(A. Milne Edwards, 1869)
Carapace covered with a dense short tomentum; transverse granular lines on frontal (very indistinct), protogastric and mesogastric regions, epibranchial line interrupted at the cervical groove and across midline; front with 6 acute triangular teeth with dark tips, medians the most prominent; antero-lateral borders with 6 teeth, first smallest with slightly concave lateral border, acute at tip, third largest, sixth acute, directed antero-laterally; postero-lateral junctions rounded. Antennal flagellum excluded from orbit. Chelipeds quite hairy; merus with 3 strong spines on anterior border, posterior border smooth; carpus with a strong internal spine, outer border with 3 spinules; palm with 5 spines on upper border. Merus of swimming leg with a subdistal posterior spine, propodus with a row of spinules on posterior border. (Türkay 1995)
Antennal flagellum excluded from orbital hiatus; frontal teeth very acute; posterior border of cephalothorax curved, forming curved postero-lateral junction; 6 antero-lateral teeth, first antero-lateral tooth not truncate, second antero-lateral tooth about as large as first; no distinct cardiac ridges on carapace; carpus of fifth leg without a spine. (Davie 1999)
Type locality: Japan.
Range: Japan - (A. Milne Edwards, 1869), Tokyo Bay (Ortmann, 1893), Shimoda (Sakai, 1935, 1939), Yokohama (Leene, 1938), Sagami Bay (Sakai, 1965b), Munakata Ohshima (Minei, 1971), Sagami Bay, Shimoda, Wagu, Kii Nagashima, Kii Minabe, Nada, and Kushimoto (Sakai, 1976a), Yamagata Prefecture (Suzuki S., 1979), Manazuru, Mikawa Bay, Wagu, Kii Nagashima, Yuasa-cho, Gobo, and Kii Minabe (Muraoka, 1998); Korea - Cheju-do (Kamita, 1941), Seogwipo, Jeju, Gapa Island, and Hae-undae (Kim, 1973), Cheju, Sogwipo, Taep'o, and Piyangdo, Cheju-do (Kim & Chang, 1985); Taiwan - Taiwan Strait (Stephenson, 1972a), Chi-lung and I-lan Province (Huang & Yu, 1997); China - Hong Kong (Shen, 1934), Guangdong and Fujian (Dai & Yang, 1991); 10-20 m.