A systematic review of the hydrobiid snails (Gastropoda: Rissooidea) of the Great Basin, Western United States. Part 2. Genera Colligyrus, Eremopyrgus, Fluminicola, Pristinicola, and Tyronia. Veliger, 42(4), October 1 1999: 306-337. 306 [Zoological Record Volume 136]