page_title: List of fossil pinnipeds
section_title: Otarioidea J. E. Gray, 1821
hierarchical_section_title: List of fossil pinnipeds / Pinnipeds / Otarioidea J. E. Gray, 1821
caption_attribution_description: Reconstruction of Archaeodobenus akamatsui by Tatsuya Shinmura (Ashoro Museum of Paleontology).
context_page_description: Pinnipeds are marine mammals that evolved from arctoid carnivorans that includes seals, eared seals, and walruses. There are 34 recent species of pinnipeds and 102 species of fossil pinnipeds and their stem-relatives. Scientists still debate on which lineage of arctoid carnviroans are the closest relatives to the pinnipedimorphs, being either more closely related to bears or to musteloids. Two stem-pinniped families found outside of Pinnipedimorpha, Amphicynodontidae and Semantoridae, were in the past considered to be subfamilies of Ursidae and Mustelidae respectively. In comparison to the two other major groups or marine or sea mammals, cetaceans and sirenians, pinnipeds are a relatively younger group having appeared about 24 to 38 million years ago and are still able to return on land to breed.
  The list of fossil taxa is based on mostly the historiographical data from Valenzuela-Toro and Pyenson. The two stem-pinniped arctoid families Amphicynodontidae and Semantoridae are included here as well, although neither family are members of Pinnipedimorpha.
context_section_description: †Desmatophocidae Hay, 1930
  †Allodesminae Mitchell, 1968
  †Atopotarus Downs, 1956
  †Atopotarus courseni Downs, 1956
  †Allodesmus Kellogg, 1922
  †Allodesmus packardi Barnes, 1972
  †Allodesmus uraiporensis Tonomori et al., 2018
  †Allodesmus naorai Kohno, 1996
  †Allodesmus sinanoensis Nagao, 1941
  †Allodesmus demerei Boessenecker & Churchill, 2018
  †Allodesmus kernensis Kellogg, 1922
  †Desmatophocinae Hay, 1930
  †Desmatophoca Condon, 1906
  †Desmatophoca brachycephala Barnes, 1987
  †Desmatophoca oregonensis Condon, 1906
  Odobenidae J. A. Allen, 1880
  †Prototaria Takeyama & Ozawa, 1984
  †Prototaria planicephala Kohno, 1994
  †Prototaria primigena Takeyama & Ozawa, 1984
  †Proneotherium Kohno et al., 1995
  †Proneotherium repenningi Kohno et al., 1995
  †Neotherium Kellogg, 1931
  †Neotherium mirum Kellogg, 1931
  †Kamtschatarctos Dubrovo, 1981
  †Kamtschatarctos sinelnikovae Dubrovo, 1981
  †Pseudotaria Kohno, 2006
  †Pseudotaria muramotoi Kohno, 2006
  †Archaeodobenus Tanaka & Kohno, 2015
  †Archaeodobenus akamatsui Tanaka & Kohno, 2015
  †Nanodobenus Velez & Salinas-Marquez, 2018
  †Nanodobenus arandai Velez & Salinas-Marquez, 2018
  †Pelagiarctos Barnes, 1988
  †Pelagiarctos thomasi Barnes, 1988
  †Titanotaria Magallanes et al., 2018
  †Titanotaria orangensis Magallanes et al., 2018
  †Imagotaria Mitchell, 1968
  †Imagotaria downsi Mitchell, 1968
  †Pontolis True, 1905
  †Pontolis magnus (True, 1905) [Pontoleon magnus True, 1905]
  Neodobenia Magallanes et al., 2018
  †Gomphotaria Barnes & Rashke, 1991
  †Gomphotaria pugnax Barnes & Rashke, 1991
  †Dusignathinae Mitchell, 1968
  †Dusignathus Kellogg, 1927
  †Dusignathus seftoni Deméré, 1994
  †Dusignathus santacruzensis Kellogg, 1927
  Odobeninae J. A. Allen, 1880
  †Aivukus Repenning & Tedford, 1977
  †Aivukus cedrosensis Repenning & Tedford, 1977
  †Protodobenus Horikawa, 1995
  †Protodobenus japonicus Horikawa, 1995
  †Pliopedia Kellogg, 1921
  †Pliopedia pacifica Kellogg, 1921
  †Ontocetus Leidy, 1859
  †Ontocetus emmonsi Leidy, 1859
  †Valenictus Mitchell, 1961
  †Valenictus chulavistensis Deméré 1994
  †Valenictus imperialensis Mitchell, 1961
  Odobenus Brisson, 1762
  †Odobenus mandanoensis Tomida, 1989
  Panotariidae Velez-Juarbe, 2017
  †Eotaria Boessenecker & Churchill, 2015
  †Eotaria circa Velez-Juarbe, 2017
  †Eotaria crypta Boessenecker & Churchill, 2015
  Otariidae J. E. Gray, 1825
  Callorhinae Muizon, 1978
  †Pithanotaria Kellogg, 1925
  †Pithanotaria starri Kellogg, 1925
  Callorhinus J. E. Gray, 1859
  †Callorhinus inouei (Kohno, 1992) [Thalassoleon inouei Kohno, 1992]
  †Callorhinus macnallyae (Repenning & Tedford, 1977) [Thalassoleon macnallyae Repenning & Tedford, 1977]
  †Callorhinus gilmorei Berta & Deméré, 1986
  Otariinae J. E. Gray, 1825
  †Thalassoleon Repenning & Tedford, 1977
  †Thalassoleon mexicanus Repenning & Tedford, 1977
  Zalophini J. E. Gray, 1869
  †Proterozetes Barnes et al., 2006
  †Proterozetes ulysses Barnes et al., 2006
  †Oriensarctos Mitchell, 1968
  †Oriensarctos watasei (Matsumoto, 1925) [Eumetopias watasei Matsumoto, 1925]
  Otariini J. E. Gray, 1825
  Otaria Péron, 1816
  †Otaria fischeri Gervais & Ameghino, 1880
  Neophoca J. E. Gray, 1866
  †Neophoca palatina King, 1983
  †Hydrarctos Muizon, 1978
  †Hydrarctos lomasiensis Muizon, 1978
caption: Reconstruction of Archaeodobenus akamatsui by Tatsuya Shinmura (Ashoro Museum of Paleontology).
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