MolluscaBase taxon details
original description
(of Helix lineata Say, 1817) Say, T. (1817). Descriptions of seven species of American fresh water and land shells, not noticed in the systems. <em>Journal of the Academy of Natural Sciences.</em> Philadelphia 1(1): 13–16, 17–18., available online at http://archive.org/stream/journalofacademy01acaduoft#page/n21/mode/2up
page(s): 18 [details]
original description
(of Planorbis paralellus 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): 164 [details]
original description
(of Helicodiscus theresa Thiele, 1927) Thiele, J. (1927). Über einige brasilianische Landschnecken. <em>Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft.</em> 40 (3): 307-329, pl. 26. Frankfurt am Main. [details] Available for editors [request]
basis of record
Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16th, 2017. [details]
additional source
Pilsbry, H. A. (1911). Land shells of Atlantic City, New Jersey. <em>The Nautilus.</em> 25(3): 34-35., available online at https://www.biodiversitylibrary.org/page/1818213
page(s): 35 [details]
additional source
Vanatta, E. G. (1927). Mollusks in shagnum moss. <em>The Nautilus.</em> 41(1): 34., available online at https://www.biodiversitylibrary.org/page/8519761 [details]
additional source
Rawls, H. C. & Yates, R. L. (1971). Fluorescence in endodontid snails. <em>The Nautilus.</em> 85(1): 17-20., available online at https://www.biodiversitylibrary.org/page/8516113 [details]