The genus Fuegiphoxus Barnard & Barnard, 1980 comprises four species widely distributed exclusively in the Southern Ocean. Fuegiphoxus uncinatus (Chevreux, 1912) had been assigned provisionally to this genus. In the present paper, Fuegiphoxus uncinatus is redescribed on the basis of the holotype and it is confirmed as belonging in the genus Fuegiphoxus. The diagnosis of Fuegiphoxus is emended and comparisons with the most related genera are provided. Furthermore, an identification key for the four known species of the genus, F. uncinatus, F. abjectus Barnard & Barnard, 1980, F. inutilus Barnard & Barnard, 1980 and F. fuegiensis (Schellenberg, 1931), is presented.
Crustacea, Amphipoda, Phoxocephalidae, Fuegiphoxus, Fuegiphoxus uncinatus, Southern Ocean, redescription, key.