Tuberoxenos sphecidarum, female, cephalothorax, SEM micrographs A anterior part of cephalothorax, ventral side B anterior part of cephalothorax, dorsal side C mouthparts, ventral side D detail of anterior border of cephalothorax, ventral side E right mandible and maxilla, ventral side F left mandible and maxilla, ventral side. Abbreviations: dlf – dorsal field of labral area, fr – frontal region, fssf – furrow of supra-antennal sensillary field, mx – vestige of maxilla, mxp – vestige of maxillary palp, smxg – submaxillary groove, ssf – supra-antennal sensillary field.