Stethacanthus altonensis Eurhinosaurus Protoceratops was a herbivore that

Protoceratops was a herbivore that fed mainly on low plants and shrubs

como los neandertales y los primeros humanos modernos

especially in the Western Interior Sea

permitiéndole desplazarse de manera estable por llanuras aluviales y ambientes semiáridos

Stethacanthus altonensis Eurhinosaurus Protoceratops was a herbivore thatStethacanthus altonensis is an extinct cartilaginous fish from the Early Carboniferous (late Mississippian, approx. 330320 million years ago), belonging to the Symmoriida group within Chondrichthyes, a primitive lineage closely related to early sharks and chimaeras. It is the type species of the genus Stethacanthus, a taxon particularly renowned for one of the strangest anatomical structures known among Paleozoic vertebrates: a modified anterior