skip to content
Whales originated from aquatic artiodactyls in the Eocene epoch of India.
ClosePreview this item
Checking...

Whales originated from aquatic artiodactyls in the Eocene epoch of India.

Author: JG Thewissen Affiliation: Department of Anatomy, Northeastern Ohio Universities College of Medicine, Rootstown, Ohio 44272, USA. thewisse@neoucom.edu; LN Cooper; MT Clementz; S Bajpai; BN Tiwari
Edition/Format: Article Article : English
Publication:Nature, 2007 Dec 20; 450(7173): 1190-4
Database:From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Other Databases: ArticleFirstBritish Library Serials
Summary:
Although the first ten million years of whale evolution are documented by a remarkable series of fossil skeletons, the link to the ancestor of cetaceans has been missing. It was known that whales are related to even-toed ungulates (artiodactyls), but until now no artiodactyls were morphologically close to early whales. Here we show that the Eocene south Asian raoellid artiodactyls are the sister group to whales. The  Read more...
Rating:

(not yet rated) 0 with reviews - Be the first.

 

&AllPage.SpinnerRetrieving;

Find a copy in the library

&AllPage.SpinnerRetrieving; Finding libraries that hold this item...

Details

Document Type: Article
All Authors / Contributors: JG Thewissen Affiliation: Department of Anatomy, Northeastern Ohio Universities College of Medicine, Rootstown, Ohio 44272, USA. thewisse@neoucom.edu; LN Cooper; MT Clementz; S Bajpai; BN Tiwari
ISSN:0028-0836
Language Note: English
Unique Identifier: 264243832
Awards:

Abstract:

Although the first ten million years of whale evolution are documented by a remarkable series of fossil skeletons, the link to the ancestor of cetaceans has been missing. It was known that whales are related to even-toed ungulates (artiodactyls), but until now no artiodactyls were morphologically close to early whales. Here we show that the Eocene south Asian raoellid artiodactyls are the sister group to whales. The raoellid Indohyus is similar to whales, and unlike other artiodactyls, in the structure of its ears and premolars, in the density of its limb bones and in the stable-oxygen-isotope composition of its teeth. We also show that a major dietary change occurred during the transition from artiodactyls to whales and that raoellids were aquatic waders. This indicates that aquatic life in this lineage occurred before the origin of the order Cetacea.

Reviews

User-contributed reviews
Retrieving GoodReads reviews...
Retrieving DOGObooks reviews...

Tags

Be the first.
Confirm this request

You may have already requested this item. Please select Ok if you would like to proceed with this request anyway.

Close Window

Please sign in to WorldCat 

Don't have an account? You can easily create a free account.