| Rissoidae () |
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benthic; marine |
| Northwest Pacific: China. |
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Shell minute, ovate-conical, thin, with weakly convex whorls, nonumbilicate. Umbilicus chink very narrow and slit-like. Aperture oval, broadly rounded anteriorly, slightly angled posteriorly; peristome simple; outer lip orthocline, without varix. Periostracum thin. Characterized by unique features, such as teleoconch with subobsolete cords and the protoconch paucispiral, sculptured with micro pits and lamellae between spiral lirae. |
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Not Evaluated (N.E.) Ref. 123251)
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