subspiral
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subspiral — adj.; subspirally, adv … Useful english dictionary
New Zealand mud snail — This article is about the invasive mudsnail Potamopyrgus antipodarum. For another mud snail from New Zealand, see Amphibola crenata. New Zealand mudsnail Lateral view of a Potamopyrgus antipodarum shell Conservat … Wikipedia
Operculum (gastropod) — Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place … Wikipedia
