Frýda, J., Blodgett, R. B. & Stanley, G. D. Jr. (2003). New neritopsoidean gastropods (Neritimorpha) from the Late Triassic (Late Carnian - Early Norian) of the Wallowa Terrane, northeaster Oregon.
Mitteilungen aus dem Geologisch-Paläontologischen Institut der Universitat Hamburg. 87:55-72.