Stenosmylus stenopterus, MacLachlan, 1867

Cousin, Guillaume & Béthoux, Olivier, 2016, The steps towards an inconspicuous vein fusion documented in Stenosmylinae forewings (Neuroptera: Osmylidae), Organisms Diversity & Evolution (New York, N. Y.) 16 (1), pp. 225-232 : 228

Stenosmylus stenopterus

Both wing pairs subequal; fore- and hind wing 19.1 and 16.9 cm long, respectively; oval, with a slightly pointed apex;

Fig. 2 Wing venation in Stenolysmus extraneus ( Walker, 1853) . a, b, d – g Forewings. c Hind wing. a–c Wing overviews. d–g Details of the base of MP2 with respect to CuA (asterisk indicates the base of MP2; dashes delimit the CuA area). a, f Specimen QM IWC OB 8, left forewing. b, d, e Specimen QM IWC OB 7, right forewing. g Specimen QM IWC OB 6, left forewing

RP with distal branches further branched (about 11 main branches, 20 terminal branches). Forewing ( Fig. 4a, c ): MA fused with R short before the arising of RP+MA or opposite to it; RP and MA diverging almost immediately after the fusion; no clear origin of MP2 as herein identified (see B Discussion^); MP2 and CuA posteriorly pectinate; MA forked very distally (2 or 3 branches), MP1 with 7 branches, MP2 with 3–4 branches, CuA with 2–3 branches, CuP with 18 branches (posteriorly pectinate). Hind wing ( Fig. 4d ): no clear origin of MP2 as herein identified (see B Discussion^).

Figures

Fig. 4 Wing venation in Stenosmylus stenopterus MacLachlan, 1867 (AM K.84656). a, c Left forewing. b Left hind wing. a, b Wing overviews. c Details of the area between MP1 and CuP, without origin of MP2 distinct from cross-veins