Trapezia cheni Galil, 1983 (Decapoda: Brachyura: Trapeziidae) ??? a new species of coral-associated crabs for coastal waters of central Vietnam


I. Marin

Coral-associated crab Trapezia cheni Galil, 1983 (Decapoda: Brachyura: Trapeziidae) is firstly recorded from the Nhatrang Bay and coastal waters of Vietnam increasing the area of distribution greatly to the south. Previously, the species has been known from Taiwan and along coasts of China in the South China Sea. The record increase the number of trapezoid crabs known from Nhatrang Bay up to 22 with 10 species of the genus Trapezia that close to mostly diverse localities - Mollucca Islands and French Polynesia. Trapezia cheni is one of the smallest species in the genus and inhabit colonies of Pocillopora verrucosa (Ellis & Solander, 1786) (Cnidaria: Scleractinia: Pocilloporidae) influenced in tidal zone by strong waves thereby avoiding competition with larger Trapezia species inhabiting deeper dwelling coral colonies.

Keywords: Crustacea; Decapoda; Trapezia; corals; symbiosis; Pocillopora; high energy reef ecosystems; Nhatrang Bay; Vietnam

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