Fig. 10

European mammalian palaeobiogeography during the Early Oligocene (MP21-22). a The mammalian localities are clustered based on significant similarities and dissimilarities of the Raup and Crick index, the tree is built using the neighbour-joining method (see Sect. 2). b The approximate position of the localities at the Early Oligocene is indicated on the palaeogeographic map by dots and numbers; the list of the localities and the reference numbers are given in the Table 1 (Electronic Supplementary Material 1). The European palaeogeographic map is re-drawn after Popov et al. (2004)