semisulcospira libertina #올갱이 x Olgaeng i
Mollusks in Peril — Freshwater Mollusks in Peril
Semisulcospiridae, common name semisulcospirids, is a family of freshwater snails, aquatic gilled gastropod mollusks with an operculum, in the superfamily Cerithioidea.
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