Vespericola columbianus (I. Lea 1838) Northwest Hesperian
Polygyridae, ,Gastropoda, Mollusca, Animalia
Range: Known from all regions of western Washington from near sea-level to at least 1300 m elevation.
Identification: Juvenile specimens less than 8.5 mm diameter that lack a reflected lip and an elongate tooth are difficult to identify to species by external characters; Cryptomastix germana has more whorls per unit diameter than Vespericola columbianus.
Description: Shell brown with 5 to 6 closely coiled whorls; body pale brown; parietal tooth-like barrier rarely present.
Etymology: vespericola – dwellers in the evening or west; named for Columbian province