An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures

Until now all the dinosaurs with feathers or similar integumentary structures discovered have been theropods — carnivorous bipeds that survive today in the form of birds. Feathery structures have been absent among the distantly related ornithischian dinosaurs, with the possible exception of Psittacosaurus, which has quill-like structures on its tail. Zheng et al. now describe an ornithischian with an all-over covering of feather-like structures,...