Traits taxon details
original description
Shuttleworth, R. J. (1854). Beiträge zur näheren Kenntniss der Land- und Süsswasser-Mollusken der Insel Portorico (Schluss). <em>Mittheilungen der Naturforschenden Gesellschaft in Bern.</em> 1854 (321/322): 89-103., available online at https://www.biodiversitylibrary.org/page/11231354 page(s): 93 [details]
basis of record
Thompson, F. G. (1987). A review of the land snails of Mona Island, West Indies. <em>Bulletin of the Florida State Museum, Biological Sciences.</em> 31(2): 69-106., available online at https://www.floridamuseum.ufl.edu/wp-content/uploads/sites/35/2017/03/Vol-31-No-2.pdf [details] Available for editors 
additional source
Thompson, F. G. (1982). The <i>Helicina umbonata</i> complex in the West Indies (Gastropoda, Prosobranchia, Helicinidae). <em>Bulletin of the Florida State Museum, Biological Sciences.</em> 28(1): 1-23., available online at https://www.floridamuseum.ufl.edu/wp-content/uploads/sites/35/2017/03/Vol28No1.pdf [details] Available for editors 
additional source
Martens, E. von. (1877). Land- und Süsswasser-Schnecken von Puerto Rico. <em>Jahrbücher der Deutschen Malakozoologischen Gesellschaft.</em> 4(3): 340-362, pl. 12, figs. 2-8., available online at https://www.biodiversitylibrary.org/page/16297195 page(s): 355 [details]
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