Vertigo andrusiana Pilsbry, 1899, not “Vertigo columbiana Sterki, 1892”, nomen nudum (Gastropoda: Vertiginidae)

The correct name for a common, temperate north-western North American land snail is discussed. In a 2018 revision of the genus Vertigo O.F. Müller, 1773, “Vertigo columbiana Sterki, 1892” was used for this species by its authors, who synonymised V. andrusiana Pilsbry, 1899 with it. However, V. columbiana Sterki, 1892 is a nomen nudum and, as this name is not made available until a publication in 1900 by Pilsbry and Vanatta, the earliest available name is V. andrusiana.