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Pelycosaurs
Susan H. Gray
language (Core Learning Library, Jan. 1, 2014)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 that preceded dinosaurs by several million years.
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Pelycosaurs
Susan Heinrichs Gray
Library Binding (The Childs World Inc, Jan. 1, 2005)Introduces the prehistoric animal who lived on the Earth before the dinosaurs, discussing its physical characteristics, habitat, and behavior.
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