that Protiguanodon mongoliense, Psittacosaurus osborni, and Psittacosaurus tingi were junior synonyms of Psittacosaurus mongoliensis. In 1958, Yang published...

ceratopsians.[page needed] Early members of the ceratopsian group, such as Psittacosaurus, were small bipedal animals. Later members, including ceratopsids like...

predation attempt by R. robustus directed at a specimen of the dinosaur Psittacosaurus lujiatunensis. R. giganticus is among the largest mammals known from...

examination of melanosomes preserved in the integument of a specimen of Psittacosaurus sp. indicated that the animal was countershaded, with stripes and spots...

and Barosaurus). As of 2022[update], a key holding is a fossilized Psittacosaurus (specimen SMF R 4970) from Liaoning, China, with clear bristles around...

debate over whether these filaments found in specimens of Tianyulong, Psittacosaurus, and Kulindadromeus may have been primitive feathers. Ornithischia is...

History Photograph # 311488 demonstrates an articulated skeleton of a Psittacosaurus mongoliensis, from the Ondai Sair Formation, Lower Cretaceous Period...

Psittacosaurus mongoliensis Psittacosaurus sinensis...

young were seen feeding and communicating with each other. A pair of Psittacosaurus also grazed and hid in the tall grass. The raft then moved behind a...

quills have been reported in specimens of the ornithischian dinosaurs Psittacosaurus and Tianyulong although there has been disagreement. In 2009, Xu et...