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The family Pleuroceridae belongs to the gastropod subclass Mesogastropoda, which is part of the order Monotocardia. These are freshwater snails, with many species being particularly abundant in the Tennessee and Alabama river systems in the United States.1

Gastropods, which include snails and slugs, are a diverse class of mollusks found in marine, freshwater, and terrestrial environments. They exhibit a wide range of adaptations for different habitats, from deep-sea trenches to land.123

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