Protocetus
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| Protocetus Fossil range: Middle Eocene |
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| Protocetus atavus Fraas, 1904 |
Protocetus atavus ('first whale') is an extinct species of primitive cetacean from Egypt. It lived during the middle Eocene period 45 million years ago.
Protocetus had a streamlined, whale-like body around 2.5 metres (8.2 ft) long, but was relatively primitive in many respects; it still had small hind flippers, and its front flippers had webbed toes. The jaws were long and lined with deadly teeth. The shape of the bones in the tails suggests that it may have evolved tail flukes, like those of modern whales, and, while it did not have a true blowhole, the nostrils had already begun to move backwards on the head.[1]
Unlike its more primitive predecessor Pakicetus, the structure of the ears suggests that Protocetus was able to hear properly underwater, although it is unlikely that it could echolocate. Similarly, it retained sufficient olfactory apparatus to have a good sense of smell, although it probably relied more on its eyesight to find prey.[1]
[edit] See also
[edit] References
- ^ a b Palmer, D., ed (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 230. ISBN 1-84028-152-9.
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