Thagria incurvata Wang & Zhang

Wang, Xiu-Dan & Zhang, Ya-Lin, 2017, Five new species of the leafhopper genus Thagria Melichar (Hemiptera: Cicadellidae: Coelidiinae) from China, Zootaxa 4250 (3), pp. 219-228 : 223-224

Thagria incurvata Wang & Zhang , sp. nov.

( Figs. 31–39 )

Description. Measurements. Male, body length: 8.63 mm; head width: 2.09 mm; crown length×width: 0.83× 1.11 mm; eye width: 0.65 mm; clypeus length: 1.28 mm; pronotum length×width: 0.87× 2.47 mm; mesonotum length: 1.15 mm. female, unknown.

External morphology. General color brown. Crown with transverse ivory band medially; eyes and ocelli gray ( Fig. 32 ). Face pale brown, with 3 transverse ivory bands ( Fig. 33 ). Pronotum with transverse ivory band near anterior margin, surface with light brown knobs basally; mesonotum light brown ( Fig. 32 ). Forewing with irregular fuscous markings, apical half with four ivory patches; veins with numerous yellow spots ( Fig. 31 ). Legs light brown ( Fig. 34 ).

Head broad but narrower than pronotum, anterior margin rounded; crown short, extending slightly beyond eyes, disk foveate, with striations laterally; coronal suture almost extend to anterior margin of head ( Fig. 32 ). Face with clypeus broad, lateral margins slightly convergent basally; clypellus short, with inflated base ( Fig. 33 ). Crown, pronotum and mesonotum midline ratio about 1:1:1.4. Venation typical for genus.

Male genitalia. Pygofer in lateral view with narrow caudoventral lobe, caudodorsal margin with two processes tapering apically ( Fig. 35 ). Segment X ventral processes short, broad basally and spiculate apically; dorsal connective U-shaped ( Fig. 36 ). Aedeagus tubular, short, reaching about half length of ventral paraphysis; ventral paraphysis broad basally, tapering from base to apex, curved inwardly at apical 1/3 with lateral lobe sharply produced and incurved ( Fig. 38 ). Style very short, with fine process apically; connective longitudinally rectangular ( Fig. 37 ). Subgenital plate segmented, slender, slightly tapered to rounded apex, with numerous short to long fine marginal setae over distal third ( Fig. 39 ).

Material examined. Holotype: male, CHINA: Mengla County, Yunnan Province, 15 MAY 1991, coll. Si- Chun Liu & Wan-Zhi Cai . Paratype: 1 male, CHINA: Mengla County, Yunnan Province, 19 MAY 1991, coll. Ying- Lun Wang & Tian. ( NWAFU)

Etymology. This species name is derived from Latin “ incurvatus ”, referring to the apex of the ventral paraphysis and its lateral lobe both incurved.

Remarks. This species belongs to species group with the clypellus broad and appearance colorful. It is similar to T. fossa ( Nielson, 1977: 79) , but differs in having the ventral processes of segment X short and broad, and ventral paraphysis with subapically lateral lobe sharply produced and incurved.

Figures

FIGURES 31 – 39. Thagria incurvata Wang & Zhang, sp. nov. Holotype: 31. habitus, dorsal view; 32. head and thorax, dorsal view; 33. face; 34. habitus, lateral view; 35. pygofer, lateral view; 36. dorsal connective, pygofer and segment X processes, ventral view; 37. style and connective, ventral view; 38. aedeagus and paraphysis, dorsal view; 39. subgential plate, ventral view. Scale bars: 31 – 34 = 1.0 mm; 35 – 39 = 0.5 mm.