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Scanning electron micrographs of shells of the Columbia duskysnail (A USNM 1256484) and C. greggi (B USNM 905375) having similarly sized spires. Scale bar: 1.0 mm. |
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| 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 |