Assiminea estuarina Habe, 1946

Qi, Lu, Xu, Biyang, Kong, Lingfeng & Li, Qi, 2023, Checklist of the micromolluscs in the intertidal zone of the Yellow Sea and Bohai Sea, China, Biodiversity Data Journal 11, pp. 105444-105444 : 105444

Assiminea estuarina Habe, 1946

Native status

Lives on mud bottoms in brackish water areas of estuaries.

Distribution

China, Japan.

Notes

The genus Assiminea H. & A. Adams, 1865 is cosmopolitan, but most of them are from the Indo-pacific Region. A. estuarina is rarely found in China. The shell of this species is similar to A. hiradoensis Habe, 1942, but there are some differences between them. Each whorl of A. estuarina is more convex than A. hiradoensis . The height of the spire of A. hiradoensis is higher.

Diagnosis

Shell minute (2.2 ± 0.36 mm in length, 1.5 ± 0.08 mm in width), globose-conic, solid (Fig. 9 ). Whorls 5, spire low, each whorl weakly convex in spire, body whorl large and more convex, with impressed suture. Surface smooth, with many fine axial growth threads, yellowish, with 2 brown bands on body whorl. Aperture large, simple, ovate, columellar lip of aperture pale brown, but inner lip dark purplish-brown. Early whorls of teleoconch without spiral ribs.

Figures

Figure 9. Assiminea estuarina Habe, 1946.