Genus Dione J. E. Gray, 1847 [not Hubner, 1817]

(3-4-4-0-26-7-11-35-0-0-0-0-0)
[=(Hysteroconcha) P. Fischer, 1887]
Ref. Abbott, 1974 p 531
[=(Hysteroconcha) W. H. Dall, 1902]
Ref. Keen, 1971 p 172
[=Hysteroconcha "Fischer" W. H. Dall, 1902]
Ref. Vokes, 1980 p 171
[see as it applies to Subgenus (Hysteroconcha) under Genus Pitar]

exspinata L. A. Reeve, 1863
(3-4-4-0-26-7-11-35-0-1-0-0-0)
[=Pitar (Hysteroconcha) lupanaria (R. P. Lesson, 1830)]
Ref. Bernard, 1983 p 55
Keen, 1971 p 172

prora authors [not T. A. Conrad, 1837]
(3-4-4-0-26-7-11-35-0-1-0-0-0)
[=Pitar (Hyphantosoma) pollicaris (P. P. Carpenter, 1864)]
Ref. Bernard, 1983 p 54