PlanariansPlatyhelminthsTurbellariaCestodaDNA, HelminthCestode InfectionsGenome, HelminthTrematodaRNA, HelminthInvertebratesPhylogenyHelminthsRegenerationRNA, Ribosomal, 18SFasciolaClassificationMolecular Sequence DataHelminth ProteinsEvolution, MolecularDNA, RibosomalSequence AlignmentRNA InterferenceFermentationGenes, HelminthAmino Acid SequenceBase SequenceIn Situ HybridizationHeadStem CellsStreptomycesBody PatterningSmad Proteins, Inhibitory