Multiple refugia and barriers explain the phylogeography of the Valais shrew, Sorex antinorii (Mammalia: Soricomorpha)

摘要: The aim of the present study was to investigate genetic structure Valais shrew (Sorex antinorii) by a combined phylogeographical and landscape approach, thereby infer locations glacial refugia establish influence geographical barriers. We sequenced part mitochondrial cytochrome b (cyt b) gene 179 individuals S. antinorii sampled across entire species' range. Six specimens attributed arunchi were included in analysis. pattern assessed Bayesian molecular phylogenetic reconstruction, population analyses, species distribution modelling (SDM)-based hindcasting approach. also used genetics (including isolation-by-resistance) determinants current intra-specific structure. analysis revealed shallow divergence among haplotypes no clear substructure within antinorii. starlike median-joining network is consistent with expansion from single refugium, probably located Apennines. Long branches observed on same suggest that another refugium may have existed north-eastern Italy. This result SDM, which suggests several habitable areas for Italian peninsula during LGM. Therefore appears occupied disconnected peninsula, supporting previous data other showing multiple southern refugial areas. By coupling analyses we able how past climatic suitability contributed populations. differentiation shown does not support specific status arunchi.