FIGURE 6. Larval head structure. a in A revision of Bittacomorphinae with a review of the monophyly of extant subfamilies of Ptychopteridae (Diptera)

FIGURE 6. Larval head structure. a. Bittacomorpha clavipes head capsule, dorsal view; b. postmentum/postgena, ventral view; c. Bi. occidentalis head capsule, dorsal view; d. postmentum/postgena, ventral view e. Bittacomorphella fenderiana head capsule, dorsal view; f. postmentum/postgena, ventral view. Scale bars 0.5mm (a, c, e) and 0.25mm (b, d, f). Abbreviations: cly clypeus; frcly ap frontoclypeal apotome; gen—gena; poc—postocciput.