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Type: Artigo de periódico
Title: Geographic Variation In Cranial Morphology In Thrichomys Apereoides (rodentia: Echimyidae). Ii. Geographic Units, Morphological Discontinuities, And Sampling Gaps
Author: Dos Reis S.F.
Duarte L.C.
Monteiro L.R.
Von Zuben F.J.
Abstract: Geographic variation in cranial shape was examined in 20 samples of the echimyid rodent Thrichomys apereoides from northeastern, central, and southeastern Brazil. Canonical variate analysis and a dendrogram based on geometric shape descriptors revealed 2 groups of populations diagnosable by features of cranial shape and geographic continuity. The observed morphological discontinuity between the 2 groups of populations corresponds with a gap in sampling of T. apereoides, as represented by the museum series used. A positive, significant relationship between morphological and geographic distances was found among populations within each of the 2 groups but not between populations in the 2 groups. The indirect, statistical approach suggests that discontinuity in cranial shape in T. apereoides results from historical processes of differentiation rather than from an artifact caused by a gap in the available samples.
Rights: fechado
Identifier DOI: 10.1644/1545-1542(2002)083<0345:GVICMI>2.0.CO;2
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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