Turbonilla osyuensus Nomura, 1936

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

Turbonilla osyuensus Nomura, 1936

Native status

Found on sandy mud bottoms of seagrass beds.

Distribution

Bohai Sea of China, Japan.

Notes

Chemnitzia osyuensis (Nomura, 1936) is the type specimen and a synonym. Very similar to T. gracilenta , but differs in the protoconch rotated right ( Higo and Goto 1993).

Diagnosis

Shell minute (3.8 ± 0.13 mm in height, 1.0 ± 0.21 mm in width), towered, moderately solid, white (Fig. 17 ). Whorls about 10, each whorl with convex sides. Sutures constricted. Axial ribs oblique and straight, terminating at periphery. Interspaces of axial ribs twice as wide as ribs, the axial rib of the upper whorl is aligned with the interspace of the lower whorl. Aperture simple, upper of the outer lip with angular, columella with no folds, basal lip circle. The apex of the protoconch is composed of two parts of different sizes.

Figures

Figure 17. Turbonilla osyuensus Nomura, 1936.