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Yokoya, 1928

According to Yokoya, the dorsal surface of carapace of this species is less markedly tuberculated excepting six tubercles on the gastric region. The pseudorostral spines are parallel but not in contact with each other and are much smaller than those of Oregonia gracilis, being about one fourth the length of the carapace. The hepatic regions are more strongly produced laterally. Chelipeds of male are very slender and shorter than ther ambulatory legs, the fingers being almost as long as the palm. The terminal segment of male abdomen obtusely acuminate, not emarginate as that of the former species. (Sakai, 1938: 232)

Type locality: Mutsu Bay, Japan.
Range: Japan - Mutsu Bay (Yokoya, 1928), between Shiriya-zaki and Todo-saki, between Todo-saki and Kinkazan, and east of Shioya-zaki (Yokoya, 1933).

Oregonia mutsuensis