MolluscaBase taxon details
original description
(of Helix lurida A. Gould, 1846) Gould, A. A. (1846). Descriptions of new shells, collected by the United States Exploring Expedition. <em>Proceedings of the Boston Society of Natural History.</em> 2: 141-145, 148-152 [July]; 153-156, 159-162, 165-167 [August]; 170-173, 175-176 [September]; 177-179, 180-184, 185-187, 190-192 [November]., available online at https://www.biodiversitylibrary.org/page/9490825
page(s): 179. [details]
original description
(of Helix pfeifferi R. A. Philippi, 1845) Philippi, [R.] A. (1845). Diagnosen einiger neuen Conchylien. <em>Archiv für Naturgeschichte.</em> 11: 50-71., available online at https://www.biodiversitylibrary.org/page/14776400
page(s): 62 [details]