Epitonium scalare
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Epitonium scalare, common name the precious wentletrap, is a predatory or ectoparasitic species of marine gastropod with an operculum, in the family Epitoniidae, the wentletraps.
Epitonium scalare
Naturalis Biodiversity Center ZMA.MOLL.347109 Epitonium scalare
Operculum (gastropod)
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An operculum is a corneous or calcareous anatomical structure like a trapdoor that exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails, including the Hel
Shell of marine snail Lunella torquata with the calcareous operculum in place
Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place
Penion sulcatus near Goat Island, New Zealand, with a damaged operculum
A photo of an individual of the freshwater snail species Bithynia tentaculata showing how the back of the shell rests on the round operculum on top of the foot as the snail moves along