Fuzzy Dino and Bird (IMAGE)

University of Texas at Austin

Fuzzy Dino and Bird

Caption

These are two of the fossil specimens sampled from the Cretaceous and Jurassic of China. Fuzz-covered dinosaur Beipiaosaurus shows the rounder melanosomes seen in living lizards and crocodilians while the bird shows the unique skinny melanosomes seen in living mammals, birds and many of the studied feathered dinosaurs to date. Changes in the diversity of these melanin-containing organelles may show a physiological shift occurred in feathered dinosaurs closer to the origin of flight.

Credit

Li et al. (authors).

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