ML tree depicting relationships within the Rattus division on the basis of mt dataset and estimated using partitioned ML analysis. Bp values are shown above branches. Bp values equal to 100% are not indicated. Robins' sequences are highlighted in blue when nominal and phylogenetic species are congruent, in red on the contrary (see also Table 3). Rattus hoffmanni sequences are indicated in grey; sequences provided by Verneau and Catzeflis in green. Rr for Rattus rattus species group, Re for Rattus exulans species group, Rn for Rattus norvegicus species group. At the right hand of the tree, cluster denomination is the same as in the Figure 3.