Distribution and Morphotypes of the Federally Endangered Land Snail Helminthoglypta (Charodotes) xvalkeriana (Hemphill, 1911)

Abstract

The Morro shoulderband snail, Helminthoglypta walkeriana (Hemphill 1911), a terrestrial snail found in San Luis Obispo County, California, is listed as endangered under the U.S. Endangered Species Act. Surveys conducted by the California Department of Parks and Recreation have resulted in range clarifications, identification of new habitat associations, and evaluation of various morphological types. These results have important economic and political implications due to the protections afforded to federally listed species.