Alveinus ojianus Yokoyama, 1927

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

Alveinus ojianus Yokoyama, 1927

Native status

Found on sandy mud bottoms in upper sublittoral zones.

Distribution

Yellow Sea and Bohai Sea of China, southern Japan.

Notes

Spaniodon Reuss, 1867 was considered a senior synonym of Alveinus Conrad, 1865, containing only Alveinus miliaceus (Issel, 1869) and Alveinus ojianus (Yokoyama, 1927) in WoRMS. A. miliaceus is very similar to A. ojianus in shell characters, but differs in the cardinal tooth. The cardinal teeth bifurcate into two lamellae ( Conrad 1865).

Diagnosis

Shell minute (1.1 ± 0.17 mm in length, 1.0 ± 0.22 mm in height), triangular-ovate, inflated, equivalved (Fig. 20 ). Umbo prominent, almost situated at the middle of the dorsal margin. Anterior and posterior ends round. Surface smooth and yellowish, ornamented by densely-spaced co-marginal lamellae. Hinge plate with one anterior and one posterior cardinal tooth in the left valve and one cardinal tooth in the right ligament external parivincular, with small resilium.

Figures

Figure 20. Alveinus ojianus (Yokoyama, 1927).