Genus Throna P. P. Carpenter, 1859

(3-2-4-0-4-3-0-43-0-0-0-0-0)
[=Thracia G. B. Sowerby, 1823]
Ref. Abbott, 1974 p 558
[?=Thracia W. E. Leach, 1824]
Ref. Vokes, 1980 p 211