Subgenus (Discors) G. P. Deshayes, 1858

(3-5-4-0-4-2-5-18-1-0-0-0-0)
Ref. Lindner, 1977 p 110
[see also as Genus]

lyratum (G. B. Sowerby, 1841)
(3-5-4-0-4-2-5-18-1-1-0-0-0)
Ref. Lindner, 1977 pl 60 c