Taxonomy of the genus Dissodactylus (Crustacea: Brachyura: Pinnotheridae) with descriptions of three new species

Several taxonomic problems within the genus Dissodactylus (Crustacea: Pinnotheridae) are resolved. Dissodactylus alcocki Rathbun, 1918 is a junior synonym of D. juvenilis Bouvier, 1917. D. meyerabichi Bott, 1955 is a junior synonym of D. nitidus Smith, 1870. D. smithi Rioja, 1944 is a junior synonym of D. lockingtoni Glassell, 1935 and not of D. nitidus, as previously described. Three new species, D. latus, D. schmitti and D. ususfructus, are described, and D. stebbingi is redescribed, accompanied by a description of the first zoeal stage. Thirteen species are currently recognized, and host and distributional data are given for each. A key to the species of Dissodactylus is provided.