Tetragonurus Risso, 1810
Snout blunt and broad, operculum fleshy; eye generally lacks adipose tissue, and usually with a prominent series of small grooves in the posterior rim. Characteristic box-like mouth, with the lower jaw fitting completely within the upper when the mouth is closed; teeth in the upper jaw small and recurved, those in the lower large, laterally flattened, knife-like and close-set; strong recurved teeth present on the vomer and palatines.
Species 3; in Clofnam area 2.
Recent revisions: Grey (1955), Haedrich (1967).
Species of this genus in the program:
Tetragonurus atlanticus
Tetragonurus cuvieri