A New Specie of the Genus Zafra from Amami-Oshima, South of Kyushu, Japan with a New Subgenus (Columbellidae)

Abstract

A new species of the genus Zafra, Z. yukitai is distinguished from two other species, Z. divaricata Pilsbry and Z. albomarginata Okamoto & Habe in having much smaller shell ornamented with two white bands along the suture and on the periphery of the body whorl. These three species comprise a new subgenus Mokumea by peculiar ornamentation.