Helminthoglypta diabloensis explained

Helminthoglypta diabloensis, or the silky shoulderband snail, is a North American species of air-breathing land snail. It is found in California, including the California Coast Ranges, Diablo Range, and other areas in Alameda, Contra Costa, Santa Clara, Yolo, Colusa and Napa Counties.^{[1] [2]} The shell of H. diabloensis is described as having six to seven tightly coiled whorls.^[3]

This snail was previously described as Helix diabloensis.^[4]

Further reading

• Cooper, J.G. (1869). On the distribution and localities of west coast helicoid land shells, &c. American Journal of Conchology, 4(4): 211-24

Notes and References

1. Book: Binney, William Greene. A Manual of American Land Shells. U.S. Government Printing Office. 1885. 135.
2. Book: Southern California Academy of Sciences . Bulletin of the Southern California Academy of Sciences . 1902 . Los Angeles, Calif. : The Academy . LuEsther T. Mertz Library New York Botanical Garden.
3. Pilsbry . Henry A. . 1926 . Land Mollusks (Helicidae) from Central and Northern California . Proceedings of the Academy of Natural Sciences of Philadelphia . 78 . 477–488 . 4063960 . 0097-3157.
4. Web site: WoRMS - World Register of Marine Species - Helminthoglypta diabloensis (J. G. Cooper, 1869). December 30, 2021. marinespecies.org.