Metanigrus Tsaur, Yang & Wilson, 1986

Lv, Shasha, Yang, Lin & Chen, Xiangsheng, 2024, Two new species of the planthopper genus Metanigrus Tsaur, Yang & Wilson from China (Hemiptera: Fulgoromorpha: Meenoplidae), with an updated checklist and key to species, Zootaxa 5419 (2), pp. 289-295 : 290

Key to species of Metanigrus Tsaur, Yang & Wilson, 1986

1. Dorsolateral and middle parts of anal tube without fingerlike process............................................ 2

- Dorsolateral or middle parts of anal tube with fingerlike process................................................ 4

2. Basolateral side of anal tube with a short fingerlike process; outer process of gonostyli with a thumb-like process ( Tsaur et al. 1986: fig. 15E)......................................................... .. M. yami Tsaur, Yang & Wilson, 1986

- Basolateral side of anal tube with a long curved fingerlike process; outer process of gonostyli without thumb-like process....3

3. Frons with two brownish black patches on both sides; outer process of gonostyli bifurcated nearly equal at apex in lateral view (Lv et al. 2021: figs 10, 13, 16).................................................... M. chromus Lv & Chen, 2021

- Frons medially with a big, longitudinal, brown patch; outer process of gonostyli not bifurcated at apex in lateral view ( Liu & Qin 2020: figs 3D, 4D)........................................................ .. M. rotundatus Liu & Qin, 2021

4. Dorsolateral and middle parts of anal tube each with a fingerlike process......................................... 5

- Dorsolateral or middle parts of anal tube with a fingerlike process................................................6

5. Middle part of forewing ( Figs 14, 15, 18 ) with black markings, veins of terminal part brownish black. M. angularus sp. nov.

- Middle part of forewing without black markings, veins of terminal part yellowish white (Lv et al. 2021: figs 6, 33)...................................................................................... M. gremius Lv & Chen, 2021

6. Distal part of forewing without a large black patch; middle part of anal tube with a fingerlike process (Lv et al. 2021: figs 44, 46, 49)............................................................... M. spinatus Lv, Chen & Bourgoin, 2021

- Distal part of forewing with a large black patch; dorsolateral part of anal tube with a stout fingerlike process............. 7

7. Apex of aedeagus ( Figs 6, 13 ) expanded in lateral view; apex of gonostyli ( Figs 6, 10 ) tapering in lateral view............................................................................................... ... M. afflatus sp. nov.

- Apex of aedeagus unexpanded in lateral view; apex of gonostyli fan-shaped in lateral view (Lv et al. 2021: figs 24, 26, 27).............................................................................. M. guttatus Lv & Chen, 2021

Figures

FIGURES 14–26. Metanigrus angularus sp. nov., male 14. Habitus, dorsal view; 15. Habitus, lateral view; 16. Head and thorax, dorsal view; 17. Frons, ventral view; 18. Forewing; 19. Pygofer, lateral view; 20. Pygofer, ventral view; 21. Hindwing; 22. Anal tube, dorsal view; 23. Gonostyli, lateral view; 24. Gonostyli, dorsal view; 25. Aedeagus, ventral view; 26. Aedeagus, lateral view. Scale bars: 0.2 mm.

FIGURES 1–13. Metanigrus afflatus sp. nov., male 1. Habitus, dorsal view; 2. Habitus, lateral view; 3. Head and thorax, dorsal view; 4. Frons, ventral view; 5. Forewing; 6. Pygofer, lateral view; 7. Pygofer, ventral view; 8. Hindwing; 9. Anal tube, dorsal view; 10. Gonostyli, lateral view; 11. Gonostyli, dorsal view; 12.Aedeagus, ventral view; 13.Aedeagus, lateral view. Scale bars: 0.2 mm.