Iravadia elegantula A. Adams, 1861

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

Iravadia elegantula A. Adams, 1861

Native status

Brackish water, on muddy flats and under rocks in estuary at river mouth.

Distribution

Korea, China, Japan.

Notes

The Iravadia includes the subgenera Fluviocingula Kuroda & Habe, 1954, Pseudomerelina Ponder, 1984 and Pseudonoba O. Boettger, 1902. The original description from the species Onoba elegantula A. Adams, 1861. At present, the Iravadia elegantula (A. Adams, 1861) has been accepted as Fluviocingula elegantula (A. Adams, 1861).

Diagnosis

Shell minute (3.0 ± 0.22 mm in length, 1.6 ± 0.14 mm in width), elongate conical, stout (Fig. 7 ). Whorls 5, inflated, with deeply impressed suture. Whorls increasing gradually in size. Surface of shell glossy dark brown at apical and yellowish-brown at abapical part, sculptured with many fine spiral lirae and fine growth lines. Periphery of body whorl rounded, base of whorl gradually curved. Protoconch is small, depressed dome-shape. Aperture oval and weakly angled both up and down, peristome somewhat thickened and broad down region, outer lip rounded. Umbilicus narrow and very shallow.

Figures

Figure 7. Iravadia (Fluviocingula) elegantula A. Adams, 1861.