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Search Results: Pelycosauria

An extinct order of reptiles of the subclass Synapsida. They are characterized by a temporal fossa that lies low on the side of the skull. The group...


= Encyclopedia Article; = Research Update
Skeletal reconstruction of the pelycosaur-grade synapsid Dimetrodon. Remains of this animal are relatively common in the lower Permian rocks of north-central Texas, where it was the top carnivore of its ancient ecosystem. Dimetrodon grew up to 10 ft (3 m) in total body length. (Reconstruction modified from A. S. Romer and L. I. Price, Review of the Pelycosauria, Geol. Soc. Amer. Spec. Pap., 28:1–538, 1940)
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