Subgenus (Incisura) C. Hedley, 1904

(5-4-1-2-2-4-0-6-2-0-0-0-0)
Ref. Abbott, 1974 p 17
[see also as Genus]

lacuniformis Watson, 1886
(5-4-1-2-2-4-0-6-2-1-0-0-0)
Ref. Abbott, 1974 p 17

tabulata Watson, 1886
(5-4-1-2-2-4-0-6-2-2-0-0-0)
Ref. Abbott, 1974 p 17