Thompson, F. G. (1982). The Helicina umbonata complex in the West Indies (Gastropoda, Prosobranchia, Helicinidae). Bulletin of the Florida State Museum, Biological Sciences. 28(1): 1-23.
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Thompson, F. G.
1982
The <i>Helicina umbonata</i> complex in the West Indies (Gastropoda, Prosobranchia, Helicinidae).
Bulletin of the Florida State Museum, Biological Sciences