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Comptes Rendus Palevol
Volume 7, n° 8
pages 645-656 (décembre 2008)
Doi : 10.1016/j.crpv.2008.09.014
Received : 20 August 2008 ;  accepted : 17 September 2008
Biogeographic relationships of African carnivoran faunas, 7–1.2Ma
Relations biogéographiques entre les faunes africaines de carnivores, 7–1,2Ma
 

Lars Werdelin
Department of Palaeozoology, Swedish Museum of Natural History, Box 50007, SE-10405 Stockholm, Sweden 

School of Human Evolution and Social Change, Arizona State University, PO Box 872402, Tempe, AZ 85287-2402, USA.
Abstract

This study analyses the carnivore component of African fossil faunas from three time slices: 7–5Ma, 4–3Ma, and 2.5–1.2Ma, using cluster analysis and principal coordinate analysis (PCO) of presence/absence data on genera. The faunas mostly cluster by time slice, with the exception of Laetoli (Tanzania) and Ahl al Oughlam (Morocco), which differ from all other faunas. The separation during the Late Miocene of a Chado–Libyan bioprovince from the remainder of Africa is supported. No such distinctions are present in the other time slices. Taxonomic distance is not generally correlated with geographic distance, though if Langebaanweg is removed from the 7–5Ma time slice, the correlation at that time is significant. Comparison of these paleontological results with phylogeographic studies of modern species leads to some general comments on the analytic power of the fossil record with regard to interregional migrations.

The full text of this article is available in PDF format.
Résumé

Cette étude analyse la composante carnivore des faunes fossiles africaines de trois périodes, 7–5Ma, 4–3Ma et 2,5–1,2Ma, en utilisant l’analyse cluster et l’analyse en coordonnées principales des données d’absence/présence des genres. Les faunes se regroupent essentiellement par période temporelle, à l’exception de Laetoli (Tanzanie) et Ahl al Oughlam (Maroc) qui diffèrent de toutes les autres faunes. La séparation, au cours du Miocène supérieur, d’une bioprovince Tchadolibyenne du reste de l’Afrique est corroborée. De telles distinctions n’apparaissent pas au cours des autres périodes. La distance taxonomique n’est généralement pas corrélée à la distance géographique bien que, si l’on retire Langebaanweg de la période 7–5Ma, cette corrélation soit alors significative. La comparaison de ces résultats paléontologiques avec les études phylogéographiques d’espèces modernes conduit à des commentaires généraux sur le pouvoir analytique de l’enregistrement fossile en ce qui concerne les migrations inter-régionales.

The full text of this article is available in PDF format.

Keywords : Carnivora, Africa, Miocene, Pliocene, Pleistocene, Phylogeography, Migration

Mots clés : Carnivora, Afrique, Miocène, Pliocène, Pléistocène, Phylogéographie, Migration




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