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The relationships among the major lineages of frogs are summarized and an unranked, phylogenetic taxonomy of Anura is proposed. The names of taxa are defined according to phylogenetic principles. Several currently recognized taxa, such as "Archaeobatrachia", "Discoglossoidea", "Leiopelmatidae", and "Discoglossidae" are paraphyletic, and the names are abandoned or redefined such that the associated taxa are monophyletic. Node-based names are proposed for several unnamed but previously recognized taxa: Leiopelmatanura, Bombinanura, Discoglossanura, and Pipanura. Pipanura is the node-based name for Mesobatrachia and Neobatrachia. Mesobatrachia comprises Pelobatoidea and Pipoidea. Pelodytidae is defined as a stem-based name to accommodate certain fossil pelobatoid taxa. Rhinophrynus, Rhinophrynidae, and Pipimorpha are defined as stem-based names that accommodate …