01287nas a2200217   4500008004100000022001400041245008800055210006900143260002900212300001400241490000700255520064500262653001500907653001500922653001500937653001400952653000800966100001900974700001900993856005701012       1999                        eng d  a1096-003100aPhylogeny of the Prolecithophora (Platyhelminthes) Inferred from 18S rDNA Sequences0 aPhylogeny of the Prolecithophora Platyhelminthes Inferred from 1  bBlackwell Publishing Ltd  a103–1120 v153 aComplete nuclear 18S rDNA sequences from 14 species of the Prolecithophora were obtained and used, in combination with literature data, to generate the first parsimony-based hypothesis of the phylogeny of the order Prolecithophora (Platyhelminthes). Bootstrap, parsimony jack-knife, and Bremer support values were computed and compared. The monophyly of the Prolecithophora sensu stricto and the family Plagiostomidae is strongly supported. The taxa Separata, Combinata, and Plagiostomum are shown to be nonmonophyletic. Cylindrostomidae and Ulianinidae are transferred to Pseudostomidae. The Urastomidae is not part of the Prolecithophora.10aBoot-strap10aJack-knife10aNeodermata10aparsimony10aSSU1 aNoren, Michael1 aJondelius, Ulf  uhttp://dx.doi.org/10.1111/j.1096-0031.1999.tb00252.x01982nas a2200157   4500008004100000022001400041245009200055210006900147260002600216300001400242490000700256520146800263100001901731700001901750856005501769       2002                        eng d  a1463-640900aThe phylogenetic position of the Prolecithophora (Rhabditophora, ‘Platyhelminthes’)0 aphylogenetic position of the Prolecithophora Rhabditophora Platy  bBlackwell Science Ltd  a403–4140 v313 aComplete 18S ribosomal DNA (rDNA) sequences and partial 28S rDNA sequences from a selection of rhabditophoran taxa were obtained and used in combination with literature data to determine the phylogenetic position of the Prolecithophora and of two families sometimes included in the Prolecithophora, the Urastomidae and the Genostomatidae. The results are largely compatible with earlier molecular studies when supported clades are considered, and adjusting for the denser taxonomic sampling of this study. The position of the Proseriata is not compatible with the taxon Seriata, which is rejected. The Rhabdocoela excluding the Fecampiida and the Neodermata is monophyletic. The phylogenetic position of the Neodermata cannot be determined, but its placement is not compatible with the proposed taxa Revertospermata and Mediofusata Kornakova & Joffe, 1999, which are rejected. The Urastomidae and the Genostomatidae in all analyses group with the Fecampiida, and it is our recommendation that these taxa be included in the Fecampiida. The amended Fecampiida always group separately from the Prolecithophora sensu stricto, the Rhabdocoela, and the Neodermata. Our analyses reveal the existence of a strongly supported clade consisting of Prolecithophora + Tricladida + the amended Fecampiida, and we propose the name Adiaphanida for this clade. Tentatively the sister group of the Prolecithophora is a clade consisting of the Tricladida + amended Fecampiida.1 aNoren, Michael1 aJondelius, Ulf  uhttp://dx.doi.org/10.1046/j.1463-6409.2002.00082.x