About Helminthoglypta diabloensis (J.G.Cooper, 1869)
Helminthoglypta diabloensis, commonly known as the silky shoulderband snail, is a North American species of air-breathing land snail. It is found in California, with populations documented in the California Coast Ranges, the Diablo Range, and parts of Alameda, Contra Costa, Santa Clara, Yolo, Colusa, and Napa Counties. The shell of this species has six to seven tightly coiled whorls. This species was originally formally described under the scientific name Helix diabloensis.
