This genus includes many species that are highly variable, so most authors group them as Triloculina spp. and report them from lagoons, reefs and associated environments. We will add remarks for the following species when their specific distribution has been reported by identifying them at species level.

v. 1839 Triloculina bicarinata dd'Orbigny, 1839a, p. 158, pl. 10, figs. 18-20.

This species lives in Bermuda lagoons, as well as in nearshore areas, lagoons and mangroves of Florida-Bahamas and in reef areas of the Belize Shelf.

v. 1839 Triloculina linneiana d'Orbigny, 1839a, p. 172, pl. 9, figs. 11-13.

This species has the same distribution as T. bicarinata.

v. 1803 Verniculum oblongum Montagu, 1803, p. 522, pl. 14, fig. 9.

This species is abundant in Bermuda mangroves. It is also reported in mangroves of Florida-Bahamas, nearshore waters and lagoons of Florida-Bahamas, Tobago and Barbuda, in brackish waters of Barbuda, and in reefs and backreefs of St. Lucia.