Geographic Variation in the South American Cricetine Rodent Bolomys lasiurus

摘要: Variation in cranial morphology of Bolomys lasiurus was examined using univariate and multivariate statistical procedures to evaluate approximately 1,000 specimens grouped into seven samples. Sexual dimorphism found for 20 the 24 characters analyzed, extent is similar throughout range species. Principal components cluster analyses indicated presence two distinct groups: (1) northernmost Amazonian (2) significantly smaller from other parts species' range.