Geographic distribution of mitochondrial Aurelia lineages. Three main climate zones divide the lineages into cold/boreal, temperate/mediterran, and warm-tropical temperature ranges. Minimum sea temperatures averaged from all sampling locations per lineage are given in parentheses (*excluding the 4 LIM-MKL hybrid individuals from LIM lineage in Adriatic Mljet lakes due to their untypical life history traits, see discussion). The geographic origin of the tropical MCA lineage (?) is unknown.