A new species of Cyrtomaia Miers, 1886 (Crustacea: Decapoda: Brachyura: Majidae) from Micronesia

A new species of deep-sea spider crab of the genus Cyrtomaia (Brachyura: Majidae) is described from Guam and Palau. Cyrtomaia micronesica n. sp. is differentiated from its closest congener, C. cornuta Guinot & Richer de Forges, 1988, from New Caledonia by a different carapace armature, shorter basal antennal spines, proportionately longer chelipeds, relatively longer male second and fourth ambulatory meri, and a different male first pleopod.