ON THE PORCELLANID GENERA RAPHIDOPUS-STIMPSON, 1858, AND PSEUDOPORCELLANELLA-SANKARANKUTTY, 1961, WITH DESCRIPTION OF A NEW MANGROVE SPECIES, RAPHIDOPUS-JOHNSONI FROM SINGAPORE (DECAPODA, ANOMURA)

The porcellanid species Raphidopus ciliatus Stimpson, 1858, and Raphid opus indicus Henderson, 1893, are reported from Singapore and peninsul ar Malaysia respectively for the first time. This is the first record of the genus Raphidopus Stimpson, 1858, from Southeast Asia. A third s pecies of Raphidopus, R. johnsoni sp. nov., is also described from Sin gapore mangroves. Pseudoporcellanella manoliensis Sankarankutty, 1961, a rare and unusual taxon, is also recorded from Peninsular Malaysia, the South China Sea and the Gulf of Thailand for the first time. Detai led redescriptions and extensive figures are provided for all four spe cies, and their taxonomy and ecology discussed.