Fissurella

mollusk genus

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June 26, 2026

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Fissurella is a genus of marine gastropods, commonly known as keyhole limpets. These mollusks are characterized by a conical shell that features an opening at its apex. This distinctive perforation gives them their common name. The genus Fissurella belongs to a cosmopolitan family of marine gastropods called Fissurellidae.12

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gastropod
Size range and diversity of structure
…a limpet shape, as in Fissurella. Often a number of such shell shapes can be found among species within a single family, but such marine families as the Terebridae, Conidae, and Cypraeidae are conservative in shape. Shells of different species vary markedly in thickness, and those of many species bear…
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…a limpet shape, as in Fissurella. Often a number of such shell shapes can be found among species within a single family, but such marine families as the Terebridae, Conidae, and Cypraeidae are conservative in shape. Shells of different species vary markedly in thickness, and those of many species bear…
Read More