Tricentrus oedothorectoidis 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 : 253-258

Tricentrus oedothorectoidis Yuan & Fan, 2002

Tricentrus oedothorectoidis Yuan & Fan, 2002: 416 .

Description. Body length (including forewing): male 6.4mm (N=1); female 7.5mm (N=1); forewing length: male 5.3mm (N=1); female 6.4mm (N=1); width between suprahumeral horn apices: male 3.9mm (N=1); female 5.1mm (N=1); width between humeral angle apices: male 3.1mm (N=1); female 3.6mm (N=1).

Coloration. Black, eyes dark brown with black spots and orange border, ocelli pale yellow. Distal quarter of forewing dark brown, veins R, M black (in female yellow-brown), Cu, A yellow-brown. With the following parts yellow pubescent except surface of abdomen and coxae silvery: head, pronotum, part of thorax, basal fifth of forewing.

Head and thorax. Head nearly rectangular in anterior view, longer than width at base by 2:1; ocelli slightly closer to inner margins of eyes than to each other; frontoclypeal margins broadly expanding, frontoclypeal lobes distinct and almost touching or slightly surpassing ventral margins of vertex ( Figs 6C, 6F ). Pronotum with heavy punctures; suprahumeral horns short and stocky, horizontally extended laterally and slightly distally recurved; posterior pronotal process ending at base of forewing cell M 3+4 (last apical cell), with four carinae, median carina extended full-length, lateral carinae extended from dorsad of scutellum apical third to apex of posterior pronotal process, ventral carina extended from middle to apex ( Figs 6 A–6B, 6D–6E). Basal fifth of forewing with opaque sclerotization with punctures, veins M and Cu fused in basal fourth and strongly divergent, veins M+Cu and A fused basally ( Fig. 6H ). Metathoracic tibia with three longitudinal rows of cucullate setae and trochanter with robust processes ( Fig. 6G ).

Male genitalia. Pygofer in lateral view convex on dorsal margin basally ( Fig. 7A ), nearly annular in posterior view ( Fig. 7C ). Sternite IX wider than long ( Fig. 7D ). Lateral plate with slight median depression and fingerlike dorsal lobe at base, apex blunt ( Fig. 7B ). Basal two-thirds of subgenital plate fused ( Fig. 7D ). Style clasp oriented laterally, angled dorsally, distally recurved, surface with setae, connective N-shaped ( Fig. 7F ). Aedeagus in lateral view hook-shaped, narrow in anterior view, more than half of the surface and margin with coarse denticuli ( Figs 7E, 7G ).

Female genitalia. Sternite VII in ventral view with posterior margin concave, surface with setae ( Fig. 8B ). Pygofer in lateral view somewhat depressed, much lonter than wide, with setae; in ventral view oblong, apex slightly constricted ( Figs 8 A–8B). First valvulae long, moderately broad and slightly curved, apex acute ( Fig. 8C ). Second valvulae knife-shaped, slightly broadened distally, apical third irregularly serrate dorsally ( Figs 8D, 8F ). Third valvulae (gonoplac) with distal half expanded, ventral margin with setae ( Fig. 8E ).

Specimens examined. 1³, China: Yunnan, Baoshan County, 15 August 2018, Nian Gong; 1♀ , China: Guizhou, Anshun City , Ziyun County, 7 June 2019, Yong-qin Fang .

Distribution. China (Yunnan, Guizhou).

Remarks. This species may be distinguished by the black overall coloration; the pronotum shiny and somewhat iridescent with the short, stocky suprahumeral horns horizontally extended laterally and slightly upward, with apices slightly upturned; and the distal quarter of the forewing dark brown.

Figures

FIGURE 6. Tricentrus oedothorectoidis Yuan & Fan, 2002 A, B, C) Female, lateral view, dorsal view, frontal view. D, E, F) Male, lateral view, dorsal view, frontal view. G) Metathoracic leg. H) Forewing. I) Hindwing. Scale bar = 1mm.

FIGURE 7. Tricentrus oedothorectoidis Yuan & Fan, 2002 A, C, D) Male genitalia, lateral view, ventral view, posterior view. B) Lateral plate, posterior view. E, G) Aedeagus, lateral view, posterior view. F) Style, dorsal view. Scale bar = 0.2mm.

FIGURE 8. Tricentrus oedothorectoidis Yuan & Fan, 2002 A, B) Female genitalia, lateral view, ventral view. C) First valvula. D, F) Second valvula, apical of second valvula. E) Third valvulae (gonoplac). Scale bar = 0.5mm.