Abstract
The present revision recognizes six species of Erichsonella. E. angulata (Dana, 1849) is synonymized with E. filiformis (Say, 1818); E. isabelensis Menzies, 1951 is elevated to specific rank; Ronalea Menzies and Bowman, 1956 is considered a valid genus. A key to species is furnished, data on morphological and meristic variability are provided for E. filiformis, E. floridana and E. attenuata. Cladistic analysis indicates that E. attenuata and E. floridana present the greatest number of primitive and derived characters, respectively. The phylogeny of the species is discussed as well as their geographical distribution.