Rhamphorhynchus

Today, I'm going to tackle another one of these 'clades', or really more of a 'grade'. In this case, a group among one of the most popular and well-known prehistoric reptiles, the pterosaurs. As a group, it's probably one of the most distinctive...it's reptiles, specifically archosaurs, that are evolved to fly. It's hard to say much about them, everyone knows what a pterosaur is! As a group, they showed up in the late Triassic, although fossil ancestors aren't known--maybe due…