(de Man, 1906)
Unusual form of carapace, the branchial regions being abnormally inflated and swollen. Carapace and chelipeds are smooth and non-granular. (T. Sakai, 1976: 268)
Type locality: Japan - probably Seto-naikai.
Range: Japan - probably Seto-naikai (Sakai, 1976a), Kumano-nada (Sakai, 1983).