A New Species of Enotepteron (Gastropoda: Opisthobranchia: Gastropteridae) from off Niigata Prefecture, in the Sea of Japan

Abstract

A new gastropterid species, Enotepteron hayashii, collected from the Sea of Japan, is described herein. Enotepteron is a small genus characterized externally by a small globular protuberance (sphere) on the posterior edge of both parapodia. E. hayashii differs from the previously known species by the presence of a small knob-like spur on the median line of the posterodorsal end of the mantle shield. This paper represents the first record of this genus from Japan.