''Neotherium mirum'' is an extinct species of basal

walrus The walrus (''Odobenus rosmarus'') is a large pinniped, flippered marine mammal with a discontinuous distribution about the North Pole in the Arctic Ocean and subarctic seas of the Northern Hemisphere. The walrus is the only living species in ...

.Berta, Annalisa. 2002b
Pinniped Evolution
in ''Encyclopedia of Marine Mammals'', eds. Perrin, William F.,

Bernd Würsig Bernd Gerhard Würsig (born 9 November 1948 in Barsinghausen, Germany)"Bernd Gerhard Würsig". Marqui's Who's Who in the World. 2012. 29th Edition. is an educator and researcher who works mainly on aspects of behavior and behavioral ecology of ...

, and J. G. M. Thewissen. Academic Press. It was smaller than living forms and it did not have long tusks. Males were larger than females.

References

Miocene pinnipeds Prehistoric carnivoran genera Extinct mammals of North America Extinct mammals of Asia Odobenids Fossil taxa described in 1931 Taxa named by Remington Kellogg {{Paleo-carnivora-stub