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Branchiosaurus (from Greek 'Branchios', meaning gills and 'Sauros', meaning lizard) is a genus of small, lightly built early prehistoric amphibians. Fossils have been discovered in strata dating from the late Pennsylvanian Epoch to the Permian Period. The taxa may be invalid; the material referred to the genus may be juvenile specimens of larger amphibians. Distribution is uncertain, though available fossils come from central Europe, most famous of which are the Permian around Pfalz, Germany.