New information on the anatomy of the Late Permian gliding reptile<Emphasis Type="Italic">Coelurosauravus</Emphasis>

A new almost complete specimen ofCoelurosauravus is reported from the Kupferschiefer (Upper Permian) at Mansfeld, Sachsen/Anhalt (Germany). The well preserved posterior half of the skull differs from the previous finds by the large parietals and squamosals. The latter are interpreted as Single elements, rather than as combination of squamosal and supratemporal, and it is supposed that they may have been partially mobile, features of a male individual, and could be deployed in order to produce a threat display. Thin-sections of the patagial spars show the typical anatomical structures of lamellar bones with rather sparsely distributed osteocyte lacunae. Compared to earlier reconstructions a new restoration of the complete skeleton ofCoelurosauravus has a shorter trunk and “wings” with a delta-shaped outline and a feather-like “foresail”. What may be an impression of the patagium is preserved on one specimen in association with the second spar. The presumed mechanism of unfolding and folding the patagium is tried to be reconstructed.