Pilsbry (1940) recognized four subspecies of Vespericola columbianus, in addition to the nominal subspecies, but most of these are now believed to be distinct species by Roth and Miller (1993). Until that revision, many authors identified British Columbia, Washington, and Alaska records as the subspecies “pilosa” under the misbelief that V. columbianus lacks periostracal hairs. Until the publication by Roth and Miller (1993) literature frequently cited British Columbia, Washington and Alaska records as V. columbianus pilosus (Henderson, 1928). However, based primarily on genital anatomy, Roth and Miller (1993). Based on newly discovered anatomical characters, as well as subtle differences in shell morphology, Roth and Miller (1993) demonstrated that V. pilosus (Henderson, 1928) is a distinct species that occurs in the vicinity of San Francisco. They provisionally called all Vespericola from Alaska, British Columbia and Washington V. columbianus.
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