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Pelycosauria |
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Pelycosauria [‚pel·ə·kə′sȯr·ē·ə] (paleontology) An extinct order of primitive, mammallike reptiles of the subclass Synapsida, characterized by a temporal fossa that lies low on the side of the skull. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The process of development can be traced by following the evolution of pelycosaurs (animals with spiked sails on their backs that resembled large Komodo dragons) to cynodonts, whose jaws and related muscular features were much closer to those of mammals. |
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