# Mainstream river snail

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The **mainstream river snail**, also known as the **onyx rocksnail**, [scientific name](/source/Scientific_name) ***Leptoxis praerosa***, is a [species](/source/Species) of [freshwater snail](/source/Freshwater_snail) with a gill and an [operculum](/source/Operculum_(gastropod)), an [aquatic](/source/Aquatic_animal) [gastropod](/source/Gastropod) [mollusk](/source/Mollusk) in the family [Pleuroceridae](/source/Pleuroceridae). This species is [endemic](/source/Endemism) to the United States.

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Adapted from the Wikipedia article [Mainstream river snail](https://en.wikipedia.org/wiki/Mainstream_river_snail) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Mainstream_river_snail?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.