Ortmann, 1897
Small animals. Eyestalks not extended beyond cornea. Exorbital corner acute, antero-laterally directed. Stridulating ridge on inner surface of palm of major chela composed of about 44-57 narrow striae, overreaching ventrally the midline of immovable finger. Small chela with tip rounded to truncate. Anterior faces of propodi of second and third pereiopods with a longitudinal row of hairs in midline. Male first pleopod slender, its distal part slightly tapering, clearly bent laterally, palp small and knob-shaped, very much behind tip. Opercle of female genital duct prominent, knob-shaped, vulva-opening oblique with respect to median line of sternum, clearly impressed, lateral rims not elevated. (Türkay 1995)
Type locality: Shimoda, Izu Peninsula, Japan.
Range: Japan - (de Haan, 1835), Tokyo Bay (Ortmann, 1894a), Shimoda (Ortmann, 1897b, Stimpson, 1907, Sakai, 1935), Sagami Bay, Ito, Shimoda, Kii Peninsula and Nagasaki (Sakai, 1939), Sagami Bay (Sakai, 1965b), from Iwate Prefecture to Kyushu on Pacific side, from Shonai Province to Yamaguchi Prefecture on Japan Sea side (Sakai, 1976a), Amakusa (Yamaguchi et al., 1976), Yamagata Prefecture (Suzuki S., 1979), Fukuoka (Miyake, 1983); Korea - Pohang, Yeon-il, Hyeobjae, Pyoseon, Seongsanpo, Daecheon, and Deogjeog Island (Kamita, 1941), Daecheon, Deogjeog Island, Anmyeon Island, Jeju, Moseulpo, Pyoseon, Daeheugsan Island, Bi-geum Island, Hae-undae, Bangjugpo, and Sorog Island (Kim, 1973); China - Bo Hai and Shandong Peninsula (Shen, 1932), Hainan Island (Shen, 1936), Shanghai, Ningbo, Fuzhou, Liuwutien, Tsimei, Xiamen, and Hainan Island (Shen, 1940b), Guangdong, Fujian, Shandong Peninsula and Bohai Bay (Dai & Yang, 1991); Taiwan - Tan-shui (Sakai, 1939, Lin, 1949), Lan-Yan Creeks, Dan-Shui River, Wu Creek, Mi-Tou and Nan-Wan (Huang et al., 1992); sand beach.