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BORIS KRYTUFEK ELENA V. BUAN VLADIMÍR VOHRALÍK ROGHAIEH ZAREIE BEYTULLAH ÖZKAN 《Biological journal of the Linnean Society. Linnean Society of London》2009,98(1):121-128
We established a cytochrome b (cyt b ) phylogeny for six species of social voles. A Bayesian approach to phylogenetic reconstruction (BI) and a maximum likelihood (ML) tree revealed a dichotomy into two major clusters, namely a Microtus guentheri cluster and a M. socialis cluster. The three main lineages that emerged within each of these two clusters were separated by the K2P divergences which are above the intraspecific variation in Microtus . All six species were also retrieved in the minimum spanning network. Within its present taxonomic scope, M. guentheri is paraphyletic and consists of two allopatric sibling species: M. guentheri (Syria, Israel) and M. hartingi (Anatolia and the Balkans). The closest relative to these two species is M. dogramacii , which is possibly a sister species to M. hartingi . The two geographic samples were identified as M. irani , one from Shiraz (Iran) and the other from Balkusan (Turkey). The cyt b sequence confirmed the specific status of M. anatolicus within the M. socialis cluster. Although five species of social voles occur within a radius of < 500 km in the north-eastern corner of the Mediterranean, small-scale sympatry is exceptional. Species richness in this region possibly originates from past fragmentation with subsequent allopatric speciation in refugial areas. © 2009 The Linnean Society of London, Biological Journal of the Linnean Society , 2009, 98 , 121–128. 相似文献
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