Tag Archive for 'Carpal bone'

This scene depicts an oviraptorid dinosaur called Citipati being startled while resting on a sand dune. The creature raises its arms in a threat display, which reveals its wrists, highlighting the small migrated pisiform carpal (blue X-ray view) bone. Image credit: Henry S. Sharpe.

Key Wrist Bone Appeared in Bird Ancestors Millions of Years Earlier than Previously Thought

Jul 14, 2025 by News Staff

A team of paleontologists from Yale University and Stony Brook University made this discovery after examining fossils from two species of bird-like dinosaurs...