original description
(of Helix perspectiva 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 Helix patula Deshayes, 1832) Deshayes, G. P. (1830-1832). <i>Encyclopédie méthodique ou par ordre de matières. Histoire naturelle des Vers et Mollusques</i>. Vol. 2: viii+1-594 [part 1: i-vi, 1-256, Livraison 101, 1 Feb 1830; part 2: 1-144, Livraison 101, 1 Feb. 1830; 145-594, Livraison 102, 29 Sept. 1832]. Vol. 3: 595-1152 [Livraison 102, 29 Sept. 1832]. , available online at https://doi.org/10.5962/bhl.title.8638
page(s): Vol. 2, part 2, p. 217-218 [details]
original description
(of Gonyodiscus bryantwalkeri Pilsbry, 1924) Pilsbry, H. A. (1924). Some Alleghenian forms of the land-snail genus <i>Gonyodiscus</i>. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 76: 417-421.
page(s): 420, figs. 2d, 3d [details]
original description
(of Discus patulus carinatus MacMillan, 1940) MacMillan, G. K. (1940). <i>Discus patulus angulatus</i> Kutchka. <em>The Nautilus.</em> 53(4): 143., available online at https://www.biodiversitylibrary.org/page/8516441
page(s): 143 [details]
original description
(of Discus patulus edentulus Hubricht, 1963) Hubricht, L. (1963). Notes on the genus <i>Discus</i>. <em>The Nautilus.</em> 77(2): 62-63., available online at https://www.biodiversitylibrary.org/page/8520363
page(s): 63 [details]
original description
(of Discus patulus var. angulatus Kutchka, 1938) Kutchka, G. M. (1938). New varieties of <i>Anguispira</i> and <i>Discus</i>. <em>The Nautilus.</em> 52(1): 11-14, pl. 2., available online at https://www.biodiversitylibrary.org/page/8284509
page(s): 13, pl. 2 [details]
original description
(of Discus patulus var. brooksi Kutchka, 1938) Kutchka, G. M. (1938). New varieties of <i>Anguispira</i> and <i>Discus</i>. <em>The Nautilus.</em> 52(1): 11-14, pl. 2., available online at https://www.biodiversitylibrary.org/page/8284509
page(s): 13, pl. 2 [details]
original description
(of Discus patulus f. edentulus Pilsbry, 1948) Pilsbry, H. A. (1948). Land Mollusca of North America (north of Mexico). Volume II Part 2. <em>The Academy of Natural Sciences of Philadelphia Monographs.</em> 3: i-xlvii, 521-1113. Philadelphia [19 March].
page(s): 610, fig. 330c [details] Available for editors [request]
basis of record
Pilsbry, H. A. (1948). Land Mollusca of North America (north of Mexico). Volume II Part 2. <em>The Academy of Natural Sciences of Philadelphia Monographs.</em> 3: i-xlvii, 521-1113. Philadelphia [19 March].
page(s): 608-610, figs 330a-b [details] Available for editors [request]
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]
From editor or global species database