Desmostylus hesperus Marsh 1888 (desmostylian)

Mammalia - Perissodactyla - Desmostylidae

Synonyms: Desmostylella typica Nagao 1937, Desmostylus californicus Hay 1923, Desmostylus cymatias Hannibal 1922, Desmostylus hesperus japonicus Tokunaga and Iwasaki 1914, Desmostylus japonicus Tokunaga and Iwasaki 1914, Desmostylus minor Nagao 1937, Desmostylus mirabilis Nagao 1935, Desmostylus watasei Hay 1915

Full reference: O. C. Marsh. 1888. Notice of a new fossil sirenian, from California. American Journal of Science 25(8):94-96

Belongs to Desmostylus according to D. P. Domning 2008

See also Domning 1996, Dubrovo and Sinel'nikova 1971, Hannibal 1922, Hasegawa et al. 1995, Hay 1902, Hay 1915, Hay 1930, Ijiri and Kamei 1961, Kamei and Okazaki 1974, Marsh 1888, Matsui 2017, Nagao 1935, Reinhart 1959, Sakurai 2009, Shikama 1966, Trouessart 1898, Trouessart 1904, VanderHoof 1937 and Zittel 1925

Sister taxa: none

Type specimens:

  • Desmostylus hesperus: YPM 1395d, a set of teeth. Its type locality is Mission San Jose, east, which is in a Miocene marine horizon in the Briones Formation of California.
  • Desmostylella typica: TIU 56701, a tooth. Its type locality is Yuda, which is in a Miocene marine sandstone in the Yuda Formation of Japan.
  • Desmostylus californicus: CASG 66601.01 (Stanford University 5118).
  • Desmostylus cymatias: USNM 8191, a partial skull. Its type locality is Cape Foulweather, which is in a Burdigalian marine horizon in the Astoria Formation of Oregon.
  • Desmostylus japonicus: NSMT P-5600, a partial skull. Its type locality is Togari, which is in a Miocene marine horizon in the Akeyo Formation of Japan.
  • Desmostylus minor: UHR 7428, a tooth (right upper M2). Its type locality is Asanai-zawa, which is in a Miocene marine shale in the Hacchorei Formation of the Russian Federation.
  • Desmostylus mirabilis: UHR 18466, a partial skeleton. Its type locality is Keton River, which is in a Miocene marine horizon in the Uchiboro Formation of the Russian Federation.
  • Desmostylus watasei: NSMT P-5600, a partial skull.

Ecology: amphibious herbivore

Distribution:

• Miocene of Japan (2 collections), Mexico (2), the Russian Federation (2), United States (41: California, Oregon, Washington)

• Arikareean of United States (2: California, Oregon)

Total: 49 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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