Coelophysis Coelophysis was a theropod from Triassic North America. It had a narrow head, shaped like a stork’s, with a long curved neck. Its body was slim and compact, with long legs and three-toed, bird-like feet. Its short arms had three-fingered clawed hands. Coelophysis's long tail (half its length) was used to balance the rest of its body. Coelophysis was as long as a small car but, because its bones were hollow, it was as light as an eight-year-old child.
A pack of Coelophysis on the moveCoelophysis may have been a ferocious pack-hunter, with several of them surrounding and ambushing their prey. Rushing at its victim, Coelophysis would catch its prey in its jaws with a sudden, jabbing motion of the head. It could swallow smaller prey whole. When tackling larger prey, it would hold it down with its claws while tearing it apart with its teeth.
The name Coelophysis means “hollow form”, after its hollow bones.
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