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Cytogenetic Arguments in Favour of a Taxonomic Revision of Lepilemur septentrionalis

Rumpler Y.a · Ravaoarimanana B.a,b · Hauwy M.a · Warter S.a
aEA 1315 Primates: Variabilité et Evolution des Prosimiens à l’Homme, Institut d’Embryologie, Faculté de Médecine, Strasbourg, France; bDépartement de Paléontologie et d’Anthropologie Biologique, Université d’Antananarivo, Madagascar Folia Primatol 2001;72:308–315 (DOI:10.1159/000052747)

Abstract

Cytogenetic investigations performed on 30 specimens of Lepilemur septentrionalis confirmed the existence of 4 karyotypes differing from each other by 1–2 chromosomal rearrangements. These data, pooled with those obtained in earlier studies, showed that out of 60 animals karyotyped only two kinds of hybrids were detected, allowing us to characterise two chromosomally polymorphic populations. No natural hybrids could be found between these two populations, which could thus be considered as two separate species. The possible role of the chromosomal rearrangements in the process of reproductive isolation between these two populations is discussed.

 

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