Eoexechia, Camier & Nel, 2020

Camier, Marie & Nel, Andre, 2020, The oldest fungus gnat of the tribe Exechiini in the lowermost Eocene Oise amber (Diptera: Mycetophilidae), Zootaxa 4722 (1), pp. 91-98 : 92

Eoexechia gen. n.

( Figs 1–3 )

urn:lsid:zoobank.org:act:A785CF8A-E9CE-48FA-9CC3-E251D9941A35

Type species. Eoexechia gallica sp. n.

Diagnosis. Antenna very long, with flagellomeres as broad as long; three ocelli; frontal furrow very short, confined to back of head; frontal tubercle bilobate and broad; hind tibial apical brush produced across tibia; well-developed empodium; costal vein distinctly produced beyond tip of R5; Sc twice as long as h; R1 short; M2 long.

Etymology. Named after the Eocene period and the genus Exechia . Gender feminine.

Figures

FIGURE 1. Eoexechia gallica sp. n. holotype MNHN.F.A71245. A, habitus; B, wing. Scale bars = 0.5 mm.

FIGURE 2. Eoexechia gallica sp. n. holotype MNHN.F.A71245. A, thorax, anepst anepisternum, ltg laterotergite, preepst 2 preepisternum 2, sctl scutellum; B, coxae, arrow setae on hind coxa. Scale bars = 0.5 mm (A), 0.2 mm (B).

FIGURE 3. Eoexechia gallica sp. n. holotype MNHN.F.A71245. A, head from above, m.o median ocellus; B, genitalia, v.b. ventral branch of gonostylus, m.b. medial branch of gonostylus, i.b. internal branch of gonostylus. Scale bars = 0.5 mm (A), 0.2 (B).