^ abJohnson, Paul D.; Bogan, Arthur E.; Brown, Kenneth M.; Burkhead, Noel M.; Cordeiro, James R.; Garner, Jeffrey T.; Hartfield, Paul D.; Lepitzki, Dwayne A. W.; Mackie, Gerry L.; Pip, Eva; Tarpley, Thomas A.; Tiemann, Jeremy S.; Whelan, Nathan V. & Strong, Ellen E. (2013). "Conservation status of freshwater gastropods of Canada and the United States". Fisheries. 38 (6): 247–282. doi:10.1080/03632415.2013.785396.