Himalayacetus

Himalayacetus
Temporal range: Early Eocene, 53.5 Ma
↓
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Family: †Ambulocetidae
Genus: †Himalayacetus
Bajpai & Gingerich, 1998[1]
Species:
†H. subathuensis
Binomial name
†Himalayacetus subathuensis
Bajpai & Gingerich, 1998[1]

Himalayacetus is an extinct genus of carnivorous aquatic mammal of the family Ambulocetidae. The holotype was found in Himachal Pradesh, India, (31°00′N 77°00′E / 31.0°N 77.0°E / 31.0; 77.0: paleocoordinates 3°30′N 69°42′E / 3.5°N 69.7°E / 3.5; 69.7)[2] in what was the remnants of the ancient Tethys Ocean during the Early Eocene. This makes Himalayacetus the oldest archaeocete known, extending the fossil record of whales some 3.5 million years.[3]

Himalayacetus lived in the ancient coastline of the ancient Tethys Ocean before the Indian Plate had collided with the Cimmerian coast. Like Gandakasia, Himalayacetus is only known from a single jaw fragment, making comparisons to other ambulocetids difficult.[4]

Description

Upon its discovery, Himalayacetus was described as a pakicetid because the dentary has a small mandibular canal and a dentition similar to Pakicetus.[3] Thewissen, Williams & Hussain 2001 assigned Himalaycetus to the ambulocetids.

Etymology

Himalayacetus was named by Bajpai & Gingerich 1998. Its type is Himalayacetus subathuensis after the Himalayas, cetus, "whale", and the Subathu Formation, the type locality.[5]

Taxonomy

It was considered monophyletic by Uhen (2010). It was assigned to Pakicetidae by Bajpai and Gingerich (1998) and McLeod and Barnes (2008); and to Ambulocetidae by Thewissen et al. (2001) and Uhen (2010).[6]

Notes

  1. ^ a b Bajpai & Gingerich 1998.
  2. ^ Kuthar Nala (Eocene of India) in the Paleobiology Database. Retrieved June 2013.
  3. ^ a b Bajpai & Gingerich 1998, Abstract
  4. ^ Thewissen, JGM. "Ambulocetidae: The First Coastal Whales". Archived from the original on 3 April 2013. Retrieved 1 February 2013.
  5. ^ Bajpai & Gingerich 1998, p. 15464
  6. ^ Himalayacetus in the Paleobiology Database. Retrieved June 2013.

References

Wikispecies has information related to Himalayacetus.


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