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The asymmetry of the carpal joint and the evolution of wing folding in maniraptoran theropod dinosaurs
Laboratory of Evolutionary Systematics of Vertebrates Institute of Vertebrate Palaeontology
2014/3/26
In extant birds, the hand is permanently abducted towards the ulna, and the wrist joint can bend exten-
sively in this direction to fold the wing when not in use. Anatomically, this asymmetric mobili...