A new species of Pseudostegias Shiino, 1933 (Crustacea : Isopoda : Bopyridae : Athelginae) parasitic on hermit crabs from Bali

A single male and female bopyrid pair was collected in Sanur, Bah, Indonesi a in August 1997, from the abdomen of a hermit crab, Calcinus gaimardii (H. Milne Edwards). Examination of these specimens showed that they belong to the athelgine genus Pseudostegias Shiino, but cannot be placed into any des cribed species. We describe this new species as P. macdermotti and compare it to P, dulcilacuum Markham, which it most closely resembles. This is the first record of a Pseudostegias from the genus Calcinus. A list and key of all described Pseudostegias species are provided.