Fig. 4 in Comparative analysis of worker head anatomy of Formica and Brachyponera (Hymenoptera: Formicidae)

Fig. 4. SEM micrographs of the mandibles of Formica rufa (A,B) and Brachyponera luteipes (C – F). A,C: Dorsal view. B,D: Ventral view. E,F: Dorsolateral view. — Abbreviations: al – atala; at – apical tooth; bm – basal margin; dma – dorsal mandibular articulation; ma – mandalus; mdp – mandibular pit; mdc – mandibular carinae; mgo – mandibular gland opening; mmg – mesal mandibular groove. — Symbols: white arrowhead – groove distad mandalus; * – groove mesodorsad ventral mandibular articulation; black arrows – minute tubercles; white arrows – minute pores; white outlines – area of mandalus.