original description(ofUnio imbricatus Mörch, 1861)Mörch, O. A. L. (1860-1861). Beiträge zur Molluskenfauna Central-Amerika´s. <em>Malakozoologische Blätter.</em> 7: 170-213 [Stated dates: Dec. 1860 on pp. 161, 177; Jan. 1861 on p. 193, 209, 225]., available online athttps://www.biodiversitylibrary.org/page/15919729 page(s): 205 [details]
original description(ofUnio encarpus I. Lea, 1868)Lea I. (1868). Description of nine species of Unionidæ from Lake Nicaragua, Central America. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 20: 94-96 [after 31 March 1868, before 9 November 1868]., available online athttps://biodiversitylibrary.org/page/9768243 page(s): 95 [details]
basis of recordGraf, 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 Nicaragua [details] Type locality "San Juan de Nicaragua" [details]