MolluscaBase name details
original description
(of Helix concava Say, 1821) 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): 159 [details]
basis of record
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): 29 [details]
additional source
Nylander, O. O. (1908). Additional shells found in Aroostook County, Maine. <em>The Nautilus.</em> 22(2): 19., available online at https://www.biodiversitylibrary.org/page/1743528 [details]
additional source
Baker, H. B. (1912). Notes on <i>Circinaria concava </i> (Say) from Sheboygan County, Michigan. <em>The Nautilus.</em> 26(1): 3-4., available online at https://www.biodiversitylibrary.org/page/1738198 [details]
additional source
Vanatta, E. G. (1903). Notes on some shells from North Carolina. <em>The Nautilus.</em> 16(9): 106. [details]