Roth, B. (1987). A new species of Helminthoglypta (Gastropoda: Pulmonata) from the north coast ranges of California, with observations of the spermatophore. The Wasmann Journal of Biology, 44(1-2): 57-65.
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Roth, B.
1987
A new species of Helminthoglypta (Gastropoda: Pulmonata) from the north coast ranges of California, with observations of the spermatophore.