Nerita filosa, common name the threaded nerite, is a species of sea snail, a marine gastropod mollusk in the family Neritidae.
Description (Original description) The shell is globosely turbinate, with an exserted, sharp-pointed spire. Its whorls slant at the upper part, then become convex, and are spirally threaded with minutely divided ridges. The outer lip is inwardly thickened, minutely crenulated, and features a sharp lateral denticle on each side. The columella is smooth and finely toothed. The shell's color is rusty fawn, with the ridges delicately blue-black.
Distribution This marine species occurs Vanuatu and New Caledonia.
References
Dautzenberg P. (1929). Contribution à l'étude de la faune de Madagascar: Mollusca marina testacea. Faune des colonies françaises. [Contribution to the study of the fauna of Madagascar: Mollusca marina testacea. Fauna of the French colonies.]. Société d'Editions Géographiques, Maritimes et Coloniales. 3(4): 321-636, pls 4-7. Paris.