Dimetrodon

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Dimetrodon

 

an extinct genus of predatory mammal-like reptiles of the order Pelycosauria. The Dimetrodon, which grew up to 2.7 m, had dorsal vertebrae with very long spiny appendages, projecting from the dorsal surface and serving, perhaps, to stretch the membrane (dorsal sail), the purpose of which is unclear. There were some ten species. Remains of the Dimetrodon are known from the Permian deposits of North America.

REFERENCE

Osnovy paleontologii: Zemnevodnye, presmykaiushchiesia i ptitsy. Moscow, 1964.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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