Two New Species of Chamalycaeus (Gastropoda: Alycaeidae) from Miyazaki Prefecture, Southeastern Kyushu, Japan

Abstract

Two new species of alycaedid gastropods collected from Miyazaki Prefecture, Southeastern Kyushu, Japan, are described: Chamalycaeus shiibaensis and C. nishii. The former species is morphologically most similar to C. sadoensis (Pilsbry & Hirase, 1903), from which it is distinguishable in having fine ribs behind the aperture and by the shape of the unreflected peristome. The latter species resembles C. takahashii Habe, 1976 and C. tsushimanus (Pilsbry & Hirase, 1909), but differs from them by its smaller size and a swelling on the neck.