"Status of current distribution is unknown. As of Taylor's (1988) species-description, 16 scattered sites had been identified in North America located in, SK, MT, UT, CO, ID, WY, and OR. Historically, this species probably ranged from southern Canada through the Pacific Northwest and the Rocky Mountain States lying east of the Cascade Mountains as far as western MT, UT, and CO (Taylor, 1988; 2003)." (
British Columbia Conservation Data Centre 2012).