Review of the genus Formosatettix Tinkham (Orthoptera: Tetrigidae) with description of new taxa, new synonymy and an updated key to species Author Deng, Wei-An Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, Guangxi 541006, China & Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi 541006, China College of Life Science, Guangxi Normal University, Guilin, Guangxi 541004, China & School of Chemistry and Bioengineering, Hechi University, Yizhou, Guangxi 546300, China Author Luo, Jie-Ling 0000-0002-9378-5243 Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, Guangxi 541006, China & Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi 541006, China College of Life Science, Guangxi Normal University, Guilin, Guangxi 541004, China & luojl 0121 @ 163. com; https: // orcid. org / 0000 - 0002 - 9378 - 5243 Author Huang, Chao-Mei 0000-0003-1046-1348 Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, Guangxi 541006, China & Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi 541006, China College of Life Science, Guangxi Normal University, Guilin, Guangxi 541004, China & hcm 2337244016 @ 163. com; https: // orcid. org / 0000 - 0003 - 1046 - 1348 Author Lin, Li-Liang 0000-0002-9972-4732 College of Life Sciences, Shaanxi Normal University, Xi’an, Shaanxi 710062, China. & ll _ lin @ 163. com; https: // orcid. org / 0000 - 0002 - 9972 - 4732 text Zootaxa 2023 2023-01-13 5228 3 201 243 journal article 226118 10.11646/zootaxa.5228.3.1 cf926743-58e3-46e4-8b3a-b5430c228fca 1175-5326 7532348 CF7244F1-F2FA-4435-BD96-5492BC1AF6B8 15. Formosatettix yueqingensis Deng , sp. nov. ( Figs. 20 , 21 , 24S , 25F ) Description. Female. Small size, short, body surface smooth and interspersed with granules. Head . Head and eyes not exserted above pronotal surface ( Fig. 20B ). Fastigium of vertex short; in dorsal view, width of vertex between eyes 1.6–1.7 times width of compound eye ( Fig. 20C ); anterior margin of fastigium arcuate, 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 rounded-angle shape, frontal costa slightly concave between eyes ( Fig. 20D ), 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 equal to antennal groove diameter ( Fig. 20E ). Antennae short, filiform, antennal grooves inserted between inferior margin of compound eyes, 14-segmented, the 10th and 11th segment are the longest, about 4.0–5.0 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. 20A ). In dorsal view, anterior margin of pronotum acute angle protruding and reaching vertex between the middle of eyes; lateral carinae of prozona parallel and inconspicuous; humeral angle absentCpronotal process narrow, almost reaching knee of hind femur and its apex narrowly rounded. In profile, median carina of pronotum distinctly lamellate and arch-like; lower margin of hind process curved, external lateral carinae of metazona also curved, width of infrascapular area is 0.9 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 slightly undulated or straight ( Fig. 21A, B ). Hind femora robust and short, 3.0 times as long as wide; with carinated and margins finely serrated ( Fig. 21C ); antegenicular denticles and genicular denticles right angled. Outer side of hind tibia with 5–6 spines, inner side with 6–7 spines ( Fig. 21D ). First segment of posterior tarsi longer than third, three pulvilli of first segment of posterior tarsi are increased in turn, apices of all pulvilli acute ( Fig. 21E ). Abdomen. Ovipositor narrow and short, length of upper valvulae 2.8 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. 21F ). Coloration. Body yellow brown or yellow green; antennae brown; both sides of postmedian of pronotum with one or two black spots. Hind femur brown. Hind tibia dark brown, with two light rings in the middle. Male. Similar to female, but smaller and narrower ( Fig. 21G, H ). Width of vertex between eyes 1.5 times width of compound eye ( Fig. 21G ). Subgenital plate short, cone-shaped, apex bifurcated. Measurements (mm) . Length of body: ♁ 9.0–9.5, ♀ 9.5–10.0; length of pronotum: ♁ 7.0–7.5, ♀ 7.8–8.5; length of hind femur: ♁ 4.8–5.5, ♀ 5.5–6.0. TABLE 4. Comparison between Formosatettix yueqingensis Deng , sp. nov. and allied species.

Characters	F. yueqingensis	F. cliva	F. xueshanensis
vertex wide/eye diameter	1.6–1.7(♀)	2.2 (♀)	1.6 (♀)
frontal costa between eyes	concave	straight	straight
width of longitudinal furrow of frontal ridge / antennal groove diameter		1.0	<1.0	<1.0
in dorsal view, anterior margin of pronotum		acute angle projected above the occiput and reaching half the	acute angle projected above the occiput and reaching anterior	obtuse angle projected above the occiput and reaching
longitudinal diameter of an eye	margin of vertex	posterior margin of an eye
external lateral carina metazona	of	curved	straight	curved
in profile, upper margin pronotum	of	strongly lamellate, elevated and distinctly arched	strongly lamellate, elevated and distinctly arched	low and slightly arched
hind pronotal process	narrow	broad	narrow
posterior margin of subgenital plate in female		triangular projecting in middle	with three teeth	triangular projecting in middle

FIGURE 20. Formosatettix yueqingensis 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. FIGURE 21. Formosatettix yueqingensis 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. Type material. Holotype : ♀ , China , Zhejian prov. , Yueqing (Yandangshan), 28°21ʹ35.33ʹʹ N , 121°8ʹ16.96ʹʹ E , 400 m alt., 10 August 2018 , collected by Wei-An Deng, CLSGNU . Paratypes . 1♁, 6♀ , same data, CLSGNU ; 5♁, 4♀ , China , Zhejian prov. , Yueqing (Tashan), 28°8ʹ7.16ʹʹ N , 120°58ʹ12.81ʹʹ E , 250 m alt., 9 August 2018 , collected by Wei-An Deng and Chao-Mei Huang, CLSGNU . Diagnosis. This new species is similar to Formosatettix cliva Deng , sp. nov. and Formosatettix xueshanensis Zheng & Ou, 2010 , but is easily distinguished by morphological characters as shown in Table 4 . Etymology. The new species was named after the type locality, Yueqing, Zhejian, China ; adjective. Distribution. P. R. CHINA : Zhejian.