MolluscaBase taxon details
original description
(of Polygyra fosteri var. hubrichti F. C. Baker, 1937) Baker, F. C. (1937). A new Pleistocene race of <i>Polygyra appressa</i>. <em>The Nautilus.</em> 51(1): 23-24., available online at https://www.biodiversitylibrary.org/page/9203216 page(s): 23 [details]
original description
(of Triodopsis (Xolotrema) fosteri f. missouriensis Pilsbry, 1940) Pilsbry, H. A. (1940). Land Mollusca of North America (north of Mexico). Volume I Part 2. <em>The Academy of Natural Sciences of Philadelphia Monographs.</em> 3: i-vii, 575-994, i-ix. Philadelphia [1 August]. page(s): 833, fig. 487j [details]
original description
(of Polygyra appressa var. fosteri F. C. Baker, 1932) Baker, F. C. (1932). A new race of <i>Polygyra appressa</i> from Illinois. <em>The Nautilus.</em> 46(2): 48-49., available online at https://www.biodiversitylibrary.org/page/8519394 [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
Lee, H. G. (2010). Gettleman key to probe of major reversals. <em>American Conchologist.</em> 38(4): 6-11., available online at https://conchologistsofamerica.org/wp-content/uploads/2019/01/38-dec-2010.pdf page(s): 9, 11, fig. 13 (also listed as Fig. 12) [details]
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