Shell more cylindrical; aperture relatively smaller and rounded. 3 - 4 very small deeply-set apertural teeth, 1 parietal, 1 columellar, 1 lower palatal (sometimes absent, and sometimes an additional upper palatal). Mouth edge simple and scarcely thickened. Shell pale yellowish-brown, translucent, not glossy, but with a silky sheen due to many reguler fine growth lines.
Ecology and behaviour
North facing corries between 800m and 980m amongst short turf and low heath / scrub rich in Artic alpines.
Distribution and status
Endangered