List of localities and individuals included in the present study.

The first column indicates the mountain chain: Northern Calcareous Alps (NCA), Southern Calcareous Alps (SCA), Western Alps (WA) and Western Carpathians (CAR). The SOIUSA codes each correspond to a mountain region following [23] (see Fig. 1 for full names). Country names are abbreviated according to the ISO 3166-1 code as defined by the International Organization for Standardization. The GPS coordinates are given according to the World Geodetic System 1984 (WGS84) alongside the altitude in meters above sea level (asl). The individual IDs (IndIDs) of the specimens, together with information on the respective mt clades, are provided for each locality. The attachment ‘var’ indicates that specimens provided variants slightly deviating from the three main alleles, and ‘HTX’ are strongly differing unique alleles. The last column indicates the subspecies reported by [17] for the respective Alpine areas (e: edita, r: raxae, p: pseudogularis, i: infima, d: dolium, g: gracilior) or represent type localities of Carpathian subspecies (b: brancsikii, c: cebratica, m: minima, t: titan). Asterisks indicate that the sampling site is the type locality of the respective subspecies. Abbreviations of country names and federal districts are provided at the end of the table.