A phylogenetic analysis was performed on the genera and subgenera within the freshwater triclad family Dugesiidae, based on 19 terminal taxa and 17 morphological characters. The phylogenetic tree proposed has length of 27 steps and consistency index of 0.66. This phylogenetic hypothesis implies that the current genusDugesiais paraphyletic and that its subgeneraGirardia, SchmidieaandDugesia S.S.should be elevated to the rank of genus. The generaCura, SpathulaandNeppiaare presumed monophyletic by default because the database was unable to provide autapomorphies for any of these genera. The generaDugesia S.S.andNeppiashare sistergroup relationship. Several characters are discussed which were previously considered to be of phylogenetic importance but were not included in the present analysis. It is emphasized that sensory organs form potentially useful set of phylogenetic characters for the Dugesiidae.