Himalayacetus

Himalayacetus is an extinct genus of carnivorous aquatic mammal of the family Ambulocetidae. The holotype was found in Himachal Pradesh, India, (: paleocoordinates ) 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.
"Himalayacetus" lived in the ancient coastline of the ancient Tethys Ocean before the Indian Plate had collided with the Cimmerian coast. Just like "Gandakasia", "Himalayacetus" is only known from a single jaw fragment, making comparisons to other Ambulocetids difficult.
Description.
Upon its discovery, "Himalayacetus" was described as a pakicetid because the dentary has a small mandibular canal and a dentition similar to "Pakicetus". assigned "Himalaycetus" to the ambulocetids.
Etymology.
"Himalayacetus" was named by . Its type is "Himalayacetus subathuensis" after the Himalayas, "cetus", "whale", and the Subathu Formation, the type locality.
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).