The schematic tree is based on phylogenetic tree presented on Figure S1. Time estimates (in kya) shown for mtDNA subclades are based on the complete genome substitutions [42]. The circle size is proportional to the number of individuals sharing the haplotype. Geographical origin is indicated by different colours: green - central and eastern Europe (Czech Republic, Poland, Russia, Slovakia, Ukraine); yellow – southern Europe (Italy, Spain); red – western Europe (Austria, Germany, Netherlands); blue – northern Europe (Denmark, Finland, Ireland, United Kingdom, Orkney Islands); violet – Africa (Tunisia); black – Near East (Israel, Jordan); pink – southern Caucasus (Armenia, Georgia); grey – America (Philadelphia); white - unknown origin.