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): 171 [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]
basis of record
Crandall, O. A. (1901). The America Physae. <em>The Nautilus.</em> 15(4): 42-45, plate 2., available online at https://www.biodiversitylibrary.org/page/1738423
page(s): 45 [details]
additional source
Baker, F. C. (1900). A revision of the physae of northeastern Illinois. <em>The Nautilus.</em> 14(2): 16-24, text-figures 1-7 [June]., available online at https://www.biodiversitylibrary.org/page/42800074
page(s): 19-22, text-figures 3-5 [details]
additional source
van Hyning, T. (1904). A molluscan stampede. <em>The Nautilus.</em> 18(3): 31-32, text-figure., available online at https://www.biodiversitylibrary.org/page/1817000 [details]
additional source
Hinkley, A. A. (1912). Notes on <i>Physa gyrina</i>. <em>The Nautilus.</em> 25(9): 108., available online at https://www.biodiversitylibrary.org/page/1818299 [details]
additional source
Stearns, R. E. C. (1889). Notes on <i>Physa triticea</i> of Lea; its relations and comments on the variation, etc., of Physae. <em>The Nautilus.</em> 3(5): 49-51., available online at https://www.biodiversitylibrary.org/page/12596456 [details]
additional source
Agersborg, H. P. K. (1932). The relation of temperature to continuous reproduction in the pulmonate snail, <i>Physa gyrina</i> Say. <em>The Nautilus.</em> 45(4): 121-123., available online at https://www.biodiversitylibrary.org/page/8527958 [details]
additional source
Ingram, W. M. (1941). A winter thaw as a factor in reducing a fresh-water mollusk population. <em>The Nautilus.</em> 55(1): 32., available online at https://www.biodiversitylibrary.org/page/8519931 [details]
additional source
Elrod, M. J. (1902). Collecting shells in Montana. <em>The Nautilus.</em> 15(9): 103-104; 15(10): 110-112; 15(11): 129-130., available online at https://www.biodiversitylibrary.org/page/1738492
page(s): 112 [details]
additional source
Carpenter, H. F. (1902). The shell-bearing Mollusca of Rhode Island. <em>The Nautilus.</em> 15(9): 103-107; 15(10): 113-115; 15(11): 130-132; 16(2): 17-18., available online at http://biodiversitylibrary.org/page/1754290
page(s): 17-18 [details]
From editor or global species database