original descriptionMarsh, W. A. (1891). Description of two new species of <i>Unio</i>, from Arkansas. <em>The Nautilus.</em> 5(1): 1-2., available online athttp://biodiversitylibrary.org/page/12565967 page(s): 2 [details]
basis of recordGraf, D. & Cummings, K. (2007). Review of the systematics and global diversity of freshwater mussel species (Bivalvia: Unionoida). <em>Journal of Molluscan Studies.</em> 73(4): 291-314.[details]
additional sourceInvertEBase. (2015). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase project (invertebase.org). [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Etymology Named for the American collector, Mr. Ellwood Pleas of Indiana. [details] Type locality Little Red River, Arkansas [details]