Chinaocerus Zhang & Li, 2016

Li, Min, Wang, Jiajia, Wang, Xianyi & Dai, Renhuai, 2022, Description of a new species of the leafhopper genus Chinaocerus (Hemiptera: Cicadellidae) from Yunnan, China, Zootaxa 5190 (3), pp. 431-437 : 432-433

Chinaocerus Zhang & Li, 2016

Type species. Chinaocerus bispinatus Zhang & Li, 2016 .

Description. Coloration. Body light brown to yellowish brown. Vertex yellowish brown with pair of black spots near dorsal margin of face. Pronotum with pair of triangular black marks on anterior margin. Mesonotum with basal black to dark brown trangular marks, a round spot on either side of median line. Forewing grey brown, veins dark brown.

Medium-sized. Head obviously wider than pronotum, anterior margin of crown convexly round, anterior and posterior margins nearly parallel in dorsal view. Ocelli small, situated near ends of lateral frontal sutures, and closer to eyes than to each other. Face slightly wider across eyes than long, gena with almost straight lateral margins; frontoclypeus broad; anteclypeus broadened apically, longer than wide, slightly surpassing apex of genae, and lateral margins slightly concave; lorum slightly narrower to slightly wider than anteclypeus. Pronotum relatively short and broad, anterior margin convexly rounded, posterior margin slightly concave. Exposed part of mesonotum and scutellum nearly triangular, slightly longer than pronotum. Forewing narrow and long, with 4 apical cells and 3 subapical cells, appendix medially broad, veins obviously. Hind femur with 2+0 macrosetae, hind tibial macrosetae PD 14–17, AD 5–6, AV 7–8, hind basitarsus with three platellae on distal transverse row.

Male genitalia. Male pygofer elongate, processes absent, ventral margin with denticles, anal tube processes narrow and elongate. Subgenital plate narrow and elongate, approximately as long as pygofer, with dense fine setae on dorsal and ventral margin. Style well-developed and curved dorsally, with slender setae on lateral surface apically. Connective five-lobed with medial longitudinal keel. Aedeagus with prominent basal apodeme expanded laterad, aedeagal shaft elongate, nearly straight in lateral view, with one or more pairs of lateral subapical processes and usually with dorsolateral lamella; gonopore near apex of shaft on posterior surface.

Female genitalia. Ovipositor slender and strongly projecting beyond pygofer, posterior margin of seventh sternite convexly rounded, second valvula with numerous small teeth along dorsal margin.

Distribution. China (Sichuan, Yunnan, Qinghai, Gansu).

Remark. Chinacerus is similar to Idiocerus Lewis in size, coloration, wing venation and male genitalia, but Chinaocerus differs in having the male pygofer ventral margin with denticles, aedeagal shaft with pair of lateral processes at subapex and usually with dorsolateral lamellae, and the female second valvulae elongate and slender.

Checklist of Chinacerus species from China

Chinacerus bispinatus Zhang & Li

Chinacerus bispinatus Zhang & Li, 2016: 237 , figs 1–2, 5–6, 11–20.

Distribution: China (Yunnan).

Chinacerus dentaedeagus sp. nov.

Distribution: China (Yunnan).

Chinacerus dentatus Zhang

Chinacerus dentatus Zhang & Li, 2022: 447 , figs 1–4, 5–6, 7, 8–17.

Distribution: China (Qinghai, Gansu).

Chinacerus kangdingensis Zhang & Li

Chinacerus kangdingensis Zhang & Li, 2016: 240 , figs 3–4, 7–8, 21–31.

Distribution: China (Sichuan).

Chinacerus sexspinosus Zhang & Webb

Chinacerus sexspinosus Zhang & Webb, 2018: 585 , figs 3–4, 7–8, 19–28.

Distribution: China (Yunnan).

Chinacerus shii Zhang & Li

Chinacerus shii Zhang & Li, 2016: 240 , figs 9–10, 32–41.

Distribution: China (Sichuan).

Chinacerus tubulatus Zhang & Webb

Chinacerus tubulatus Zhang & Webb, 2018: 584 , figs 1–2, 5–6, 9–18.

Distribution: China (Yunnan).

Key to species of Chinacerus (males) from China

Figs 1–12

1 Aedeagal shaft with dentate lateral preapical lamella ( Fig. 20 )............................... C. dentaedeagus sp. nov.

- Aedeagal shaft with lateral margins smooth................................................................. 2

2 Aedeagal shaft tubular, and evently curved dorsally in lateral ( Figs.1–2 )................................. C. tubulatus

- Aedeagal shaft sinuate in lateral view, compressed........................................................... 3

3 Aedeagal shaft with three pairs of processes ( Figs. 3–4 )........................................... C. sexspinosus

- Aedeagal shaft with fewer than three pairs of processes....................................................... 4

4 Aedeagal shaft with pair of processes at apex............................................................... 5

- Aedeagal shaft with two pairs of processes at subapex........................................................ 6

5 Aedeagal shaft with pair of small spine-like processes ( Figs. 5–6 ).................................. C. kangdingensis

- Aedeagal shaft with pair of very short spine-like processes ( Figs. 7–8 )................................... C. dentatus

6 Aedeagal shaft with pair of extremely small spine-like processes ( Figs. 9–10 )........................... C. bispinatus

- Aedeagal shaft without pair of extremely small spine-like processes ( Figs. 11–12 ).............................. C. shii

Figures

FIGURES 1–12. Chinaocerus species, male genitalia 1, 2 C. tubulatus (Zhang & Webb, 2018), aedeagus, lateral and ventral view; 3, 4. C. sexspinosus (Zhang & Webb, 2018), style, lateral view; 5, 6. C. kangdingensis (Zhang & Li, 2016), aedeagus, lateral and ventral view; 7, 8. C. dentatus (Zhang, 2022), aedeagus, lateral and ventral view; 9, 10. C. bispinatus (Zhang & Li, 2016), aedeagus, lateral and ventral view; 11, 12. C. shii (Zhang & Li, 2016), aedeagus, lateral and ventral view.

FIGURES 13–21. C. dentaedeagus sp. nov. 13. adult, dorsal view; 14. adult, lateral view; 15. face; 16. dorsal and ventral abdominal apodemes, dorsal view; 17. male pygofer and male subgential plate, lateral view; 18. connective, dorsal view; 19. style, dorsal view; 20. aedeagus, dorsal view; 21. aedeagus, lateral view.