Epiosmylus Panfilov in Dolin et al., 1980

(Fig. 7B)

Type species. Epiosmylus longicornis Panfilov in Dolin et al., 1980: 100 (by original designation).

Diagnosis. Wings narrow, subacute apically; RP with 5–6 branches; RP1 originating far from origin of RP (1/3–1/ 2 wing length); FW medial fork close to but distal to origin of RP; MA with few branches near wing margin in both wings; FW MP pectinately branched with 3–6 branches; HW MP elongate, pectinately branched; FW CuA pectinately branched (3–5 branches); FW CuP pectinately branched (3–7 branches); HW CuA elongate with widely spaced pectinately branches; HW CuP simple; FW A1 pectinate (3 widely spaced branches).

Comments. The genus is the type of the family Epiosmylidae Panfilov in Dolin et al., 1980, which was synonymised with Gumillinae by Menon & Makarkin (2008). Epiosmylus is differentiated from most other gumilline genera by the first RP branch originating on RP at least 1/3 wing length and relatively few branches of RP (5–6). It appears closely related to Enodinympha and Tenuosmylus . The wings of these genera are relatively narrow compared to other genera (e.g., Gumilla).

Included species.

E. longicornis Panfilov in Dolin et al., 1980 (Kazakhstan) (Late Jurassic)

E. longus Khramov, 2017 (Russia) (Middle Jurassic)

E. panfilovi Ren & Yin, 2002 (China) (Middle Jurassic)