Coelurosauravus

Coelurosauravus (meaning "hollow lizard grandfather") is a genus of basal diapsid reptiles. Like its relatives in the family Weigeltisauridae, members of this genus possessed long, rod-like ossifications along the edge of the body. These bony rods were not extensions of the ribs but were instead newly developed bones derived from the skin of the animal, a feature which is unique to the genus and its close relatives. It is believed that during life, these structures were covered with skin, forming wing-like surfaces which "Coelurosauravus" could use for gliding.
"Coelurosauravus" was originally known from a single species, C. elivensis, which was named in 1926 based on fossils from the Sakamena Formation of Madagascar. Many other genera of weigeltisaurids have been lumped into "Coelurosauravus" since its original discovery. Most notable of these was "Weigeltisaurus jaekeli", originally described from Germany in 1930. This European species is now known from numerous specimens found in Germany (and one in England), of which some were very well preserved. In 1987, "Weigeltisaurus jaekeli" was synonymized with "Coelurosauravus" as a second species, "Coelurosauravus jaekeli". However, a 2015 study reinstated "Weigeltisaurus" as a separate genus for ""Coelurosauravus" jaekeli".
"Coelurosauravus" specimens had an average length of . The body was long and flat, suitable for gliding. The skull was lizard-like with a pointed snout and contained a broad back with a serrated crest, superficially resembling the crests of ceratopsian dinosaurs.
Specimens.
"Daedalosaurus madagascariensis" Carroll, 1978, based on a specimen from the Late Permian Sakamena Formation of the Morondava Basin in Madagascar, is a synonym of "Coelurosauravus elivensis", the type species of "Coelurosauravus". "Gracilisaurus ottoi" and "Weigeltisaurus jaekeli", both from the Late Permian Kupferschiefer of northeastern Germany, were also synonymized with "Coelurosauravus" in 1987. "Weigeltisaurus jaekeli" was retained as a separate species of "Coelurosauravus", "Coelurosauravus jaekeli". However, a pair of 2015 studies by Bulanov & Sennikov re-evaluated skull material referred to "Coelurosauravus" and reinstated "Weigeltisaurus jaekeli" as a valid genus.
"Coelurosauravus elivensis".
Known from the Sakamena formation of Madagascar.
"Coelurosauravus (Weigeltisaurus) jaekeli".
Known from the Kupferschiefer of Germany and the Marl Slate of England.