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Abstract
Brachihatschekia lobulata a new genus and species of parasitic copepod, is described and illustrated. It was found on the gills of the fish Dicrolene nigra (Ophiididae). The new genus Brachihatschekia is characterized by the possession of three pairs of biramous thoracopods (the third pair being situated at the apex of a prominent, ventrolateral, brachiform projection) as well as by the position of the rami of the second thoracopod parallel to the interpodal bars. B. lobulata is the fourth member of Hatschekiidae reported from teleost fishes in the waters of Chile, South Pacific.