Zhengitettix fengyangshana Deng, 2022

Chen, Ya-Zhen & Deng, Wei-An, 2022, Two new species of the genus Zhengitettix (Orthoptera: Tetrigidae: Scelimeninae) from China, Zootaxa 5154 (1), pp. 71-80 : 76-79

2. Zhengitettix fengyangshana Deng , sp. nov.

( Figures 3–4 )

Description. Female. Small size, short, body surface smooth and interspersed with granules.

Head. Head and eyes distinctly exserted above pronotal surface ( Fig. 3a ). Vertex very narrow, in dorsal view, width of vertex between eyes 0.4–0.5 times width of compound eye ( Fig. 3c ); a little narrower in front, more or less triangular in shape; anterior margin of fastigium not surpassing anterior margin of eye; median carina visible anteriorly; lateral margins turned backward; vertex uneven with paired fossulae. In lateral view, frontal costa not visible between eyes ( Fig. 3d ), protruded anteriorly and broadly rounded between antennal grooves. In frontal view, vertex distinctly concave between lateral margin and median carina; frontal costa bifurcated above lateral ocelli, longitudinal furrow divergent between antennae, width of longitudinal furrow of frontal ridge very narrower than antennal groove diameter ( Fig. 3e ). Antennae short, filiform, antennal grooves inserted between inferior margins of compound eyes, 15-segmented, the 11th and 12th segment are the longest, about 6–7 times longer than its width. Eyes globose, lateral (paired) ocelli located in middle of compound eye height.

Thorax. Pronotal surface smooth and interspersed with dense granules ( Fig. 3b ). In dorsal view, anterior margin of pronotum truncate; lateral carinae of prozona parallel; median carina entire; humeral angles obtuse; with a pair of interhumeral carinae; hind pronotal process narrow and long cone-shaped, reaching one third to two-thirds of hind tibia and its apex truncate. In profile, median carina of pronotum undulate before shoulders and straight behind shoulders. Lateral lobes of pronotum turning outwardly, posterior angles directed distinctly transversely, apex of posterior angles acute and with short spines. Posterior margins of lateral lobes of pronotum with ventral sinus and tegminal (upper) sinus. Tegmina long, ovate, apex narrowly rounded. Hind wings slightly not reaching or reaching apex of hind pronotal process.

Legs. Fore and middle femora carinated, margins finely serrated, ventral margins straight ( Fig. 4a–b ); middle femur equal to visible part of tegmen in width. Hind femora robust and short, 3.4 times as long as wide; with carinae and margins finely serrated ( Fig. 4c ); antegenicular denticles right angled and genicular denticles acute. Outer side of hind tibia with 5 spines, inner side with 3–4 spines ( Fig. 4d ). First segment of posterior tarsi equal to third in length, three pulvilli of first segment of posterior tarsi are increased in turn, apices of all pulvilli obtuse ( Fig. 4e ).

Abdomen. Ovipositor narrow and long, length of upper valvulae 4.6 times its width, upper and lower valvulae with slender saw-like teeth. Length of subgenital plate nearly equal to its width, middle of posterior margin of subgenital plate triangular projecting ( Fig. 4f ).

Coloration. Body dark brown. Frons dark brown. Tegmina pale white and hind wings black. Fore and middle legs brown and first segment of tarsi black. Hind femora brown and outer side with three blackish oblique spots. Hind tibiae dark brown, with two light rings in the middle. Sternites of thorax and abdomen black, subgenital plate yellowish brown.

Male. Similar to female, but smaller and narrower ( Fig. 4g –h ). Width of vertex between eyes 0.5 times width of compound eye ( Fig. 4g ); middle femur 1.2 times as wide as visible part of tegmen. Subgenital plate short, coneshaped, apex bifurcated.

Measurements (mm). Length of body: ♂ 6.5–7.0, ♀ 10.5–11.0; length of pronotum: ♂ 8.5–9.0, ♀ 9.3–10.3; length of hind femur: ♂ 4.5–5.0, ♀ 5.5–6.0.

Type material. Holotype: ♀, China, Zhejiang prov., Longquan (Fengyangshan), 27°53ʹ47ʹʹ N, 119°9ʹ40ʹʹ E, 900 m alt., 6 August 2018, collected by Wei-An Deng, CLSGNU . Paratypes. 5♂, 5♀, same data, collected by Wei-An Deng and Chao-Mei Huang, CLSGNU .

Diagnosis. This new species is similar to Zhengitettix transpicula Zheng & Jiang, 2002 from which it differs in width of longitudinal furrow of frontal ridge very narrower than antennal groove diameter (width of longitudinal furrow of frontal ridge equal to antennal groove diameter in Z. transpicula ); with a pair of interhumeral carinae (interhumeral carinae absent in Z. transpicula ); in profile, median carina of pronotum undulate before shoulders and straight behind shoulders (in profile, median carina of pronotum straight in Z. transpicula ); apex of posterior angles of pronotal lateral lobes with short spines (apex of posterior angles of pronotal lateral lobes with long spines in Z. transpicula ). It is also similar to Zhengitettix nigrofemurus Deng, Zheng & Wei, 2010 but differs from the latter by antennal grooves inserted between inferior margins of compound eyes (antennal grooves inserted below inferior margins of compound eyes in Z. nigrofemurus ); with a pair of interhumeral carinae (pronotum interspersed with sporadic short carinae between shoulders in Z. nigrofemurus ); in profile, median carina of pronotum undulate before shoulders and straight behind shoulders (in profile, median carina of pronotum straight in Z. nigrofemurus ).

Etymology. The new species was named after the type locality, Fengyangshan, Longquan, Zhejiang, China; adjective.

Distribution. P. R. CHINA: Zhejiang.

Figures

FIGURE 3 A–E. Zhengitettix fengyangshana Deng, sp. nov., holotype female. A—body, lateral view; B—the same, dorsal view; C—head and anterior part of pronotum, dorsal view; D—head and anterior part of pronotum, lateral view; E—head, frontal view.

FIGURE 4 A–H. Zhengitettix fengyangshana Deng, sp. nov. holotype female: A—left fore femur, lateral view; B—left mid femur, lateral view; C—left hind femur, lateral view; D—left hind tibia, lateral view; E—left posterior tarsus, lateral view; F—subgenital plate of female, ventral view; male, paratype: G—body in dorsal view; H—body in lateral view.