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Wemersoniellidae is a family of molluscs belonging to the order Gadilida, which contains small tusk shells.
This family has six species known to be extant, which are in two genera that the family encompasses.
Compared to the mollusk families Dentaliida and Entalinidae, Wemersoniellidae have an additional set of muscles that control retraction of their pedal. In Wemersoniellidae, and all members of the family Gadilida, the elongation movement of the foot is completely hydraulics and has no muscle-based component, as it does in the family Dentaliida. Correspondingly, the other muscles controlling the pedals in Wemersoniellidae are reduced.
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