Vekunta bambusana, Sui, Yong-Jin & Chen, Xiang-Sheng, 2019

Sui, Yong-Jin & Chen, Xiang-Sheng, 2019, Review of the genus Vekunta Distant from China, with descriptions of two new species (Hemiptera, Fulgoromorpha, Derbidae), ZooKeys 825, pp. 55-69 : 55

Vekunta bambusana sp. n. Figs 1, 2, 5-14, 15-19

Type material.

Holotype ♂, CHINA: Guizhou, Wangmo, Dayi (25°22'N, 106°06'E), 21 August 2012, Z-M Chang. Paratypes, Guizhou: 1♂, Wangmo, Dayi, 23 August 2012, Z-M Chang; 2♂♂, Wangmo, Dayi, 13 August 2014, Z-M Chang; 3♂♂4♀♀, Wangmo, Dayi, 13-14 August 2014, Y Liu; 2♂♂, Suiyang, Wangcao (28°07'N, 107°16'E), 29 July 2014, H-Y Sun; 1♂, Suiyang, Wangcao, 29 July 2014, Y-J Wang.

Measurements.

Body length (including forewing): male 5.99-6.37 mm (n = 10), female 6.98-7.03 mm (n = 4); forewing length: male 5.02-5.45 mm (n = 10), female 5.96-6.02 mm (n = 4).

Description.

Coloration. General color yellow. Head (Figs 1, 2, 5-7) yellow. Vertex (Figs 1, 5) yellow, lateral and apical carinae yellow to brownish yellow. Frons and clypeus yellow (Fig. 6). Rostrum (Fig. 7) yellow with apex fuscous. Gena (Fig. 7) yellow. Eyes (Figs 1, 2, 5-7) black, ocelli yellow. Antennae (Figs 5-7) yellow. Pronotum, mesonotum and tegula yellow (Fig. 5). Forewing (Figs 1, 2) yellowish white except costal and clavus margins from base to near apex brown to dark brown, veins yellowish white. Hindwing subhyaline, yellowish white, veins white. Thorax with ventral areas yellow, mesopleura (Figs 2, 7) with an oval black spot. Legs brownish yellow. Genital segment yellow.

Head and thorax. Head (Figs 1, 5) including eyes distinctly narrower than pronotum (1:1.65). Vertex (Figs 1, 5) at base wider than length in middle line (1:0.62), apex narrower than base (1:1.31), straightly projecting before eyes, median carina absent, lateral margin distinctly carinate, posterior margin slightly concave. Frons (Fig. 6) moderately narrow, near frontoclypeal suture widest, disc concave, separated on both sides, subparallel, lateral margin distinctly carinate, median carina absent. Postclypeus (Fig. 6) with median and lateral carinae; anteclypeus with weak median carina, lateral carinae absent. Apical segment of rostrum longer than wide. Antennae (Figs 5-7) short, second antennomere oval, flagellum originated from apical point. Subantennal processes (Figs 6, 7) small. Eyes (Figs 5-7) semicircular; ocelli present, adjacent to eyes. Median length of pronotum short, anterior margin between eyes convex, posterior margin deeply concave, median carina distinct. Mesonotum (Fig. 5) as long as broad, convex, in lateral view raised above vertex, with median and lateral carinae weak, posterior end triangularly depressed. Forewing (Fig. 8) narrow, 3.5 times as long as the widest point, clavus closed, claval veins with a prominent ridge of tubercles, base of costal margin curved inward, costal margin also granulated. Hindwing (Fig. 9) shorter than forewing. Hind tibia without lateral spine.

Male genitalia. Anal tube (Fig. 10) in profile broad at basal half, abruptly narrowed medially, apex evenly turned downward, directed ventrally, anal style sets at basal two-fifths; in dorsal view (Fig. 11), length in middle line approximately three times as long as wide at middle, symmetrical, apical margin evenly incised medially. Pygofer (Fig. 10) in lateral view narrowed, dorsocaudal processes (Fig. 12) of pygofer asymmetrical, right dorsocaudal process distinctly longer than left one. Gonostyli (Fig. 10) bilaterally symmetrical, large, elongate and slightly reaching over apex of anal tube in lateral view, dorsal margin serrate at apex, curved dorsally, inner side of laterodorsal margin with a bifurcate process at base and a finger-shaped process medially. Phallus (Figs 13, 14) asymmetrical, periandrium curved, with a hooked process near middle ventrally directed caudally, apex with two spinous processes, below them with two sheet processes, all visible in both left and right lateral view. Aedeagus at base with a process curved dorsally, pointed ventrally, left side of aedeagus with a laminal process near middle, apex of aedeagus valviform, reaching to middle of periandrium.

Female genitalia. Anal tube (Figs 15, 16) symmetrical and ring-shaped in dorsal view; apex of anal tube slightly exceeding apex of anal style. Abdominal sternite VII (Fig. 17) in ventral view symmetrical, posterior margin protruded medially, with protrusion length shorter than width at base, lateral margin widened toward the middle and then narrowed gradually toward apex, apical margin rounded. Gonapophysis VIII (Figs 17, 18) with nine teeth at ventral margin. Gonapophysis IX (Fig. 19) with two lobes incompletely symmetrical, lateral margin with dense setae, each lobe with a membrane sheet dorsally, blunt apically. Gonoplac (Figs 15, 17) in lateral view nearly rectangular, with a small angulate process at apex dorsally, lateral margin with spiniform setae.

Remarks.

This species is similar to V. pentaprocessusa sp. n., but distinguished from the latter by: gonostyli (Fig. 10) symmetrical (gonostyli asymmetrical, with right gonostylus distinctly larger than left one in V. pentaprocessusa sp. n.); anal tube (Fig. 11) of male symmetrical in dorsal view (asymmetrical in dorsal view in V. pentaprocessusa sp. n.); right dorsocaudal process (Fig. 12) of pygofer in dorsal view distinctly longer than left one in male (left dorsocaudal process in dorsal view slightly longer than right one in V. pentaprocessusa sp. n.); periandrium (Figs 13, 14) with a hooked process near middle ventrally (periandrium with a hooked process near base ventrally in V. pentaprocessusa sp. n.); aedeagus (Figs 13, 14) valviform at apex, reaching to middle of periandrium (aedeagus with five spinous processes at apex, the largest process reaching to base of periandrium in V. pentaprocessusa sp. n.).

Etymology.

The species name is derived from the host plant scientific name, Bambusoideae.

Host plant.

Bamboo.

Distribution.

China (Guizhou).