with a broad rib cage supported by robust and well-articulated dorsal vertebrae

Miragaia is delivered in two pieces

in what is now Hebei Province

helping to dissipate body heat

Archaeoceratops oshimai skull thalassodromeus with a broad rib cageArchaeoceratops oshimai is a basal ornithischian dinosaur from the Early Cretaceous (approx. 125120 million years ago), belonging to the Ceratopsia clade, described from fossil remains found in the Xinminbao Formation, Gansu Province (China). This taxon represents an early form in the evolution of ceratopsids, displaying a combination of primitive and derived characteristics that allow for an understanding of the transition to the large horned