2038661
9781592964116
Pelycosaurs were lizardlike creatures that inhabited Earth long before dinosaurs first appeared. From sail-backed Dimetrodon to tiny Archaeothyris, pelycosaurs shared characteristics of both mammals and reptiles. Learn about the prehistoric animals tGray, Susan H. is the author of 'Pelycosaurs', published 2005 under ISBN 9781592964116 and ISBN 1592964117.
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