Captorhinida

Captorhinida is a doubly paraphyletic grouping of early reptiles, traditionally composed of the following families:


 * Captorhinidae (Cotylosaurs)
 * Protorothyrididae, a clade of small, lizard-like reptiles.
 * Bolosauridae, earliest bipedal reptiles
 * Millerettidae

While they all share primitive features and resemble the ancestors of all modern reptiles, some of these families are more closely related to (or belong to) the subclass anapsida, while others are further along the line leading to diapsids. For this reason, the group is only used informally, if at all, by most modern paleontologists.