Paraxantia kaquewa Wu & Liu, 2021

Wu, Chao & Liu, Chun-Xiang, 2021, Two new species of Paraxantia Liu & Kang (Tettigoniidae: Phaneropterinae Vosiini) from Eastern Himalayas, Zootaxa 5016 (1), pp. 117-126 : 121-125

Paraxantia kaquewa Wu & Liu sp. nov.

Figs. 3D , 4B, 4D , 7A–B

Type Material. Holotype. 1♂, China: Yunnan Province, Nujiang of the Lisu Autonomous Prefecture , Gongshan County, Dulongjiang Township , Qinlangdang , N 27.6887° E 98.2775°, 1248m, 2015.VI.25, leg. Chao Wu ( IZCAS) . Paratypes. 1♀, 2♂ ditto ( IZCAS) .

Description. Male.

Measurements (mm). length of pronotum: ♂ 11.4–11.6, ♀ 12.3; length of tegmen: ♂ 67.8–68.5, ♀ 70.2; width of tegmen: ♂ 24.5–24.9, ♀ 26.5; length of anterior femur: ♂ 10.5–10.8, ♀ 12.1; length of middle femur: ♂ 11.7–12.0, ♀ 15.8; length of posterior femur: ♂ 30.2–31.0, ♀ 31.5; length of ovipositor: 14.7.

Head. Ovoid, elongate, occiput convex and smooth. Compound eyes elongate, protruding. Antennae slender, long and flexible, shorter than body.

Pronotum. Pronotum gradually tilting and widened backwards; anterior margin concave, posterior margin convex with a small middle notch; with deeply engraved first transverse groove; pronotum with lateral carinae with minute, inconspicuous teeth; surface of disk with one oblique slightly granular line emanating from the middle of each lateral carina, not extending to the posterior margin; lateral lobes deeper than long; anterior margin straight, posterior margin slightly arched.

Legs. Fore femur shorter than pronotum, widened in apical half, external margin with 9–12 spines. Middle femur normal, swollen in apical half, external margin with 9–12 spines. Fore and middle tibiae normal, feebly flat, with sparse small spines; fore tibia with tympanum conchate on both sides, opening of tympanum very narrow, slight swelling at tympana area. Hind legs elongate; femur widened in basal half and gradually narrowed towards the apex, a slight swelling near knee; external ventral margin with 23–24 spines, sparse; tibia with both dorsal margins slightly swollen in basal half, dorsally bearing 24–26 external and 27–29 internal spines. Tarsus of each leg short and wide.

Wings. Tegmen and hind wing fully developed, tegmen conferring a leaf-like appearance. Tegmen noticeably longer than abdomen, opaque, with numerous faint cross veinlets; widened in middle before and tapering to rounded apex. Costa normal, costal field widened with oblique cross veins; subcostal vein and radial vein joined at base, then separated but closely abutted together to nearly the apical part of tegmen. Hind wing projecting beyond tegmen, wide, colorless and transparent except for the tip, veins pale green. Stridulatory file of left tegmen slim, elongate, with outer end feeblyh directed upwards, about 6.4–6.7 mm long, with 110–120 densely arranged teeth; stridulatory teeth densely arranged, those teeth in distal area much smaller ( Fig. 3D ).

Abdomen. short, compressed. Tenth abdominal tergum broad, concave in middle; supra-anal plate hairy; subgenital plate elongate, broad basally, tapering sharply into a narrow apical half, with notch at apex, with rather short, robust styli. Cercus robust, hairy, bifurcate at distal, dorsal tooth upright, gradually tapering in basal half and incurved at apex; ventral tooth incurved, directed horizontally inwards, with sharp apex ( Fig. 4B ).

Genitalia ( Fig. 4D ). Epiphallus small, basally pigmented; titillator short, narrow, triangular in lateral view, with numerous tubercles, arms closely separated, touching basally. Phallic lobes slightly sclerotised, more or less pigmented on the edges.

Coloration. Overall yellow-green, and yellowish color on head and thorax more intense; thorax laterally with some purple-brown spots, more prominent when alive. Antennae pale brown. Base of fore legs rose coloured. Hindwings hyaline, except for apex yellow, veins pale green. Abdomen and cerci yellow-green.

Female ( Figs. 7A–B ). Robust, similar to male, but larger. Cercus conical, slightly incurved, surface densely hairy. Ovipositor prominent, falcate; tip round and blunt, with small teeth on the both margins ( Fig. 7B ). Coloration s imilar to male, but more greenish; ovipositor yellow-green, with brownish apex.

Etymology. The new species was named after the traditional festival of the Dulong Ethnic Minority the Kaquewa Festival.

Discussion. This species is similar to Paraxantia rubripes sp. nov., but differs in the pronotum, stridulatory file, male cerci, male external genitalia, and rose-colored base of the fore leg.

Distribution. China: Yunnan, Dulongjiang.

Figures

FIGURE 3. Male stridulatory file on underside of left tegmen. A: Xantia borneensis Brunner von Wattenwyl; B: Paraxantia tibetensis Liu & Kang; C: Paraxantia rubripes sp. nov.; D: Paraxantia kaquewa sp. nov..

FIGURE 4. Paraxantia spp., A, C: P. rubripes sp. nov.; B, D: P. kaquewa sp. nov.; A, B: male cerci, multi-angle view; C, D: titillator.

FIGURE 7. Paraxantia kaquewa sp. nov., female. A: in nature; B: ovipositor; C: Eulophidae (Hymenoptera) species under the wings.