NOTES ON SYMBIOTIC DECAPOD CRUSTACEANS FROM GORGONA ISLAND, COLOMBIA, WITH A REVISION OF THE EASTERN PACIFIC SPECIES OF TRAPEZIA (BRACHYURA, XANTHIDAE), SYMBIONTS OF SCLERACTINIAN CORALS

Abstract

Collections of decapod crustaceans associated with scleractinian corals at Gorgona Island, Colombia, have provided material for a revision of the eastern Pacific specics of Trapezia (Brachyura, Xanthidae), obligate symbionts of the coral Pocillopora. Four sympatric specie are recognized: T. corallina Gerstaecker, T. formosa Smith, T. ferruginea Latreille, and T. digitalis Latreille. Two species of symbiotic natantian shrimps [Harpiliopsis spinigera (OrtmannJ from Pocillopora and Periclhnenes soror Nobili from asteroids] are recorded from Gorgona for the first time.