Family Thaumatichthyidae

Lasiognathus - The closest relative of Lasiognathus is Thaumatichthys, which also has enlarged and hinged premaxillaries, escal denticles, and a branched upper operculum.

Thaumatichthys - Thaumatichthys is a genus of deep-sea anglerfish in the family Thaumatichthyidae, with three known species.