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By: Erwin, Terry Lee - Pimienta, María Cleopatra - Murillo, Oscar E - Aschero, ValeriaType: ArticleIn: Proceedings of the California Academy of Sciences, 4th seriesVolume: 56, Supplement ISeries:Issue: 7Date: 2005-06-03Page Range: 72--85Publication Info: San Francisco California Academy of SciencesSubjects: