Arcofacies, Muir, 1915

Li, Hongxing, Yang, Lin & Chen, Xiangsheng, 2019, Two new species of the bamboo-feeding planthopper genus Arcofacies Muir (Hemiptera: Fulgoroidea: Delphacidae) from China, Zootaxa 4706 (2), pp. 384-390 : 387

Key to species (males) of Arcofacies from China (revised from Hou & Chen 2010)

1. Lateroapical angles of anal segment of male truncate, without spinous process ( Chen et al. 2007: Fig. 6 )... A. fullawayi Muir

– Lateroapical angles of anal segment produced into a stout spinous process respectively ( Figs 7 , 19 ).................... 2

2. Aedeagus simple, without elongate spinous process ( Chen et al. 2007: Fig. 16 ).................. A. maculatipennis Ding

– Aedeagus with long spinous process at middle or at base ( Figs 9, 10 , 22 )......................................... 3

3. Aedeagus with 2 long spinous processes at middle ( Ding 1990: Fig. 6 ).......................... A. strigatipennis Ding

– Aedeagus with long spinous process at base ( Figs 9, 10 , 22 )................................................... 4

4. Pygofer in posterior view without medioventral process ( Hou & Chen 2010: Fig. 11 ); apex of genital style forked ( Hou & Chen 2010: Fig. 15 )..................................................................... A. moliensis Hou & Chen

– Pygofer in posterior view with medioventral process ( Figs 7 , 19 ); apex of genital style not forked ( Figs 11 , 23 )........... 5

5. Pygofer in posterior view with small medioventral process, flake-shaped ( Chen et al. 2007: Fig. 28); aedeagus with apex round and blunt ( Chen et al. 2007: Fig. 31).................................................... A. ampelocalamus Chen

– Pygofer in posterior view with 4 spinous medioventral processes ( Figs 7 , 19 ); aedeagus with apex acute, directed ventrad ( Figs 9 , 22 )............................................................................................... 6

6. Anal segment with lateroapical processes symmetrical ( Fig. 7 ); middle ventral margin of aedeagus with small process ( Figs 9, 10 )................................................................................ A. longispinus sp. nov.

– Anal segment with lateroapical processes asymmetrical, left one distinctly longer than right one ( Figs 19, 21 ); middle ventral margin of aedeagus without process ( Fig. 22 )................................................... A. varius sp. nov

Figures

FIGURES 1–12. Arcofacies longispinus sp. nov. 1. Male habitus, dorsal view; 2. Same, lateral view; 3. Head and thorax, dorsal view; 4. Face; 5. Frons, lateral view; 6. Forewing; 7. Male genitalia, ventral view; 8. Same, lateral view; 9. Aedeagus, left lateral view; 10. Same, right lateral view; 11. Genital style, ventral view; 12. Same, left lateral view. Scale bars: 0.5 mm (1, 2, 6); 0.2 mm (3–5, 7–12).

FIGURES 13–24. Arcofacies varius sp. nov. 13. Male habitus, dorsal view; 14. Same, lateral view; 15. Head and thorax, dorsal view; 16. Face; 17. Frons, lateral view; 18. Forewing; 19. Male genitalia, ventral view; 20. Same, lateral view; 21.Anal segment, right lateral view; 22. Aedeagus, left lateral view; 23. Genital style, ventral view; 24. Same, left lateral view. Scale bars: 0.5 mm (13, 14, 18); 0.2 mm (15–17, 19–24).