basis of recordInvertEBase. (2018). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase (InvertEBase.org) project. [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Etymology Named for the American conchologist, Edward Warren Roper (1858-1898). He collected the type series. [details] Type locality Redding, California, at the head of the Sacramento Valley [details]