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Saurischia�|Theropoda�@�W

Tetanurae�|�B

�iCoelurosauria�@�j

Maniraptoriformes

"hollow tail"

Coelurus fragilis Coeluridae Naming person...O.C.Marsh / 1879 Late Jurassic�^�Q�� long�^�@�Q�O�����H�^Wyoming