Bosc, 1802
Small symbiotic crabs, usually living as commensals. Carapace subcircular, with rounded angles. Dorsal surface with regions poorly defined. Front, orbits and eyes minute. Third maxillipeds elongate, with ischium and merus indistinguishably fused; propodus longer than carpus; dactylus subterminal, inserted at or near the base of ventral margin of propodus, styliform, apex not extending to end of propodus. Ambulatory legs not fringed dorsally and ventrally with long setae; propodus not expanded distally in female; dactyli subequal and similar, falcate. Male telson almost as long as broad. (Guinot 1998)
Type species: Cancer pisum Linnaeus, 1767, by selection by Latreille, 1810.
Gender masculine.
Species treated:
Pinnotheres alcocki Rathbun, 1909
Pinnotheres bidentatus Sakai, 1939
Pinnotheres boninensis Stimpson, 1858
Pinnotheres corbiculae Sakai, 1939
Pinnotheres cyclinus Shen, 1932
Pinnotheres dilatatus Shen, 1932
Pinnotheres gordoni Shen, 1932
Pinnotheres haiyangensis Shen, 1932
Pinnotheres laquei Sakai, 1961
Pinnotheres parvulus Stimpson, 1858
Pinnotheres pholadis de Haan, 1835
Pinnotheres serrignathus Shen, 1932
Pinnotheres sinensis Shen, 1932
Pinnotheres sinensis atrinae Sakai, 1939
Pinnotheres taichungae Sakai, 2000
Pinnotheres tsingtaoensis Shen, 1932
Pinnotheres villosulus Guérin-Méneville, 1831