Ankylopteryx, Brauer, 1864

Ma, Yunlong & Liu, Xingyue, 2021, Two new species of the green lacewing subgenus Ankylopteryx Brauer, 1864 (s. str.) (Neuroptera, Chrysopidae) from China, Zootaxa 4941 (3), pp. 425-433 : 432

Updated key to Chinese species of Ankylopteryx (s. str.) by Ma et al. (2020)

1. First intramedian cell very long and narrow................................................................. 2

- First intramedian cell short and wide...................................................................... 4

2. Frontal area between antennae with three black spots; scape and pedicel with brownish stripes.... A. gracilis Nakahara, 1955

- Frontal area between antennae immaculate; scape and pedicel immaculata........................................ 3

3. Both wings with yellowish marking patterns........................................ A. ferruginea Tsukaguchi, 1995

- Both wings with brownish marking patterns........................................... A. doleschalii Brauer, 1864

4. Frontal area between antennae with markings............................................................... 5

- Frontal area between antennae without markings............................................................ 6

5. Frontal area between antennae with three spots; hind margin of both wings without a large brown mark in the anal section.............................................................................. A. yangi Ma, Yang & Liu, 2020

- Frontal area between antennae with two spots; hind margin of both wings with a large, dark brown, irregular shaped mark along posterior margin near the base of the wing, including the anal wings........................ A. delicatula Banks, 1937

6. Hind margin of both wings with a large brown mark, not near base, extending over five marginal veins.............................................................................................. A. magnimaculata Yang, 1987

- Hind margin of both wings without brownish band........................................................... 7

7. Frons usually with large and broad reddish stripe below toruli; entoprocessus sinuous medially............................................................................................ A. octopunctata candida (Fabricus, 1798)

- Frons with narrow reddish stripe below toruli; entoprocessus not sinuous medially.................................. 8

8. Large species (forewing Ẑ 14 mm); wings with extremely distinct markings ( Fig. 2A ).............. A. rubrocincta sp. nov.

- Smaller species (forewing ± 13 mm); wings with indistinct markings ( Fig. 1A )...................... A. diffluens sp. nov.

Figures

FIGURE 1. Ankylopteryx (A.) diffluens sp. nov. (holotype, male). A. Habitus (scale bar = 5.0 mm); B. Head, frontal view (scale bar = 0.5 mm); C. Head and thorax, dorsal view (scale bar = 1.0 mm); D. Head and prothorax, lateral view (scale bar = 1.0 mm).

FIGURE 2. Ankylopteryx (A.) diffluens sp. nov. (A–D: holotype, male; E–I: paratype, female), abdomen. A. Segment A7- terminus, lateral view; B. Segment A7-terminus, ventral view; C. Gonarcal complex, lateral view; D. Gonarcal complex, dorsal view; E. Segment A7-terminus, lateral view; F. Callus cerci; G. Segment A7-terminus, ventral view; H. Spermatheca; I. Subgenitale. cc callus cerci; ent entoprocessus; g.l. gonaphophyses lateralis; gsac gonosaccus gon gonarcus; pp pseudopenis; S7 sternum 7; S8 sternum 8; sg subgenitale; sm spermatheca; t.s. transverse sclerite; T7 tergum 7; T8 tergum 8; T9+e tergum 9+ectoprocts.