original description(ofUnio aztecorum var. chapalanus E. von Martens, 1890)Martens, E. von. (1890-1901). Biologia Centrali-Americana. Land and freshwater Mollusca. London: Francis & Taylor, xxviii + 706 pp., 44 pls. [1890: pp. 1-40, pl. 1; 1891: pp. 41-96, pls. 2-5; 1892: pp. 97-176, pls. 6-9; 1893: pp. 177-248, pls. 10-12; 1894: pls. 13-15; 1897: pp. 249-288, pl. 16; 1898: pp. 289-368, pls. 17-20; 1899: pp. 369-472, pls. 21-28; 1900: pp. 473-608, pls. 29-41; 1901: pp. 609-706 + xxviii, pls. 42-44]. <em>Biologia Centrali-Americana.</em> 9: 473-608, plates 28-44., available online athttps://biodiversitylibrary.org/page/573268 page(s): 504, pl. 35, fig. 5 [details]
basis of recordGraf, D.L. & Cummings, K.S. (2007). Review of the systematics and global diversity of freshwater mussel species (Bivalvia: Unionoida). Journal of Molluscan Studies, 73 (4): 291-314. London [November].[details]
additional sourceGraf, D.; Cummings, K. (2019). Musselp database: The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves). , available online athttp://mussel-project.uwsp.edu/[details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Distribution Southern Mexico [details] Type locality "Republica Mexicana" [details]