Silesauridae

Common card · No. 360802

Silesauridae is an extinct family of early dinosauriforms which lived during the Triassic Period. Their fossils have been found in Europe, North America, South America, Africa, and India, reaching their widest distribution and diversity early in the Late Triassic. The exact affinities of silesaurids are debated, and various studies come to different conclusions regarding the relationship between silesaurids and early dinosaurs. Some studies regard silesaurids as a clade of non-dinosaur dinosauriforms, as well as the sister group of dinosaurs. In other words, all silesaurid species originated from a single common ancestor which evolved adjacent to, but not within, the group Dinosauria. Other studies argue that most or all silesaurids (a.k.a. "silesaurs") belong within Dinosauria, specifically as long-sought Triassic representatives of the ornithischian dinosaurs. A few silesaurs may still comprise an exclusive clade within Ornithischia, but most correspond to a paraphyletic grade (a series...

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