R. Hershler, H.-P. Liu, and J. J. Landye, “New species and records of springsnails (Caenogastropoda: Cochliopidae: Tryonia) from the Chihuahuan Desert (Mexico and United States), an imperiled bio-diversity hotspot”, Zootaxa, vol. 3001, no. 1, pp. 1–32, Aug. 2011.