Checklist of the micromolluscs in the intertidal zone of the Yellow Sea and Bohai Sea, China Author Qi, Lu https://orcid.org/0000-0002-8939-9390 Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China Author Xu, Biyang Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China Author Kong, Lingfeng https://orcid.org/0000-0001-5263-1697 Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China & Sanya Oceanographic Institution, Ocean University of China, Sanya, China & Laboratory for Marine Fisheries Science and Food Production Processes, Laoshan Laboratory, Qingdao, China klfaly@ouc.edu.cn Author Li, Qi Laboratory for Marine Fisheries Science and Food Production Processes, Laoshan Laboratory, Qingdao, China & Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China & Sanya Oceanographic Institution, Ocean University of China, Sanya, China text Biodiversity Data Journal 2023 2023-07-07 11 105444 105444 http://dx.doi.org/10.3897/BDJ.11.e105444 journal article http://dx.doi.org/10.3897/BDJ.11.e105444 1314-2828-11-e105444 B501C317FB6355009DE70D45CB0F336C 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.