Fig. 1 in Comparative analysis of worker head anatomy of Formica and Brachyponera (Hymenoptera: Formicidae)

Fig. 1. Photomicrographs of heads of Formica rufa (A – C) and Brachyponera luteipes (D – F). Note the slight difference in shape between a small (A,B) and a larger head (C). A,D: Dorsal view. B,E: Lateral view. C,F: Ventral view. — Abbreviations: ce – compound eye; cl – clypeus; dma – dorsal mandibular articulation; es – epistomal sulcus; fr – frontal area; frc – frontal carina; fl – frontal line; ga – galea; glo – glossa; hysc – hypostomal carina; hyst – elongated tip of hypostomal carina; lbr – labrum; md – mandible; oc – ocelli; oca – occipital carina; occ – occipital region; pgb – postgenal bridge; pgr – postgenal ridge (visible through the head capsule); plb – labial palp; pmx – maxillary palp; pm – prementum; pocc – postocciput; sca – supraclypeal area; st – stipes; to – torulus; tol – torular lobe; vma – ventral mandibular articulation; vt – area of the vertex. — Symbols: white arrowhead – ventral carina on the postgena; black arrowhead – groove on lateral clypeus.