Astergnathidae

Astergnathidae is a family of Ceratoasterformes distinguished by the presence of jaws. They typically have a membrane between their anal fingers which can be pulled back for mating, and their lateral arms are modified to be flipper-like.

Astergnathids are distinguished by other lagnodactyls by their skeletons. All species have a pelvic ring and vertebrae. They swim with horizontal tail fins, like a Terran dolphin, and they have four sets of gills. While having pinhole eyes is the ancestral state, most species have since evolved camera eyes of varying complexity.

The following are in this family: