Ortmann, A.E. 1909. The breeding season of Unionidae in Pennsylvania. Nautilus 22(9): 91-95. Available electronically.
Ortmann, 1909. Nautilus 22(9): 93.
(error for Cyprogenia Agassiz, 1852)
Type species: Unio irroratus Lea, 1828 = Cyprogenia stegaria
+ Alasmodonta edentula Say, 1829