Isoscelipteron, Costa, 1863

Li, Di, Aspöck, Horst, Aspöck, Ulrike & Liu, Xingyue, 2018, A review of the beaded lacewings (Neuroptera: Berothidae) from China, Zootaxa 4500 (2), pp. 235-257 : 246

Key to males of Isoscelipteron from China

1 Tergum 9 + ectoprocts posteroventrally with short obtuse processus ( Fig. 29 )..................... I. pectinatum (Navás)

- Tergum 9 + ectoprocts without processus................................................................... 2

2 Tergum 9 + ectoprocts in lateral view slightly elongated and tapering posteroventrad ( Fig. 33 ; U. Aspöck & H. Aspöck 1980: Fig. 8 ).............................................................................................. 3

- Tergum 9 + ectoprocts in lateral view not elongated or tapering posteroventrad ( Fig. 27 ; Yang & Liu 1999: Fig. 20-19C ).... 4

3 Tergum 9 + ectoprocts with posterodorsal portion arcuately convex (U. Aspöck & H. Aspöck 1980: Fig. 8 ).................................................................................................. I. formosense (Krüger)

- Tergum 9 + ectoprocts with posterodorsal portion nearly right-angled ( Fig. 33 )................. I. acuticaudatum sp. nov.

4 Tergum 9 + ectoprocts posteriorly truncate ( Yang & Liu 1999: Fig. 20-19C ); gonocoxites 11 narrow medially ( Yang & Liu 1999)............................................................................. I. eucallum Yang & Liu

- Tergum 9 + ectoprocts posteriorly arcuately convex ( Fig. 27 ); gonocoxites 11 medially with a ring-shaped lobe ( Fig. 28 )................................................................................... I. dictyophilum Yang & Liu

Figures

FIGURE 8. Isoscelipteron dictyophilum Yang & Liu, male, habitus photo. Scale bar: 5.0 mm.

FIGURES 29–32. Isoscelipteron pectinatum (Navás). 29. Male genitalia, lateral view; 30. Male genitalia, ventral view; 31. Female genitalia, lateral view; 32. Female genitalia, ventral view. b: bursa copulatrix; e: ectoproct; hi: hypandrium internum; hm: hypomere; gx9: gonocoxite 9; gx10: complex of fused gonocoxites, gonapophyses and gonostyli 10 (= parameremediuncus complex); gx11: gonocoxite 11 (= gonarcus); r: spermatheca; t: torulus; S7–9: sternum 7–9; T7–9: tergum 7–9. Scale bar: 0.5 mm.

FIGURES 33–34. Isoscelipteron acuticaudatum sp. nov. 33. Male genitalia, lateral view; 34. Male genitalia, ventral view. e: ectoproct; hi: hypandrium internum; hm: hypomere; gx9: gonocoxite 9; gx10: complex of fused gonocoxites, gonapophyses and gonostyli 10 (= paramere-mediuncus complex); gx11: gonocoxite 11 (= gonarcus); t: torulus; S7–9: sternum 7–9; T7–9: tergum 7–9. Scale bar: 0.5 mm.

FIGURES 27–28. Isoscelipteron dictyophilum Yang & Liu. 27. Male genitalia, lateral view; 28. Male genitalia, ventral view. e: ectoproct; hi: hypandrium internum; hm: hypomere; gx9: gonocoxite 9; gx10: complex of fused gonocoxites, gonapophyses and gonostyli 10 (= paramere-mediuncus complex); gx11: gonocoxite 11 (= gonarcus); t: torulus; S7–9: sternum 7–9; T7–9: tergum 7–9. Scale bar: 0.5 mm.

FIGURES 19–23. Berotha chouioi Yang & Liu. 19. Male genitalia, lateral view; 20. Male genitalia, ventral view; 21. Female genitalia, lateral view; 22. Female genitalia, ventral view; 23. Female complex of bursa copulatrix and spermatheca, lateral view. b: bursa copulatrix; e: ectoproct; gp7: gonapophysis 7; gx7: gonocoxite 7; gp8: gonapophysis 8; gx8: gonocoxite 8; gx9: gonocoxite 9; gx10: complex of fused gonocoxites, gonapophyses and gonostyli 10 (= paramere-mediuncus complex); gx11: gonocoxite 11 (= gonarcus); hc: hypocauda; hi: hypandrium internum; r: spermatheca; S7–9: sternum 7–9; T7–9: tergum 7–9. Scale bars: 0.5 mm (Figs. 19–22); 0.2 mm (Fig. 23).