Reorganization of the theropod wrist preceded the origin of avian...

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2025-07-09 16:33:13 -

WWW.NATURE.COM

Reorganization of the theropod wrist preceded the origin of avian flight

Nature, Published online: 09 July 2025; doi:10.1038/s41586-025-09232-3The forelimbs of two Late Cretaceous theropod dinosaurs show the presence of the pisiform bone, previously thought to have been lost early in theropod evolution and regained in birds during the evolution of flight, indicating that a birdlike pisiform appeared prior to the evolution of flight.

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