The Suborder Prosauropoda is a group of extinct diapsid reptiles that lived during the Triassic period. They are often referred to as the "first dinosaurs" due to their dinosaur-like characteristics. There are several synonyms for the Suborder Prosauropoda, including the clade Plateosauria and the family Plateosauridae. Other terms used to describe this group include "early sauropodomorphs" and "primitive saurischians". The Suborder Prosauropoda includes several genera, such as Plateosaurus, Massospondylus, and Lufengosaurus, which are all known for their small size and bipedal locomotion. Despite their relatively simple anatomy, these early dinosaurs played a crucial role in the evolution of the dinosaurs that followed.