Morphological differences between L. maltaeus (red) and L. emarginatus (yellow) specimens according to cephalic size (CS) and the linear discriminant D from Seifert (2020) (green dashed line: < 0 L. emarginatus, > 0 L. maltaeus). Circles represent the specimens measured in this study, while triangles indicate the specimens from Seifert (2020). Sequenced specimens present an inner circle, which is black if generated in this study or white if obtained from GenBank (i.e. from Schär et al. (2020)). Note that individual specimens may be misidentified by the discriminant scores, but not nest means of multiple workers according to the data provided by Seifert (2020).