Chapter

Cetacea

Philip D. Gingerich

in Cenozoic Mammals of Africa

Published by University of California Press

Published in print July 2010 | ISBN: 9780520257214
Published online March 2012 | e-ISBN: 9780520945425 | DOI: http://dx.doi.org/10.1525/california/9780520257214.003.0045
Cetacea

Show Summary Details

Preview

Cetacea, comprising the great whales and the smaller dolphins and porpoises, have special interest in mammalian evolution as one of the two orders of mammals that became fully aquatic. Much of the 200-million-year-long history of mammals is a history of life on land. Cetacea and Sirenia are exceptions and, of the two aquatic groups, Cetacea is the more diverse and broadly successful. Adaptation to life in water made cetacean morphology sufficiently different to preclude direct comparison to potential land-mammal ancestors. There were morphological and immunological suggestions that cetaceans might be related to Artiodactyla, but none of these claims was convincing by itself. In recent years, the fossil record has helped to clarify both the artiodactyl ancestry of cetaceans among land mammals, and also the nature of the transition. Several comprehensive reviews of cetacean evolution have been published in recent years by authors who are experts on Mysticeti and Odontoceti. These are recommended for a general overview of the fossil record of cetacean evolution. This chapter focuses on Eocene Archaeoceti.

Keywords: Cetacea; great whales; dolphins; porpoises; cetaceans; evolution; Artiodactyla; Archaeoceti; Mysticeti; Odontoceti

Chapter.  20015 words.  Illustrated.

Subjects: Evolutionary Biology

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.