Traits taxon details
original description
(of ) Newcomb, W. (1866). Description of a new American species of <em>Helix</em>. <em>American Journal of Conchology.</em> 2(1): 1-2, pl. 1., available online at https://www.biodiversitylibrary.org/page/6660589#page/19/mode/1up page(s): 1, pl. 1, figs. 1-3 [details]
basis of record
Pilsbry, H. A. (1939). Land Mollusca of North America (north of Mexico). Volume I Part 1. <em>The Academy of Natural Sciences of Philadelphia Monographs.</em> 3: i-xvii, 1-573, i-ix. Philadelphia [6 December]. page(s): 457 [details] Available for editors 
|