†Pyrgulopsis blainica Hershler, Liu & Gustafson 2008

Hershler, Liu & Gustafson 2008. A second species of Pyrgulopsis (Hydrobiidae) from the Missouri River basin, with molecular evidence supporting faunal origin through Pliocene stream capture across the northern continental divide. Journal of Molluscan Studies, 74(4), November 2008: 403-413