Rathbun, 1897
Carapace much broader than long and trapezoidal in outline. Dorsal surface with regions and subregions well indicated. Entire body thickly granulated and rugose. A subhepatic cavity clearly defined, without forming a strong concavity in the antero-lateral margins of the carapace. Antero-lateral margins of the carapace lobate or dentate. Presence of a defined pre-orbital tooth. No circular opening at the junction of the carpus and propodus of chelipeds. Fingers of chelipeds pointed at tip. (Guinot 1998)
Type species: Melissa diverticulata Strahl, 1861.
Species treated:
Hypocolpus abbotti (Rathbun, 1894)
Hypocolpus haani Rathbun, 1909
Hypocolpus kurodai Takeda, 1980