A new species of Neopeltopsis (Copepoda, Harpacticoida, Peltidiidae) from Althorpe Island, South Australia

A new species of Aleopeltopsis Hicks, 1976 is described from algae collected from Althorpe Island, South Australia. The new species is separated from its congeners by a number of ruorphological characters related to the A2, mandible, P 1, P2, P5 and the male Al. A revised generic diagnosis for Neopeltopsis is provided and intra- and intergeneric relationships are discussed. The occurrence of other species of Peltidiidae, collected from algal washings front Althorpe I., is documented. Neopeltopsis appears to be restricted to the Southern Hemisphere, with previous records limited to New Zealand (N. pectinipes Hicks, 1976) and Argentina (N. hicksi Pallares, 1979).