MolluscaBase taxon details
original description
(of Helix wilhelmi L. Pfeiffer, 1866) Pfeiffer, L. (1866). Beschreibung neuer Landschnecken. <em>Malakozoologische Blätter.</em> 13(2): 76-91 [April 1866].
page(s): 79-80 [details]
basis of record
Thompson, F. G. (2011). An annotated checklist and bibliography of the land and freshwater snails of México and Central America. <em>Florida Museum of Natural History Bulletin.</em> 50(1): 1-299. [details] Available for editors [request]
additional source
van der Schalie, H. (1948). The land and fresh-water mollusks of Puerto Rico. <em>Museum of Zoology, University of Michigan, Miscellaneous Publications.</em> no. 70: 1-134. (Ann Arbor).
page(s): 70-71, pl. 6, figs. 4a-b [details] Available for editors [request]
additional source
Baker, H. B. (1940). Some Antillean Sagdidae or Polygyridae. <em>The Nautilus.</em> 54(2): 54-62, pls. 4-5., available online at https://www.biodiversitylibrary.org/page/8519205
page(s): 57 [details]