Sakai, 1969
Carapace covered with short hairs, 2 pairs of gastric ridges, epibranchial ridges interrupted by cervical grooves and also mesially, cardiac ridge short and obscure, mesobranchial ridges distinct; front with 6 lobes; 5 antero-lateral teeth, fourth slightly the smallest, fifth prominent, projecting strongly sideways. Upper surface of cheliped palm with 2 spines on anterior and 2 on posterior borders, respectively. Posterior border of propodus of swimming leg spinulated. (Türkay 1995)
Type locality: Yoron-jima, Amami-shoto, Japan.
Range: Japan - Yoron-jima (Sakai, 1969, 1976).