Tricentrus foliocornatus Yuan & Fan, 2002

Li, Feng-E, Yang, Lin, Long, Jian-Kun, Chang, Zhi-Min & Chen, Xiang-Sheng, 2020, First Description of Adult Males of Four Species of the Treehopper genus Tricentrus Stål from China (Hemiptera, Membracidae, Centrotinae, Tricentrini), Zootaxa 4894 (2), pp. 247-260 : 252-253

Tricentrus foliocornatus Yuan & Fan, 2002

Tricentrus foliocornatus Yuan & Fan, 2002: 411 .

Description. Body length (including forewing): male 6.4mm (N=1); forewing length: male (damaged) 4.8mm (N=1); width between suprahumeral horn apices: male 2.2mm (N=1); width between humeral angle apices: male 2.6mm (N=1).

Coloration. Dorsum wine-red. Ocelli and eyes yellow-brown. Femora black. Forewing yellow-brown with crescent-shaped white transparent stripe near midlength and with the following parts bearing white, waxy, pubescence with the exception of the head, pronotum and forewing veins yellow: thoracic pleura, coxae, inner surfaces of legs.

Head and thorax. Vertex with dorsal and ventral margins bow-shaped and slightly oblique respectively; ocelli slightly closer to inner margins of eyes than to each other; frontoclypeal margins broadly expanding ventrad, frontoclypeal lobes distinct and half as long as frontoclypeal margins ( Fig. 5A ). Pronotum with suprahumeral horns growth forward, beyond vertex, ( Fig. 5B ); posterior pronotal process terminating approximately at two-thirds of clavus forewing ( Fig. 5B ). Basal fourth of forewing with opaque sclerotization, with punctures, veins M and Cu fused for approximately basal fourth of wing, veins M+Cu and R fused basally ( Fig. 5E ). Metathoracic tibia with three longitudinal rows of cucullate setae, and trochanter with small processes ( Fig. 5C ).

Male genitalia. Pygofer nearly rectangular, distinct carina present anteriorly on dorsal half ( Fig. 5G ); nearly annular in posterior view ( Fig. 5J ). Sternite IX longer than width ( Fig. 5H ). Lateral plate slightly medially depressed, apex slightly convex, dorsal lobe narrow and extended in the middle ( Fig. 5K ). Basal two-thirds of subgenital plate fused ( Fig. 5J ). Style clasp angled dorsally; recurved distally, dorsal surface bearing setae; connective N-shaped ( Fig. 5M ). Aedeagus C-shaped in lateral view, narrow in anterior view, apical half with serrations covering both interior faces ( Figs 5I, 5L ).

Specimens examined. 1³, China: Zhejiang, Hangzhou City linan, 19 August 2011, Bing Li .

Distribution. China (Fujian, Zhejiang).

Remarks. This species may be distinguished by the following characteristics: 1) supraumeral horns growth forward, beyond vertex, foliaceous; 2) forewing yellow-brown with white transparent crescent-shaped medial stripe, and with two rows of setae; 3) inner surfaces of legs with white, dense setae. Specimens examined were from Zhejiang, the province neighboring Fujian which is home to the type locality.

Figures

FIGURE 5. Tricentrus foliocornatus Yuan & Fan, 2002 A, B, D) Male habitus, frontal view, lateral view, dorsal view. C) Metathoracic leg. E) Forewing. F) Hindwing. G, H, J) Male genitalia, lateral view, ventral view, posterior view. I, L) Aedeagus, lateral view, posterior view. K) Lateral plate, posterior view. M) Style, dorsal view. Scale bar: 1mm (A–F), 0.2mm (G–M).