Allotriosmylus Yang et al., 2010

Winterton, Shaun L., Martins, Caleb Califre, Makarkin, Vladimir, Ardila-Camacho, Adrian & Wang, Yongjie, 2019, Lance lacewings of the world (Neuroptera: Archeosmylidae, Osmylidae, Saucrosmylidae): review of living and fossil genera, Zootaxa 4581 (1), pp. 1-99 : 18

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.

Figures

FIGURE 7. Gumillinae fossils. A. Allotriosmylus uniramosus Yang et al. (from Yang et al., 2010); B. Epiosmylus panfilovi Ren & Yin (from Ren & Yin, 2002); C. Enodinympha translucida Ren & Engel (forewing); D. Nuddsia longiantennata Menon & Makarkin (from Menon & Makarkin, 2008); E. Nilionympha pulchella Ren & Engel (from Ren & Engel, 2007); F. Tenuosmylus brevineurus Wang et al. (from Wang et al., 2009b) (figures not to scale).