Measurements taken from Stigmatomma worker caste. A: fullface view; B: lateral view of head and mesosoma; C: dorsal view of mesosoma and anterior abdominal tergites. Abbreviations: HL, head length; HW, head width; HW2, head width 2; ML, mandibular length; PPW, propodeal posterior width; PtL, petiolar length; PtW, petiolar width; SL, scape length; WL, Weber's length of mesosoma. Illustrations by F. A. Esteves.