button shell

References

button shell

gastropod family

Also known as: Modulidae

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gastropod
Classification
… (Vermetidae), horn shells (Potamididae), and button shells (Modulidae). Superfamily Strombacea Foot and operculum greatly modified and move with a lurching motion; feed on algae and plants; some species used for human food; conchs (Strombidae) of tropical oceans and the pelican’s foot shells (Aporrhaidae) of near Arctic waters.
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… (Vermetidae), horn shells (Potamididae), and button shells (Modulidae). Superfamily Strombacea Foot and operculum greatly modified and move with a lurching motion; feed on algae and plants; some species used for human food; conchs (Strombidae) of tropical oceans and the pelican’s foot shells (Aporrhaidae) of near Arctic waters.
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