Euhexomyza Lonsdale

Euhexomyza Lonsdale, 2014: 497. Type species Melanagromyza simplicoides Hendel 1920, by original designation.

Euhexomyza was described by Lonsdale (2014) for a lineage of mostly north-temperate Salicaceae -feeding species where the larva forms an ovate gall in the cortex of a twig. These species were previously treated as part of Hexomyza Enderlein, but Lonsdale (2014) found the genus to be a polyphyletic dumping ground for a miscellany of gall-forming species, with the morphologically disparate type species belonging to Ophiomyia . He subsequently included the name Hexomyza as a junior synonym of Ophiomyia .

Species are brown and non-metallic (Fig. 44), they have a rounded clypeus and lack a prescutellar acrostichal. The fronto-orbital plate and parafacial are pronounced, forming a strong ring around the eye, the postsutural intra-alars are subequal (anterior seta never strong), and only the mid tibia sometimes has a lateromedial seta. The male genitalia (at least of the north temperate Salicaceae -feeders) are typified by a distiphallus that has the base broad and rounded and the apex tapered, and the phallophorus has a unique ventral “pouch” emerging from the distal margin (Fig. 250; Lonsdale 2014: fig. 62).