Cacopsylla

Luo, Xinyu, Li, Fasheng, Ma, Yanfang & Cai, Wanzhi, 2012, A revision of Chinese pear psyllids (Hemiptera: Psylloidea) associated with Pyrus ussuriensis, Zootaxa 3489, pp. 58-80 : 60

Key to the known Cacopsylla nymphs on Pyrus ussuriensis in China

1. Fore wing pad with only 1 capitate seta at outer margin; ventral surface of hindwing pad nearly completely covered with micro spinules; 3+3 lateral free sclerites bearing a spiracle each present in ventral surface of abdomen ( Fig. 17 ); 3 pairs of sectasetae present in abdominal margin ( Fig. 17 )...................................... C. (Thamnopsylla) burckhardti sp. nov.

-. Fore wing pad with a line of 9–12 capitate setae along outer margin ( Figs 30 , 41 ); ventral surface of hindwing pad covered with micro spinules only in anterior half; 2+2 lateral free sclerites bearing a spiracle each present in ventral surface of abdomen; abdominal margin without sectasetae ( Figs 30 , 41 )....................................................... 2

2. Setae in wing pad margin and abdominal margin relatively longer ( Fig. 30 ); tarsal arolium relatively wider ( Fig. 32 ); outer circum-anal ring depressed laterally ( Fig. 31 )............................................ C. (Hepatopsylla) chinensis

-. Setae in wing pad margin and abdominal margin relatively shorter ( Fig. 41 ); tarsal arolium relatively narrower ( Fig. 43 ); outer circum-anal ring not depressed laterally ( Fig. 42 )........................... C. (Hepatopsylla) cinereosignata sp. nov.

Figures

FIGURES 17 – 19. Cacopsylla (Thamnopsylla) burckhardti sp. nov., nymph. 17. Overall view, left half shows dorsal aspect, right half shows ventral aspect; 18. ventral surface of caudal plate; 19. tarsal arolium and claws. Scale: for 17, 0.5 mm; for 18, 0.2 mm; for 19, 0.05 mm.

FIGURES 30 – 32. Cacopsylla (Hepatopsylla) chinensis (Yang & Li, 1981), nymph. 30. Overall view, left half shows dorsal aspect, right half shows ventral aspect; 31. ventral surface of caudal plate; 32. tarsal arolium and claws. Scale: for 17, 0.6 mm; for 18, 0.2 mm; for 19, 0.05 mm.

FIGURES 41 – 43. Cacopsylla (Hepatopsylla) cinereosignata sp. nov., nymph. 41. Overall view, left half shows dorsal aspect, right half shows ventral aspect; 42. ventral surface of caudal plate; 43. tarsal arolium and claws. Scale: for 17, 0.6 mm; for 18, 0.2 mm; for 19, 0.075 mm.