Systematics and diversification of Praomys species (Rodentia: Muridae) endemic to the Cameroon Volcanic Line (West Central Africa).
|dc.contributor.author||Bilong Bilong, C.|
|dc.description||Our integrative approach combines two mitochondrial genes (16S and cyt b gene), two nuclear genes (exon 10 GHR and exon 1 IRBP) and craniometrical data to test the status and to infer phylogenetic relationships of the three <EM>Praomys </EM>Cameroon Volcanic Line endemics (<EM>P. hartwigi</EM>, <EM>P. morio</EM> and <EM>P. obscurus</EM>). The taxonomic rank of the principal genus group is assessed and the mode of diversification of species of the <EM>P. tullbergi</EM> complex in Afrotropical forests is discussed based on estimates of times to the most recent common ancestors and on tree topologies. This study documents for the first time the molecular and morphometrical distinctiveness of <EM>P. hartwigi</EM> and <EM>P. morio</EM> within the <EM>P. tullbergi</EM> species complex. Further studies including specimens of <EM>P. hartwigi</EM> from all its distribution range are needed to conclude on the status of <EM>P. obscurus</EM>. The monophyly of the genus <EM>Praomys</EM> is refuted. Times to the most recent common ancestors of major clades within the <EM>P. tullbergi</EM> species complex are estimated for the last 2.5 Mya and during the last 1 or 2 Mya for different species or forms. The lowland forest refuge hypothesis might well explain the diversification of <EM>P. misonnei</EM>, <EM>P. rostratus</EM> and <EM>P. tullbergi</EM> in the guineo-congolese forest block. The isolation of montane forests could have facilitated the divergence between the two montane forest forms <EM>P. hartwigi</EM> and <EM>P. obscurus</EM> and between populations of <EM>P. morio</EM> from the continent and those from the island of Bioko. <EM>Praomys</EM> populations (species) that inhabit the Cameroon Volcanic Line <EM>Praomys</EM> probably originated as lowland forms subsequently specialized to highland conditions.|
|dc.title||Systematics and diversification of <EM>Praomys</EM> species (Rodentia: Muridae) endemic to the Cameroon Volcanic Line (West Central Africa).|
|dc.subject.free||Biological collection and data management|
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