de Haan, 1833
Carapace uneven, tomentum worn out on raised surfaces; transverse granular lines on protogastric and mesogastric regions, epibranchial line interrupted at the cervical groove and across midline, cardiac region with 1, each mesobranchial region with 3 such lines; front with 6 teeth, medians and submedians pointed, laterals triangular with rounded tips; antero-lateral borders with 6 teeth, first truncate, remaining ones acute; postero-lateral junctions rounded. Antennal flagellum excluded from orbit. Chelipeds covered with large granules and/or squamiform markings; merus with 3 strong and 2 smaller spines and numerous granules on anterior border, posterior border granulate; carpus with a strong internal spine, outer border with 3 spinules; palm with 4 spines on upper border, lower border not longitudinally sulcate. Merus of swimming leg with a subdistal posterior spine, propodus with a variable number of denticles on posterior border. (Türkay 1995)
Antennal flagellum excluded from orbital hiatus; median and submedian frontal teeth not prominent beyond laterals; orbit with strong dorsal inclination; posterior border of cephalothorax curved, forming curved postero-lateral junction; 6 antero-lateral teeth; 2 series of ridges anterior to epibranchials; distinct cardiac and mesobranchial ridges on carapace. Outer surface of wrist of cheliped with 3 spines; hand without longitudinal sulcus on lower surface. (Davie 1999)
Type locality: Japan.
Range: ?South Africa - Durban (Barnard, 1950); Japan - (de Haan, 1833), Sagami Bay, Shima Peninsula, Kii Nagashima, Kii Minabe, and Sakaihama (Sakai, 1976a), off Kochi (Miyake, 1983), Gobo and Kii Minabe (Muraoka, 1998); Taiwan - Kaohsiung, I-lan, Ping-tung Provinces (Huang & Yu, 1997); Hong Kong (Stimpson, 1907).