NEW RECORDS OF GALL CRABS (DECAPODA, CRYPTOCHIRIDAE) FROM ORCHID ISLAND, TAIWAN, NORTHWESTERN PACIFIC BY

Orchid Island (Lan-Yu) (22◦1′N 121◦5′E), Taitung county, a remote island off Taiwan, harbours well developed hard coral communities. These may provide various favourable habitats for their obligate symbionts, gall crabs. Until now, not even a single species of these crabs had been recorded from Orchid Island. For this study, we collected hard corals by SCUBA diving at the coral reefs surrounding Orchid Island. We identified nine species of gall crabs belonging to nine genera. They include Cryptochirus coralliodytes inhabiting Goniastrea australensis; Lithoscaptus paradoxus on G. australensis; Hiroia krempfi on Hydnophora exesa; Neotroglocarcinus hongkongensis on Turbinaria mesenterina and T. peltata; Pseudocryptochirus viridis on T. mesenterina; Dacryomaia edmonsoni on Psammocora contigua; Opecarcinus crescentus on Coscinaraea columna and Pavona venosa; Utinomiella dimorpha on Pocillopora verrucosa; and Hapalocarcinus marsupialis on P. verrucosa. Including the new records from Orchid Island in this study, the established brachyuran crab fauna of Taiwan now stands at 611 species. RÉSUMÉ Orchid Island (Lan-Yu) (22◦1′N 121◦5′E), Taitung county, une île éloignée au large de Taiwan