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Pistolgrip (Tritogonia verrucosa)

The Pistolgrip (Tritogonia verrucosa) is named for the shape of its bumpy shell, which resembles the handle or butt of a pistol. Historically, the pistolgrip was widespread but uncommon in the Illinois River. It may no longer exist in the Illinois, although it does live in some other streams. The pistolgrip was considered a good button shell. (Conservation Status: Currently Stable)
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