Takikawa sea cow

The Takikawa sea cow (Hydrodamalis spissa) is an extinct herbivorous marine mammal of the Late Pliocene, which was closely related to the recently extinct Steller's sea cow (H. gigas). In 1988, fossils of sea cows were discovered in Hokkaido, but were originally assigned to the Takikawa sea cow,[1] a newly described species, even though this taxon is thought of by some scientists as a synonym of the Cuesta sea cow (H. cuestae). It is uncertain whether or not the Takikawa sea cow was simply a local variant of the Cuesta sea cow or a completely separate lineage.[1][2][3] However, Steller's sea cow and the Takikawa sea cow share more morphological similarities than between the Takikawa sea cow and the Cuesta sea cow.[4]

Relations within Hydrodamalinae
Sirenia

Dusisiren reinharti

Dusisiren jordani

Dusisiren dewana

Dusisiren takasatensis

Hydrodamalis cuestae

Hydrodamalis spissa

Hydrodamalis gigas

Based on a 2004 study by Hitoshi Furusawa[4]

Takikawa sea cow
Temporal range: Late Pliocene 3.6–2.6 Ma
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Family:
Subfamily:
Genus:
Species:
H. spissa

Furusawa, 1988
Synonyms

?†H. cuestae Domning, 1978

References

  1. Furusawa, Hitoshi (1988). A new species of hydrodamaline Sirenia from Hokkaido, Japan. Takikawa Museum of Art and Natural History. pp. 1–73.
  2. Marsh, Helene; O'Shea, Thomas J.; Reynolds III, John E. (2011). "Steller's sea cow: discovery, biology and exploitation of a relict giant sirenian". Ecology and Conservation of the Sirenia: Dugongs and Manatees. New York: Cambridge University Press. pp. 18–35. ISBN 978-0-521-88828-8.
  3. Furusawa, Hitoshi (1990). "Discovery and significance of the Takikawa sea cow (Hydrodamalis spissa) from Numata-cho, Uryu-gun, Hokkaido, Japan". Earth Science. 44 (4): 224–228.
  4. Furusawa, Hitoshi (2004). "A phylogeny of the North Pacific Sirenia (Dugongidae: Hydrodamalinae) based on a comparative study of endocranial casts". Paleontological Research. 8 (2): 91–98. doi:10.2517/prpsj.8.91.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.