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By: Kallman, Klaus D.Edition:Publication info: New York, NY American Museum of Natural History c2004Volume: no.3441 (2004)Series:Holding Institution: American Museum of Natural History LibrarySubjects: Classification Coatzacoalcos River Valley Fishes Geographical distribution Mexico Phylogeny Tehuantepec, Isthmus of Xiphophorus Xiphophorus mixei Xiphophorus monticolusBHL Collections: