Map of the northwestern United States showing the collecting localities for Colligyrus samples used in the molecular analysis. Specimen codes are from Table 1.

 
 
  Part of: Liu H-P, Hershler R, Rossel CS (2015) Taxonomic status of the Columbia duskysnail (Truncatelloidea, Amnicolidae, Colligyrus). ZooKeys 514: 1-13. https://doi.org/10.3897/zookeys.514.9919