Type Material of the Land Snail Helminthoglypta exarata Pfeiffer 1857)
Type material of the land snail Helminthoglypta exarata (Pfeiffer, 1857) by Barry Roth, Bull. Southern California Acad. Sci., 80(3): 126-130, 1981. Alectotype (American Museum of Natural History 56076) is designated for Helminthoglypta exarata. Evidence for the species' occurrence in the Santa Clara Valley, California, is reviewed, and the floor of the Santa Clara Valley east of Agnew, between Guadalupe River and Coyote Creek, is designated as the type locality. Other type material in Helminthoglypta that has come to light since 1939 is summarized.
"Type Material of the Land Snail Helminthoglypta exarata Pfeiffer 1857),"
Bulletin of the Southern California Academy of Sciences:
Available at: https://scholar.oxy.edu/scas/vol80/iss3/3