Genetic structure
The STRUCTURE analyses carried out with the 3RAD data set displayed the highest value of Ln P(D) at K = 7, though the Evanno method had its highest value at K = 3 (Figure 3). At K= 2, we recovered one cluster with members of E. ruidum sp. 1 and E. ruidum sp. 2 and another with those of E. ruidum spp. 3, 4 and 2x3. At K= 3 the specimens of E. ruidum sp. 1 from Guatemala and Trinidad and Tobago formed a relatively well-differentiated cluster. At subsequent K values, the specimens from Pinotepa and localities in Guerrero in Mexico, and the ones from Trinidad and Tobago were each recovered as exclusive clusters, whereas at K= 7 and 8 the specimens representingE. ruidum sp. 3 (except the one from Guerrero), E. ruidumsp. 4, E. ruidum sp. 2 from Quintana Roo, Mexico and Colombia, and the one from Guatemala each formed well-differentiated clusters.