MolluscaBase name details
original description
Say, T. (1821). Description of univalve shells of the United States. <em>Journal of the Academy of Natural Sciences of Philadelphia.</em> 2(1): 149-179., available online at https://www.biodiversitylibrary.org/page/36831337
page(s): 154 [details]
basis of record
InvertEBase. (2018). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase (InvertEBase.org) project. [details]
additional source
Binney, W.G. (1874). On the genitalia and lingual dentition of Pulmonata. Annals of the Lyceum of Natural History of New York, 11: 20-46, plates 1-6., available online at https://www.biodiversitylibrary.org/page/16076264
page(s): 29, pl. 5, fig. 4; note: As Helix clausa [details]
additional source
Lind, G. D. (1890). <i>Helix clausus</i>. <em>The Nautilus.</em> 3(11): 132., available online at https://www.biodiversitylibrary.org/page/12596567 [details]