Allathelges pakistanensis, new genus, new species, a bopyrid isopod from Karachi, Pakistan, with a review of the Athelginae recorded from the Indian Ocean

Allathelges pakistanensis, new genus, new species, is described as a parasi te of Paguristes perspicax near Karachi, Pakistan. Allathelges is distingui shed from other athelgine genera by the following characters: female, head no longer than broad, oostegite 1 folded and extending well beyond head, al l pereiopods evenly spaced, no posterolateral extension of oostegite 5, 5 p airs of biramous pleopods, no uropods; male, head separated from pereion, p leonal margins not indicating fused pleomeres. Allathelges is most similar to Athelges from which it differs by having 5, not 4, pairs of biramous ple opods in the female. The other 4 known species of the Athelginae in the Ind ian Ocean are reviewed. Anathelges mossambica and Athelges caudalis are so poorly known that it is uncertain whether their generic placements are corr ect; Athelges aegyptius was well described and correctly placed; and Athelg es neotenuicaudis is reassigned to the genus Parathelges.