original description
Henderson, J. & Rodeck, H. G. (1934). New species of Pliocene Mollusca from Eastern Oregon. <em>Journal of Paleontology.</em> 8(3): 264-269.
page(s): 265-266, pl. 37, figs 1a-b [details] Available for editors [request]
basis of record
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 66 [details] Available for editors [request]
additional source
Modell, H. (1957). Die fossilen Najaden Nordamerikas. Ein Klassifizierungsversuch. <em>Archiv für Molluskenkunde.</em> 86(4/6): 183-200.
page(s): 199 [details] Available for editors [request]
From editor or global species database
Type locality "16 miles southwest of Vale, Malheur County, Oregon", USA; Pliocene [details]