Chinaocerus dentatus Zhang, 2022

Liu, Guihua, Yang, Hefeng, Li, Guoqing, Chen, Zhenning & Zhang, Bin, 2022, A new species of the idiocerine leafhopper genus Chinaocerus Zhang & Li (Hemiptera: Cicadellidae) from northwest China, with a checklist and key to species, Zootaxa 5105 (3), pp. 445-450 : 447-448

Chinaocerus dentatus Zhang sp. nov.

( Figs 1–4 , 5–6 , 7 , 8–17 )

Male. Yellowish brown. Vertex ( Fig. 1 ) with two small black spots closer to adjacent eyes than to median line. Face pale yellow ( Fig. 5 ) with dark brown maculae near dorsal margin, eyes lemon yellow. Pronotum ( Figs 1–2 ) yellowish brown with pair of triangular black marks on anterior margin, posterior margin grayish white. Scutellum light brown with basal triangles dark brown, a round dark spot on either side of median line. Forewings ( Fig. 2 ) yellowish brown, veins dark brown.

Male dorsal basal abdominal apodemes ( Fig. 8 ) shorter than ventral ones, attaining posterior margin of sternite III.

Male genitalia. Pygofer lobe ( Figs 9–10 ) elongate and narrow, with dorsal anterior apodeme developed; anal collar ( Fig. 9 ) with arms elongate with apices hook-like. Apophysis of style ( Fig. 11 ) bearing approximately 15 fine lateral setae distally. Aedeagus ( Figs 14–15 ) with well developed dorsal apodeme bearing pair of acute, fin-like lateral extensions; shaft tapered from base to apex in both lateral and posterior view, in posterior view with pair of very short, indistinct lateral prepical projections above gonopore, in lateral view sinuate, apex foot-like with prepical heel at level of gonopore and relatively broad distal toe.

Female. Color ( Figs 3–4 ) similar to male but face brighter yellow, triangular black marks on pronotum smaller and scutellum markings paler.

Female genitalia. Second valvulae ( Figs 16–17 ) regularly broadened in lateral view, bearing approximately 10 teeth along dorsal margin.

Measurements (mm). Male: body length 5.35–5.5, face length 1.45–1.52, width 1.8–1.85; distance between ocelli 0.45–0.56; distance from ocellus to eyes 0.34–0.35; medial length of pronotum 0.57–0.64, width 1.56–1.57; scutellum length 0.86–86, width 1.15–1.27. Female: body length 6.0–6.15, face length 1.65–1.71, width 1.95–1.98; distance between ocelli 0.56–0.58; distance from ocellus to eyes 0.34–0.36; medial length of pronotum 0.64–0.68, width 1.64–1.66; scutellum length 0.96–0.98, width 1.25–1.27.

Material examined. Holotype: ♂, China, Qinghai Province, Huzhu County, 17. viii. 2007, Bin Zhang. Paratypes: 3♀♀, same date as holotype; 1♂, China, Gansu Province, Zhangxian County, 04. x. 1987, Zhitai Sun ; 1♀, China, Gansu Province, Mount Lianhuashan , 04. x. 1987, Zhitai Sun ; 15♂♂, 21♀♀, China, Qinghai Province, Menyuan County (43.31496°N, 102.81495°E), altitude 2686 m, 26. vii. 2021, Bin Zhang; 3♂♂, 4♀♀, China, Qinghai Province Menyuan County , 26. iv. 2021, Hefeng Yang and Guoqing Li.

Host plant. Salix sp.

Distribution. China: Qinghai and Gansu.

Diagnosis. C. dentatus resembles C. kangdingensis but differs in having the anal collar with arms elongate and apices hook-like, and the aedeagus with a lamellate process with serrated margins on the preatrium and the shaft lacking lamellate processes at midlength.

Etymology. The species name refers to the dentations on the lamellate processes of the dorsal apodeme of the aedeagus.

Figures

FIGURE 7. Photo of live individuals. C. dentatus female and male.

FIGURES 1–4. Dorsal and lateral habitus of Chinaocerus dentatus Zhang sp. nov.. 1–2. Male; 3–4. Female.

FIGURES 5–6. Head and face of Chinaocerus dentatus Zhang sp. nov., 5. Male; 6. Female.

FIGURES 8–17. Chinaocerus dentatus genitalia. 8. Dorsal and ventral male abdominal apodemes, dorsal view; 9. Male genital capsule, lateral view; 10. same, dorsal view; 11. Style, lateral view; 12. Connective lateral view; 13. Connective ventral view; 14. Aedeagus, lateral view; 15. Aedeagus, ventral view; 16. Second valvula of ovipositor, lateral view; 17. Apex of second valvula of ovipositor, lateral view.