MolluscaBase taxon details
original description
(of Helix fraterna Say, 1824) Say, T. (1824). Class Mollusca. In: Narrative of an expedition to the source of St. Peter's River, Lake Winnepeek, Lake of the Woods, &c. &c. performed in the year 1823, by order of The Hon. J.C. Calhoun, Secretary of War, under the command of Stephen H. Long, Major U. S. T. E. compiled from the notes of Major Long, Messrs Say, Keating, and Calhoun, by William H. Keating, A. M. &c. H.C. Carey & I. Lea, Philadelphia. 2: 256-266, plates 14-15, available online at http://biodiversitylibrary.org/page/13640689
page(s): 257, pl. 15, fig. 3 [details]
original description
(of Helix convexa Deshayes, 1830) Deshayes, G. P. (1830-1832). <i>Encyclopédie méthodique ou par ordre de matières. Histoire naturelle des Vers et Mollusques</i>. Vol. 2: viii+1-594 [part 1: i-vi, 1-256, Livraison 101, 1 Feb 1830; part 2: 1-144, Livraison 101, 1 Feb. 1830; 145-594, Livraison 102, 29 Sept. 1832]. Vol. 3: 595-1152 [Livraison 102, 29 Sept. 1832]. , available online at https://doi.org/10.5962/bhl.title.8638
page(s): 253 [details]
original description
(of Polygyra monodon cava Pilsbry & Vanatta, 1911) Pilsbry, H. A. & Vanatta, E. G. (1911). <i>Polygyra monodon cava</i> n. subsp. <em>The Nautilus.</em> 25(1): 12., available online at https://www.biodiversitylibrary.org/page/1818260
page(s): 12 [details]
original description
(of Polygyra fraterna var. albida B. Walker, 1906) Walker, B. (1906). An illustrated catalogue of the Mollusca of Michigan. Part 1. Terrestrial Pulmonata (land snails). <em>Report for 1905, State Board of Geological Survey.</em> 1905: 432-537., available online at https://www.biodiversitylibrary.org/page/36110280
page(s): 471 [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]