v. 1826 Rosalina globularis d'Orbigny, 1826, p. 271, pl. 13, figs. 1-4.

v. 1922 Discorbis floridana Cushman, 1922, p. 39, pl. 5, figs. 11, 12.

v. 1971 Rosalina floridana (Cushman). Schnitker, 1971, p. 210, pl. 5, fig. 19.

Rosalina floridana was counted with this species because of the morphological overlap between the two species showing a large variability in ventral side perforation, presence and size of last chamber overlap, and inflation of the test (Javaux 1999). This intergradation has been shown only in culture before (Chinn, unpublished MSc thesis, 1972) where Rosalina floridana variants, produced in clones without environmental change, could be classified in three different genera (Discorbis, Rosalina, Planorbulina) and possibly a fourth genus (Cibicides).

This species is characteristic of Bermuda mangrove assemblages where it displays the largest morphological variability, and it also occurs in Bermuda lagoons. It is reported in nearshore waters and lagoons of Florida-Bahamas, and the Belize Shelf (as Tretomphalus bulloides, which is the floating stage of R. floridana-globularis); in backreefs and reefs of Belize Shelf (as Rosalina spp.), and in mangroves of Puerto Rico and Sinai (as Rosalina sp.). Rosalina columbiensis (Cushman) is probably also a junior synonym of R. globularis.