File:Valvata oregonensis.jpg

Summary
type specimen of Valvata oregonensis. Width: 8.0 mm, height: 5.0 mm. Date

1922(1922) Source

Hanna G. D. (August) 1922. Fossil Freshwater Mollusks from Oregon Contained in the Condon Myuseum of the University of Oregon. Volume I, number 12. page 11-12, plate 3. fig. 1-2. Author

G. Dallas Hanna (1887-1970)