This species has also been known under the name Drepanostoma camerani (Lessona, 1880).

This species is endemic to north-western Italy. It is known from five locations. A dramatic decline of this species has been observed in the Valle del Cervo since the 1960s (Manganelli et al. 2001). But during the last 20 years, living specimens or fresh shells have been found back in that area by E. Gavetti, S. Birindelli and an anonymous collector. Although some areas of the Val Sessera have recently been subject to extensive road and forest road construction (Camerano 2006), the new finding sites in the Val Sessera by R. Sindaco seem at present to have been exposed to little disturbance. Also other sites don't seem particularly threatened due to their remoteness. Therefore the assessment for this species is changed from Critically Endangered (CR) in 2001 to Vulnerable (VU) D2.

This species is endemic to northwestern Italy. It is known from five locations only:
– Colle della Mologna piccola, versante di Gressoney 2000 m, Valle d‘Aosta, autonomous Region (Lessona 1880)
– Piedicavallo, Valle del Cervo, Provincia Biella, Piemonte (Pollonera 1885)
– Rosazza, contorni, Valle del Cervo, Provincia Biella, Piemonte (Pollonera 1885); confirmed also in the last decade by S. Birindelli
– Vallone di Valdobbia in Valsésia, Provincia Vercelli, Piemonte (Pollonera 1885)
– Bocchetto Sessera, env. (Sindaco et al. 2008); refound by R. Sindaco in 2009

The population size and trend are unknown. The species’ densities are apparently very low, and it is not easy at all to find living animals (nor dead shells).

The inhabited area is a very wild alpine area, with rocky mountains, intermixed with large scree and boulders of acidic rocks; at lower altitudes broadleaf woods are present. The species was also found on concrete walls.

Acid precipitation is possibly a threat (Manganelli et al. 2001). Some areas of the Val Sessera have recently been subject to forest road construction.

This species is not used.

There are no conservation measure for this species. It had been assessed as Critically Endangered (CR) by Manganelli et al. (2001); this assessment has also been incorporated in the subsequent versions of "The IUCN Red List of Threatened Species".