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Geographic localities of the 12 Myrmica species collected from Great Britain, Spain, Finland, and Greece. See Online Resource 1 for locality details. rub = M. rubra; rug = M. ruginodis; sab = M. sabuleti; scab = M. scabrinodis; sch = M. schencki; alo = M. aloba; lob = M. lobicornis; lobu = M. lobulicornis; spec = M. specioides; sulc = M. sulcinodis; van = M. vandeli; wes = M. wesmaeli. Species in bold were used in a more detailed statistical analysis
