Table 2 in Integrative taxonomy confirms the synonymy of three springsnail species (Hydrobiidae: Pyrgulopsis)

Table 2. Lateral cusp counts of central radular teeth (number of teeth with cusps visible for counting = N of teeth with cusps counted) in each direction (Lat1 and Lat2). Mean and standard deviation (SD) given. PopulationN of teeth with cusps countedMean Lat1SD Lat1Mean Lat2SD Lat2NW Lakota (P. pilsbryana)36.080.073.670.58Ninemile (P. nonaria)1954.491.393.801.28Sixmile (P. transversa)1335.480.815.261.11Vernon84.881.644.881.25Big Springs65.330.825.830.98