Rathbun, 1916
Carapace suboval, branchial margin smooth or with an indistinct tubercle or tubercles; rostrum about 1/6 postrostral carapace length; postorbital and hepatic lobes very short and subequal; small (about 14 mm carapace length), deep water species. (Davie 1996)
Type locality: between Gillolo and Makyan Islands, Indonesia, 0°12'15"N, 127°29'30"E.
Range: Japan - Tosa Bay (Sakai, 1976a); Indonesia - between Gillolo and Makyan Islands (Rathbun, 1916).