Sinocentrus brevicornis Li & Chen

Li, Feng-E, Yang, Lin, Long, Jian-Kun, Chang, Zhi-Min & Chen, Xiang-Sheng, 2019, A review of the genus Sinocentrus Yuan (Hemiptera, Membracidae, Centrotinae) with description of a new species from China, ZooKeys 886, pp. 135-144 : 135

Sinocentrus brevicornis Li & Chen sp. nov. Figs 1-6 , 7-17 , 18-23

Type material.

Holotype: ♂, CHINA: Hainan, Bawangling, 29 April 2017, Hong-Xing Li. Paratypes: 2♀♀, same data as holotype.

Description.

Body length: male 8.1 mm (N = 1), female 8.9-9.3 mm (N = 2); forewing length: male 7.3 mm (N = 1), female 7.3-7.9 mm (N = 2); width between humeral angles apices: male 3.3 mm (N = 1), female 3.5-3.8 mm (N = 2); width between suprahumeral horns apices: male 4.6 mm (N = 1), female 4.6-5.2 mm (N = 2).

Coloration.

General color black with scattered yellow setae. Eyes pale brown with yellow border in males, pale yellow with black markings in females ( Figs 5 , 6 ), ocelli yellow hyaline. Basal one-third of scutellum dark brown, covered with yellowish-white setae, preapical region yellowish-brown with apical white. Forewing pale yellow hyaline, one-fifth of basal, veins and apical limbus black. Hindwing veins pale brown. Thorax black with pale yellowish pubescence; coxae black with yellow pubescence; trochanter, femur, tibia and tarsus yellowish-brown and tarsal claw dark brown. Abdomen reddish-brown with yellow pubescence, basal part of abdomen with a yellow spot of pubescence, apices of terga and sterna pale yellowish.

Head and thorax. Head in anterior view wider than long, ratio: 2.11:1. Vertex with dorsal and ventral margins slightly arcuated and wave-shaped respectively, with wrinkles on surface and a weak median longitudinal carina. Eyes and ocelli oval, ocelli slightly closer to inner margins of eyes less than to each other. Frontoclypeus distinct and trilobed, margin with sparse setae, apices of lateral and median lobes on same plane, more than half of median lobe extending beyond towards ventral margin of vertex, and apex dorsally slightly upturned. Apex of metopidium convex in anterior view. Posterior pronotal process ending at more than half of forewing cell M3+4 (last apical cell). Humeral angles triangular with apices somewhat blunt. Suprahumeral horns short, width between horns apices nearly half length of body. Scutellum humped basally, large punctures present, longer than wide, apex extended antero-dorsally male, curved ventrally in female ( Figs 2 , 4 ), posterior margin deeply emarginate. Mesothoracic femur without ablateral and adlateral cucullate setae. Metathoracic leg cucullate setae row II irregular.

Male genitalia. Pygofer ( Figs 7 , 11 ) nearly trapezoidal in lateral view; sternite IX ( Fig. 12 ) depressed medially in ventral view. Anal tube cylindrical-shaped in lateral view. Lateral plate ( Figs 7 , 11 , 15 ) with membranous dorsoapical lobe extending dorsally, slightly arcuate with setae; part of other surface with setae, margin incurved in posterior view. Basal half of subgenital plates fused, apex acute, obliquely truncate, distributed evenly setae in ventral view ( Fig. 12 ). Style ( Figs 16 , 17 ) clasp oriented laterally, one-third compressed apically, weakly angled ventrally, lateral surface with setae; style shank with arch at central section. Base of connective W-shaped, distal part membranous and weakly depressed. Aedeagus in lateral view ( Fig. 9 ) nearly C-shaped, apical four-fifths of surface and margin with reverse serrations, the opening at middle-upper of aedeagus, ovoid.

Female genitalia. Sternite VII ( Fig. 20 ) in ventral view with posterior margin concave, lateral margins convex and surface with setae. Pygofer ( Figs 18 , 19 ) in lateral view irregularly quadrilateral, with setae; in ventral view oblong, base slightly acute. Anal tube ( Figs 18 , 19 ) small and oval. Valvifer I ( Fig. 21 ) semicircular and thin; valvulae I knife-shaped, apical three-fourths of dorsal surface sculptured, ventral surface of the apex with a row of small toothed processes. Valvifer II ( Fig. 23 ) shoe-shaped in lateral view, dorsal margin membranous. Basal part of valvulae II ( Fig. 22 ) connected to the apex of “sole”, ramus slender, parallel-sided and evenly curved in basal two-thirds, apex slightly broadened with two indistinct and widely spaced dorsal preapical tooth processes; the one-third of apical broaden slightly. Gonoplac ( Fig. 23 ) connected to base of “sole”, apical third expanded, ventral margin with setae.

Distribution.

China (Hainan).

Etymology.

The word " brevicornis " is derived from the Latins words " brevi -" and " cornu ", referring to having the short suprahumeral horns.

Remarks.

This species is similar to S. sinensis Yuan, 2002, but differs from the latter in: (1) forewing veins black and apical limbus black (veins yellow to light brown, apical limbus hyaline in S. sinensis ) (2) suprahumeral horns short, width between suprahumeral horns apices shorter than body length (as long as body length in S. sinensis ); (3) posterior pronotal process nearly straightly (concave medially in S. sinensis ); (4) scutellum longer than wide (wider than long in S. sinensis ); (5) apex of posterior pronotal process not reaching M3+4 veins (exceeding M3+4 veins in S. sinensis ).

Figures

Figures 1 - 6. Sinocentrus brevicornis Li & Chen, sp. nov. 1 female habitus, dorsal view 2 same, lateral view 3 male habitus, dorsal view 4 same, lateral view 5 head and pronotum anterior view, female 6 head and pronotum anterior view, male. Scale bars: 1 mm.

Figures 7 - 17. Sinocentrus brevicornis Li & Chen, sp. nov. 7 male genitalia, lateral view 8 aedeagus, posterior view 9 aedeagus, lateral view 10 male genitalia, dorsal view 11 male genitalia, posterior view 12 male genitalia, ventral view 13 forewing 14 hindwing 15 lateral plate 16 style, right lateral view 17 style, dorsal view. Scale bars: 0.2 mm (7 - 12, 15 - 17), 1 mm (13 - 14).

Figures 18 - 23. Sinocentrus brevicornis Li & Chen, sp. nov. 18 female genitalia, lateral view 19 female genitalia, ventral view 20 sternite VII, ventral view 21 valvifer I and valvulae I, lateral view 22 valvulae II, lateral view 23 valvifer II and gonoplac, lateral view. Scale bar: 0.5 mm.