Lirularia iridescens Schrenck, 1863

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

Lirularia iridescens Schrenck, 1863

Native status

Found on seagrass between tidal and shallow waters.

Distribution

Yellow Sea of China; Japan Sea, South Kurile Islands.

Notes

L. iridescens was recorded by Kantor and Sysoev (2006). Okutani (2017) described and illustrated in detail L. iridescens . In this study, the species was re-described, based on the SEM. Crater-like pitted microsculptures on the protoconch were first discovered here. At present, there are very few morphological studies on this genus Lirularia . Many studies have shown that L. iridescens are phytal gastropods inhabiting seaweeds ( Toyohara et al. 1999, Agatsuma et al. 2005).

Diagnosis

Shell minute (2.5 ± 0.26 mm in width, 2.2 ± 0.15 mm in length), ovato-conica. Whorls 4-5, spire low, body whorl rather ventricose (Fig. 2 ). Suture distinct. Every whorl is striated by about 9-10 distinct spiral ribs and the distance between the spiral ribs is not uniform. Reddish-brown spiral ribs contrasting with iridescent interspaces; lines on ribs occasionally broken by white spots, with crater-like pitted microsculpture on protoconch. Aperture ovate, outer lip thin, with small notches, inner lip simple and slightly convex. Umbilicus circular deep. Basal surface flat, with 9-10 circular spiral ribs.

Figures

Figure 2. Lirularia iridescens Schrenck, 1863.