10.1016/j.palaeo.2024.112302. Retrieved12 November 2024 – via Elsevier Science Direct.

Genera ofpinnipeds and their stem-allies

Kingdom:Animalia
Phylum:Chordata
Class:Mammalia
Order:Carnivora
Suborder:Caniformia
Infraorder:Arctoidea

Pan-Pinnipedia

†Amphicynodontidae	Allocyon Amphicticeps Amphicynodon Drassonax Kolponomos Pachycynodon Parictis Wangictis
†Semantoridae	Necromites Potamotherium Puijila Semantor

Pinnipedimorpha

†Enaliarctos

Pinnipediformes

Pinnipedia

Phocidae

†Devinophoca

Monachinae

†Magnotherium
Monachini	†Afrophoca †Auroraphoca †Messiphoca Monachus Neomonachus †Eomonachus †Noriphoca †Palmidophoca †Pliophoca †Pontophoca †Pristiphoca †Terranectes
Miroungini	†Callophoca Mirounga
Lobodontini	†Acrophoca †Australophoca †Hadrokirus †Homiphoca Hydrurga Leptonychotes Lobodon Ommatophoca †Piscophoca †Properiptychus †Virginiaphoca

Phocinae

†Cryptophoca †Frisiphoca †Kawas †Leptophoca †Monachopsis †Monotherium †Phocanella †Prophoca †Sarmatonectes
Erignathini	Erignathus †Platyphoca
Cystophorini	Cystophora †Miophoca †Pachyphoca
Phocini	†Batavipusa †Gryphoca Halichoerus Histriophoca †Nanophoca Pagophilus Phoca †Planopusa †Praepusa Pusa

Otarioidea	see below↓

†Dusignathinae	Dusignathus Gomphotaria
Odobeninae	†Aivukus Odobenus †Ontocetus †Pliopedia †Protodobenus †Valenictus

Panotariidae

†Eotaria

Otariidae

Callorhinae

Callorhinus
†Pithanotaria

Otariinae

†Thalassoleon
Zalophini	Eumetopias †Oriensarctos †Proterozetes Zalophus
Otariini	Arctocephalus Arctophoca †Hydrarctos Neophoca Otaria Phocarctos

Lists
List of pinnipeds List of fossil pinnipedimorphs

Taxon identifiers
Neotherium mirum	Wikidata:Q31507 EoL:4442164 GBIF:4941610 Open Tree of Life:4941904 Paleobiology Database:72018
Neotherium	Wikidata:Q18001804 EoL:4442163 GBIF:4833157 IRMNG:1299256 Open Tree of Life:4941903 Paleobiology Database:36930

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