All teeth and claws? New study sheds light on dinosaur claw function

How claw form and function changed during the evolution from dinosaurs to birds is explored in a new study into the claws of a group of theropod dinosaurs known as therizinosaurs. Theropod dinosaurs, a group which includes such famous species as Tyrannosaurus rex and Velociraptor, are often regarded as carnivorous and predatory animals, using their sharp teeth and claws to capture and dispatch prey. However, a detailed look at the claws on their forelimbs revealed that the form and shape of theropod claws are highly variable and might also have been used for other tasks.

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