DESCRIPTION OF AMPHIASCOIDES-ATOPUS, A NEW SPECIES (CRUSTACEA, COPEPODA, HARPACTICOIDA) FROM A MASS-CULTURE SYSTEM

Amphiascoides atopus, a new species, is described from a mass culture system. Its natural habitats and distribution are unknown. This new sp ecies shares the possession of seven setae on the exopod 3 of leg 4 wi th ten other species in the genus. Amphiascoides atopus can be disting uished from congeneric species by the shape, relative length, and orna mentation of the setae on the leg 5 in both male and female. Possessio n of three setae grouped together on the proximal region of the second endoped segment of leg 2 distinguishes the males of this species from all other described males in this genus.