Subgenus (Isorobitella) A. M. Keen, 1962
(3-5-4-0-17-8-3-3-1-0-0-0-0) [see also as Genus] singularis A. M. Keen, 1962 (3-5-4-0-17-8-3-3-1-1-0-0-0) [=Isorobitella singularis (A. M. Keen, 1962)] Ref. Bernard, 1983 p 32
(3-5-4-0-17-8-3-3-1-0-0-0-0) [see also as Genus]
singularis A. M. Keen, 1962 (3-5-4-0-17-8-3-3-1-1-0-0-0) [=Isorobitella singularis (A. M. Keen, 1962)] Ref. Bernard, 1983 p 32