Histologic Examination of an Assemblage ofPsittacosaurus(Dinosauria: Ceratopsia) Juveniles From the Yixian Formation (Liaoning, China)

Psittacosaurus is one of the most abundant dinosaurs known, which allows for extensive study of its growth and form. Previous studies have evaluated growth trajectories of Psittacosaurus using bone histology. However, we present the first study of Psittacosaurus comparative juvenile histology and describe the histology of Psittacosaurus within its first year of life based on multiple sections taken from an exquisite monospecific assemblage of...