Nauplius 20(2): 203-246, 2012 203 The fiddler crabs (Crustacea: Brachyura: Ocypodidae: genusUca ) of the South Atlantic Ocean Luis Ernesto Arruda Bezerra Universidade Federal Rural do Semi-Árido, Departamento de Ciências Animais, Av. Francisco Mota, 572, 99625-900, Mossoró, Rio Grande do Norte, Brazil. E-mail:
[email protected] Programa de Pós-Graduação em Ciências Marinhas Tropicais, Instituto de Ciências do Mar (LABOMAR), Universidade Federal do Ceará. Abstract The taxonomy of the 11 species of fiddler crabs [Uca (Uca) maracoani (Latreille, 1802-1803), U. (U.) tangeri (Eydoux, 1835), U. (Minuca) burgersi Holthuis, 1967, U. (M.) mordax (Smith, 1870), U. (M.) rapax (Smith, 1870), U. (M.) thayeri Rathbun, 1900, U. (M.) victoriana von Hagen, 1987, U. (M.) vocator (Herbst, 1804), U. (Leptuca) cumulanta Crane, 1943, U. (L.) leptodactyla Rathbun, 1898 and U. (L.) uruguayensis Nobili, 1901] of the South Atlantic Ocean is reviewed. Keys for identification, updating the keys for the Atlantic Ocean are proposed, including the species recently described. Comments reporting morphological variations among types and additional material and among populations of different localities are included. The Atlantic species are divided into three subgenera: Uca s. str., Minuca and Leptuca. The eastern Atlantic species U. (U.) tangeri is included in subgenus Uca s. str. due to the presence of a proximal spine opposing the spoon-tipped setae of the second maxilliped, which is considered an apomorphic character of the subgenus Uca s. str. Key words: Genus Uca, South America, taxonomy Introduction taxa and synonymized others, while Ng et al. (2008) listed all species and allocated them Since the monumental work of Crane to nomenclaturally valid subgenera following (1975), several taxonomic changes have been the subgeneric system proposed by Beinlich proposed in the taxonomy of fiddler crabs and von Hagen (2006).