Lasiognathus dinema is a species of marine ray-finned fish belonging to the family Thaumatichthyidae, the wolftrap anglers.

[2] This species belongs to the genus Lasiognathus which the 5th edition of Fishes of the World classifies within the family Thaumatichthyidae, within the suborder Ceratioidei of the anglerfish order Lophiiformes.

This may be a reference to the many long teeth in the upper jaw, goving the appearance of a beard.

The specific name, dinema, means "two threads" , an allusion to te two elongated filaments that emerge from the bases of the hooks on the escal bulb.

The type locality is close to the location of the Deepwater Horizon oil spill and the population, range and biology of this species are poorly understood, leading the International Union for Conservation of Nature to classify this species as Data deficient.