Formosatettix cliva Deng, 2023

Deng, Wei-An, Luo, Jie-Ling, Huang, Chao-Mei & Lin, Li-Liang, 2023, Review of the genus Formosatettix Tinkham (Orthoptera: Tetrigidae) with description of new taxa, new synonymy and an updated key to species, Zootaxa 5228 (3), pp. 201-243 : 211-213

4. Formosatettix cliva Deng , sp. nov. ( Figs. 5 , 24D , 25A )

Notes. Formosatettix cliva Deng was proposed in ( Deng’s, 2016) PhD Dissertation, which has not been published according to the criteria of availability ( ICZN 1999: Art. 8.1). The name F. cliva Deng is made available in this paper.

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

Head. Head and eyes not exserted above pronotal surface ( Fig. 5B ). Fastigium of vertex short; in dorsal view, width of vertex between eyes 2.2 times width of compound eye ( Fig. 5C ); anterior margin of fastigium slightly arcuate and slightly surpassing anterior margin of eye; median carina visible anteriorly; lateral margins turned backward; vertex uneven with paired fossulae. In lateral view, frontal ridge and vertex forming a right angle; frontal costa straight above lateral ocelli ( Fig. 5D ), protruded anteriorly and broadly rounded between antennal grooves. In frontal view, frontal costa bifurcated above lateral ocelli, longitudinal furrow divergent between antennae, width of longitudinal furrow of frontal ridge narrower than antennal groove diameter ( Fig. 5E ). Antennae short, filiform, antennal grooves inserted below inferior margins of compound eyes, 14-segmented, the 9th and 10th segment are the longest, about 4–5 times longer than its width. Eyes globose, lateral (paired) ocelli located in middle of compound eye height.

Thorax. Pronotum distinctly compresso-elevated, pronotal surface smooth and interspersed with dense granules ( Fig. 5A ). In dorsal view, anterior margin of pronotum acute angle protruding and reaching anterior margin of vertex; lateral carinae of prozona parallel and inconspicuous; humeral angle and interhumeral carina absent; hind pronotal process broad and short, almost reaching middle of hind femur and its apex obtuse rounded. In profile, median carina of pronotum compressed, strongly elevated and arch-like; lower margin of hind process curved, external lateral carinae of metazona nearly straight, width of infrascapular area is 1.3 mm. Posterior angles of lateral lobes turned downwards, apex of posterior angles obtuse rounded, posterior margins of lateral lobes of pronotum only with ventral sinus and tegminal (upper) sinus absent. Tegmina and hind wings invisible (vestigial hidden under pronotum).

Legs. Fore and middle femora slightly compressed, margins finely serrated, with carinated, ventral margins straight ( Fig. 5F – G ). Hind femora robust and short, 2.6 times as long as wide; with carinated, margins finely serrated ( Fig. 5H ); antegenicular denticles right angle and genicular denticles acute. Outer side of hind tibia with 6–7 spines, inner side with 5–6 spines. First segment of posterior tarsi longer than third, three pulvilli of first segment of posterior tarsi are increased in turn, apices of all pulvilli obtuse.

Abdomen. Ovipositor narrow and long, length of upper valvulae 3.0 times its width, upper and lower valvulae with slender saw-like teeth. Length of subgenital plate nearly equal to its width, posterior margin of subgenital plate with three teeth.

Coloration. Body dark brown; antennae brown. Hind tibia dark brown.

Male. Unknown.

Measurements (mm). Length of body: ♀ 13.5–14.0; length of pronotum: ♀ 9.5–10.0; length of hind femur: ♀ 7.0–7.4.

Type material. Holotype: ♀, China, Yunnan prov., Weixin (Daxueshan), 27°50ʹ16ʹʹ N, 104°46ʹ57ʹʹ E, 1600 m alt., 21 August 2013, collected by Xun Bian, EMHU . Paratypes. 1♀, same data, collected by Xun Bian and Guang- Lin Xie, EMHU .

Diagnosis. This new species is similar to Formosatettix tianlinensis Zheng, 2009 and Formosatettix verrucinotus Ingrisch, 2001 , but is easily distinguished by morphological characters as shown in Table 1 .

Etymology. The specific epithet is derived from “ cliva ”, meaning median carina of pronotum is strongly elevated.

Distribution. P. R. CHINA: Yunnan.

Figures

FIGURE 5. Formosatettix cliva Deng, sp. nov., holotype female.A—Body, dorsal view; B—The same, lateral view; C—Head and anterior part of pronotum, dorsal view; D—The same, lateral view; E—Head, frontal view; F—Right fore femur, lateral view; G—Right mid femur, lateral view; H—Left hind femur, lateral view.

FIGURE 24. The type localities of new species and new synonyms in the genus Formosatettix. A—F. torulosinota; B—F. hainanensis; C—F. guangxiensis; D— F. cliva; E—F. guangyuanensis; F—F. huapingensis; G—F. nanlingensis andF.undulatifemura; H—F.guposhanensis; I—F.latifemurus; J—F.leigongshanensis;K—F. longwangshanensis; L—F.tianmushanensis; M—F.nyalamensis; N—F. serrifemora; O—F. wulongensis; P—F.shuimogouensis; Q—F.strictivertex; R—F. tangjiaheensis; S—F. yueqingensis; T—F. zheminzhengi.

FIGURE 25. Habitats of seven new species of the genus Formosatettix in China. A—F. cliva (Yunnan, Weixin, Daxueshan); B—F. guangyuanensis (Sichuan, Guangyuan, Qingchuan); C—F. shuimogouensis (Sichuan, Chaotian, Shuimogou); D—F. strictivertex (Xizang, Bomi, Pailong); E—F. tangjiaheensis (Sichuan, Qingchuan, Tangjiahe); F—F. yueqingensis (Zhejian, Yueqing, Yandangshan); G—F. zheminzhengi (Guangxi, Jinxiu, Lianhuashan).