Allotriosmylus Yang et al., 2010

(Fig. 7A)

Type species. Allotriosmylus uniramosus Yang et al., 2010: 856 (by original designation).

Diagnosis. Wings relatively narrow and small; wings with few longitudinal veins and crossveins, resulting in relatively large cells; end-twigging mostly absent; RP straight with one branch, originating at of wing length; FW M forked at 1/3 wing length; MA and MP pectinately branched, medial area enlarged; CuA, with relatively few pectinate branches; HW CuP short.

Comments. Known only from a single compression fossil specimen. Despite being very small and exhibiting the frequent reduction in wing cells associated with small wings found in other lacewings (e.g., Turnerochrysa Kimmins ( Chrysopidae)), the venation of this genus is typical of Gumillinae . The single branch of RP and the expanded medial area is unique to this genus.