On A Collection of Leucosiid Crabs from the Southeast Coast of Taiwan

Two new species of leucosiid crabs of the genusUrnalanaGalil, 2005, are described from Taiwan.Urnalana erytheman. sp. is distinguished from the superficially similarU. angulata(Rathbun, 1911) in the shape of the apical process of the male first gonopod, which is beak-shaped and curved ventrally in the former, but sickle-shaped in the latter.Urnalana hirsutan. sp. differs from the superficially similarU. elatulaGalil, 2005 in its setose carapace and the shape of the apical process of the male first gonopod, which is club-like in the former, vs. dagger-shaped and curved in the latter. Two species are recorded for the first time from Taiwan:Raylilia uenoi(Takeda, 1995), and the recently describedCoralliocryptus caementaKomai & Ng, 2012. Three additional species,Arcania sagamiensisSakai, 1969,Urnalana purarensis(Ovaere, 1987) andOreotlos latus(Borradaile, 1903) are recorded for the second time. Diagnostic characters, colour photos and distributional information of these species are presented in this paper.