Fig. 2

Structure analysis of the studied populations. Summary of 76 of 100 runs of STRUCTURE with K = 5. Each individual is shown as a vertical bar, colored in accordance to its inferred clustering. Individuals of eight of the nine populations are clustered according to species and range, with the exception of two individuals marked in red triangles. These are mapped to both introduced S. invicta and S. richteri clusters, probably due to hybrid ancestry. Individuals of Herradura population are mapped to a fifth cluster, and to a cluster shared with the introduced S. invicta ants