MolluscaBase name details
original description
(of Helix alternata Say, 1817) Say, T. (1817). Conchology. - In: Nicholson, W.: American edition of the British Encyclopedia, or, dictionary of arts and sciences comprising an accurate and popular view of the present improved state of human knowledge. First Edition, A-3 - C-6 [= 1-20], pl. [1-4].
page(s): [unpaginated], pl. 1, fig. 2 [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
Pilsbry, H. A. (1901). The subspecies of <i>Pyramidula alternata</i>. <em>The Nautilus.</em> 15(1): 6-7., available online at https://www.biodiversitylibrary.org/page/1738385
page(s): 7 [details]
additional source
Baker, F. C. (1897). On a collection of mollusks from Grand Tower, Illinois. <em>The Nautilus.</em> 11(3): 28-30., available online at https://www.biodiversitylibrary.org/page/1774602
page(s): 30 [details]
additional source
Johnson, C. W. (1900). Some notes on the land shells of western Florida. <em>The Nautilus.</em> 13(12): 141-143., available online at https://www.biodiversitylibrary.org/page/42800047
page(s): 143 [details]
additional source
Pilsbry, H. A. & Johnson, C. W. (1895). <i>Pyramidula alternata</i> and <i>Gastrodonta ligera</i>, reversed. <em>The Nautilus.</em> 9(7): 84., available online at https://www.biodiversitylibrary.org/page/1731429 [details]
additional source
Anonymous. (1896). Shells of Maryland. <em>The Nautilus.</em> 10(2): 23., available online at https://www.biodiversitylibrary.org/page/1818956 [details]