A New species of Aperiovula (Gastropoda : Ovulidae) Collected near the Boso Peninsula, Japan

Abstract

An ovulid gastropod collected from off the Boso Peninsula in Honshu, Japan, is described as a new species Aperiovula aurora. It is morphologically most similar to Aperiovula jeanae Cate, 1973, from which it can be distinguished by its thinner and translucent shell and callously produced posterior terminal ; the sharper and stronger denticles on the narrower outer lip ; the wider aperture, and the lack of both a yellowish marginal line and a funiculum.