Trochita helicoidea G.B.
Sowerby II, 1883 (original combination) Calyptraea helicoidea is a species of sea snail, a marine gastropod mollusk in the family Calyptraeidae, the slipper snails or slipper limpets, cup-and-saucer snails, and Chinese hat snails.
[1] This marine species occurs off Port Elisabeth and East London, South Africa.
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