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By: Engel, Michael S. - Gonzalez, Victor H. - Smith-Pardo, Allan H.Edition:Publication info:Volume:Series:Holding Institution: American Museum of Natural History LibrarySubjects: America Argentina Bees Calliopsini Chile Cordillera Occidental (Peru) Peru Phylogeny Spinoliella Xeranthrena Xeranthrena imponticulaBHL Collections: