MolluscaBase taxon details
original description
(of Opeas octogyrum var. amazonicum Pilsbry, 1906) Pilsbry, H. A. (1906-1907). <i>Manual of conchology, structural and systematic, with illustrations of the species</i>. Ser. 2, Pulmonata. Vol. 18: Achatinidae: Stenogyrinae and Coeliaxinae. pp i-xiii, 1-357, pls 1-51. Philadelphia, published by the Conchological Department, Academy of Natural Sciences. [pp. 1-64, pls. 1-10, Jan. 20, 1906; pp. 65-160, pls. 11-20, Apr. 10, 1906; pp. 161-272, pls. 21-34, Oct. 2, 1906; pp. 273-357, i-xii, pls. 35-51, Jan. 25, 1907]. , available online at https://www.biodiversitylibrary.org/page/1099785 page(s): 208, pl. 29, fig. 78 [details]
basis of record
Simone, L. R. L. (2006). <i>Land and Freshwater Molluscs of Brazil</i>. Editora Grafíca Bernardi, FAPESP. São Paulo, 390 pp. page(s): 188 [details]
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