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

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

References

^ Naoki Kohno, Lawrence G. Barnes & Kiyoharu Hirota (1994). "Miocene fossil pinnipeds of the genera Prototaria and Neotherium (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 in Encyclopedia of Marine Mammals, eds. Perrin, William F., Bernd Würsig, and J. G. M. Thewissen. Academic Press.

Genera of pinnipeds 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

†Pacificotaria
†Pinnarctidion
†Pteronarctos

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↓

Otarioidea

†Desmatophocidae

Allodesmus
Atopotarus
Desmatophoca
Eodesmus

Odobenidae

†Archaeodobenus
†Imagotaria
†Kamtschatarctos
†Nanodobenus
†Neotherium
†Osodobenus
†Pelagiarctos
†Pontolis
†Proneotherium
†Prototaria
†Pseudotaria
†Titanotaria

Neodobenia

†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 Fossilworks: 72018 GBIF: 4941610 Open Tree of Life: 4941904
Neotherium	Wikidata: Q18001804 EoL: 4442163 Fossilworks: 36930 GBIF: 4833157 IRMNG: 1299256