Species in the genus were originally included in Leptocella Banks 1899. Prior to 1934, about 15 species were recognized in North America, while at the same 34 nominal Neotropical species had been described. In 1934, Milne reduced all of the North American species to 2: Leptocella pavida (Hagen) and Leptocella albida (Walker), the latter with numerous "color forms." Ross (1944) recognized these color forms as valid species, but pointed out the taxonomic problems associated with the genus. Ross (1944) stated, probably in reference to Milne's action, that, "No caddis fly genus has been subject to more conjecture regarding the differentiation and limits of its species…" He went on to say, "I wish to emphasize that there are many species which have not yet been investigated sufficiently to determine their status." and concluded, "I have been unable to find appreciable differences in the male genitalia. …until additional adult characters are found, it will be unwise to attempt definite placement…" The genus did not receive any additional attention until the 1970s. In 1974 Flint synonymized Leptocella Banks 1899 with Nectopsyche Müller 1879 (Brethesella Navás 1920 is also a synonym). In 1977 Haddock published a revision of the North American fauna where he recognized 12 Nearctic species. There has been no review of the genus since 1977 nor has their ever been a comprehensive treatment of the Neotropical fauna, where the greatest diversity of species occurs, although Flint and others have described numerous species and synonymized many others.