Subgenus (Cidarina) W. H. Dall, 1909
(5-4-1-3-2-11-11-7-4-0-0-0-0) Ref. Abbott, 1974 p 39 [see also as Genus] cidaris (P. P. Carpenter, 1864) [T] (5-4-1-3-2-11-11-7-4-1-0-0-0) Adams' Spiny Margarite Ref. Abbott, 1974 p 39 d
(5-4-1-3-2-11-11-7-4-0-0-0-0) Ref. Abbott, 1974 p 39 [see also as Genus]
cidaris (P. P. Carpenter, 1864) [T] (5-4-1-3-2-11-11-7-4-1-0-0-0) Adams' Spiny Margarite Ref. Abbott, 1974 p 39 d