Assiminea japonica is a species of small operculate snail, a marine gastropod mollusc or micromollusc in the family Assimineidae.
Description The length of the shell attains 7 mm, its diameter 5 mm.
(Original description in Latin) The shell is lacks an umbilicus and convexly conical. It is rather solid, striate, and lacks any impressed spiral lines. The color is blackish-olive. It has 4½ rather convex whorls, which are separated by a sufficiently deep suture. The upper whorls are eroded. The body whorl is faintly angulate, and its base is slightly convex. The aperture is moderately oblique and pear-shaped. It is sharp above. The peristome is blunt and straight. The inner lip is thickened and whitish.
Distribution This terrestrial species occurs in brackish waters in Japan and Korea.
References
Habe, T. (1942). Classification of Japanese Assimineidae. Venus. 12(1–2): 32–56, pls 1–4. page(s): 39, pl. 1, fig. 2; pl. 4, fig. 13 Fukuda H. & Hasegawa K. (2017). Family Assimineidae. Pp. 813–816, in: T. Okutani (ed.), Marine Mollusks in Japan, ed. 2. 2 vols. Tokai University Press. 1375 pp Tashiro, M.; Tomiyama, K.; Morino, H. (2001). Distribution of the Brackish Water Snail, Assiminea japonicα Martens (Gastropoda: Assimineidae) along Hinuma Water System, Middle Japan, with a Comparison of Population Structure between Observation Sites. Venus (Journal of the Malacological Society of Japan). 60 (1–2): 79–9 Okutani T., ed. (2000) Marine mollusks in Japan. Tokai University Press. 1173 pp. Liu, J.Y. [Ruiyu] (ed.). (2008). [Checklist of marine biota of China seas]. China Science Press. 1267 pp.
External links Biolib.cz: image