Journal of Biosciences

, 34:673

The origin and early evolution of whales: macroevolution documented on the Indian Subcontinent

Article

DOI: 10.1007/s12038-009-0060-0

Cite this article as:
Bajpai, S., Thewissen, J.G.M. & Sahni, A. J Biosci (2009) 34: 673. doi:10.1007/s12038-009-0060-0

Abstract

The origin of whales (order Cetacea) from a four-footed land animal is one of the best understood examples of macroevolutionary change. This evolutionary transition has been substantially elucidated by fossil finds from the Indian subcontinent in the past decade and a half. Here, we review the first steps of whale evolution, i.e. the transition from a land mammal to obligate marine predators, documented by the Eocene cetacean families of the Indian subcontinent: Pakicetidae, Ambulocetidae, Remingtonocetidae, Protocetidae, and Basilosauridae, as well as their artiodactyl sister group, the Raoellidae. We also discuss the influence that the excellent fossil record has on the study of the evolution of organ systems, in particular the locomotor and hearing systems.

Keywords

CetaceaEoceneevolutionIndiawhales

Copyright information

© Indian Academy of Sciences 2009

Authors and Affiliations

  1. 1.Department of Earth SciencesIndian Institute of TechnologyRoorkeeIndia
  2. 2.Department of Anatomy and NeurobiologyNortheastern Ohio Universities College of MedicineRootstownUSA
  3. 3.Geology DepartmentPanjab UniversityChandigarhIndia