A new genus with a new species of Shield-back Katydid, with comments on the phylogeny and diagnosis of the genus Kansua Uvarov and the tribe Drymadusini (Orthoptera: Tettigoniidae: Tettigoniinae) from China Author Yin, Zi-Xu College of Fisheries, Ocean University of China, Qingdao 266003, China. Author He, Zhu-Qing Museum of Biology, School of Life Sciences, East China Normal University, Shanghai 200241, China. Author Shen, Chu-Ze Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, and College of Life Sciences, Beijing Normal University, Beijing 10075, China. Author Shen, Zi-Hao Hubei Broad Nature Technology Service Co., Ltd. Wuhan 430079 China. text Zootaxa 2020 2020-06-03 4786 3 369 380 journal article 10.11646/zootaxa.4786.3.3 1175-5326 3876896 75EC395B-6D93-4E6B-BCB1-178CC2E4F622 Sichuana cryptospina Shen & Yin sp. nov. Figs. 2–7 Description. Male. Body rather large. Head frons flat, slightly oblique ( Fig. 2I ). Fastigium of vertex 1.3-1.5 times wider than the scape of antenna ( Fig. 2 HJ; Fig. 5 AC). Eyes broadly round and projecting outward. Disc of prozona with a broadly obtuse concavity on middle part of each side, anterior margin of pronotum slightly concaved and posterior margin blunt, median carina faintly indicated in prozona, absent in metazona, median sulcus distinctly “M”-shaped, lateral carina distinct in metazona, faintly indicated in prozona; lateral lobes longer than deep, with humeral sinus ( Fig. 2 GHJ; Fig. 4D ; Fig. 5 A-D). Prosternum with a pair of slender and short spiniform processes ( Fig. 4C ). Mesosternum with a pair of acute triangular lobe-shaped processes, nearly equal in length to width ( Fig. 4C ). Metasternum with a pair of obtuse triangular lobe-shaped processes, broader than long ( Fig. 4C ). Tegmina expanded, about twice as long as pronotum, with clear longitudinal and cross veins ( Fig. 2 GH; Fig. 3 FG; Fig. 5 AB). Dorsal plane the same width with the disc of metazona from basic part until the middle, then taper off distad ( Fig. 3F ). Lateral plane broadened and deepened, deepest in one sixth of the apical area ( Fig. 3G ). Costal veins weak and short, ended in the middle edges of the wings ( Fig. 3G ). Subcostal vein and radius strong ( Fig. 3G ). Stridulatory file on underside of left tegmina short, with about 24 stridulatory teeth which are widely-spaced arranged ( Fig. 4H ). Mirror on right tegmina pentagonal, around 1.5 times longer than wide ( Fig. 4I ). Hind wings rudimentary, longer than half of the pronotum ( Fig. 4G ). FIGURE 3. Living Sichuana cryptospina sp. nov. , A, C, F, G. male; B, D, E. female; A, B. tenth abdominal tergum; C, D. subgenital plate; E. ovipositor in lateral view; F. tegmen in dorsal view; G. tegmen in lateral view. (photo: Changhao Hu, Chenliang Li and Xiaoran Zhu) Dorsal surface of fore coxae with 1 long spine; fore femora slightly longer or 1.1-1.2 times longer than pronotum, dorsally unarmed, ventrally with 3-5 internal spinules, genicular lobes with 1 external spinule occasionally and 1-2 internal spinules; fore tibiae dorsally armed 3 external spines (one near basal; one middle and one apical) and internal unarmed, ventrally with 6 pair of spines, a pair at the apical. Middle femora dorsally unarmed, ventrally with 0-4 internal spinules and 1-4 external spinules, genicular lobes with 0-2 internal spinules and 1-2 external spinules; middle tibiae dorsally with 4 internal spines (one at apical) and 2 external spines, ventrally with 6 pair of spines, a pair at the apical. Hind femora dorsally unarmed, ventrally with 5-9 spinules on both side; hind tibiae dorsally with 21-30 spines on both side and 1 pair of apical spurs, ventrally with 5-12 spines on both sides and 2 pair of apical spurs. Tenth abdominal tergite with a pair of pileous round blunt lobes on posterior margin ( Fig. 3A ). Cercus conical, strongly incurved at the middle, apices acute, basal area with a spiniform inner tooth placed which hide under tenth abdominal tergite ( Fig. 3 AC; Fig. 4 AB). Subgenital plate length longer than width, with lateral carinae, middle part of posterior margin with a deep triangular excision, styli slender and longer than excision ( Fig. 3C ; Fig. 4B ). Titillators with long apical portions bearing numerous denticles ( Fig. 4E ). FIGURE 4. Sichuana cryptospina sp. nov. , A-E, G-I. male; F. female; A. cercus in dorsal view; B. cercus in ventral view; C. thorax in ventral view; D. pronotum in dorsal view; E. titillators; F, G. hind wings; H. stridulatory file on underside of left tegmen; I. mirror on right tegmen. (photo: Zheyu Chen) Female. Tegmina slightly longer or shorter than pronotum, extending to the third abdominal tergum ( Fig. 2J ; Fig. 5 CD). Hind wings micropterous, slightly shorter than those of males, longer than half of the pronotum ( Fig. 4F ). Cercus conical and pileous ( Fig. 3B ). Posterior margin of tenth abdominal tergum with a wide round projection, apical with a U-shaped notch ( Fig. 3B ). Subgenital plate nearly trapezoid, wider than longer, middle of posterior margin with an angle concave ( Fig. 3D ). Ovipositor shorter than hind femora, slightly decurved at apical part ( Fig. 3E ). FIGURE 5. Body of Sichuana cryptospina sp. nov. , A, B. male holotype; C, D. female paratype; A, C. dorsal view; B, D. lateral view. (photo: Zheyu Chen) Coloration. Body generally brown and green ( Fig. 2 G-J; Fig. 3 ). Frons and lower half of gena flesh-colored ( Fig. 2I ). Upper half of compound eyes yellow ( Fig. 2 G-J). Labrum light orange ( Fig. 2I ). Clypeus beige ( Fig. 2I ). Apex of fastigium of vertex, upper half of gena, disk of pronotum and upper half of lateral lobe of pronotum brown ( Fig. 2 G-J). Lower half of lateral lobe of pronotum white ( Fig. 2 GJ). Dorsal plane of male tegmen brown, lateral part of male tegmen green with white longitudinal veins ( Fig. 2 GH; Fig. 3 FG). Female tegmen brown except green longitudinal veins of lateral part ( Fig. 2J ). Ventral surface of thorax and abdomen green ( Fig. 3 CD). Dorsal abdominal tergum brown, with plenty of yellow dots. Cercus brown, with black apical ( Fig. 3 A-D). Legs dark brown, lower half of hind femora lateral green ( Fig. 2 G-J). Spines of each leg yellowish and apical part black ( Fig. 2 GI). Ovipositor brown ( Fig. 2J ; Fig. 3E ). Measurements(mm). Body (from head to tip of abdomen): ♂ 22.76-25.65, ♀ 21.00-33.61; pronotum: ♂ 8.03- 8.05, ♀ 8.00-9.05; tegmina: ♂ 15.33-18.06, ♀ 7.77-8.75; mirror of right tegmina (from fore to hind): ♂ 3.10-3.20; hind wing: ♂ 6.40-7.00, ♀ 5.40-5.44; fore femora: ♂ 6.77-8.35, ♀ 9.32-9.74; median femora: ♂ 7.95-9.05, ♀ 9.70- 9.87; hind femora: ♂ 23.33-25.80, ♀ 28.80-30.45; fore tibiae: ♂ 8.24-9.90, ♀ 10.25-11.00; median tibiae: ♂ 8.52-9.65, ♀ 10.56-11.24; hind tibiae: ♂ 23.61-25.50, ♀ 28.00-30.78; ovipositor: 21.54-22.42. Material examined. Holotype : ♂ (nymph), China , Sichuan Province , Ngawa Tibetan and Qiang Autonomous Prefecture , Wenchuan County , Miansi town , Mianfeng ( 103°30’8.28”E , 31°21’56.46”N , alt. 1254m ), 10-vi-2019 , coll. Yin Zixu , emergence in vii-2019 ; Paratypes : 1♂ 2♀ (nymphs), same data as in holotype ; 1♂ (nymphs), China , Sichuan Province , Ngawa Tibetan and Qiang Autonomous Prefecture , Wenchuan County , Miansi town , Wayaoping ( 103°29’0.81”E , 31°19’39.15”N , alt. 1438m ), 8-vi-2019 , coll. Yin Zixu , emergence in vii-2019 ; 1♀ (nymphs), China , Sichuan Province , Ngawa Tibetan and Qiang Autonomous Prefecture , Wenchuan County , Weizhou town , Wan ( 103°33’47.13”E , 31°27’38.97”N , alt. 1375m ), 23-vi-2019 , coll. Yin Zixu , emergence in vi-2019 . FIGURE 6. Nature history of Sichuana cryptospina sp. nov. , A. habitat; B. plenty of Bradybaenid spp. snails on the ground, found in type locality; C. a living nymph, found eating Bradybaena carphochroa Möllendorff, 1899 . on Artemisia sp. in type locality; D. adult female laying eggs into the soil; E. egg of S. cryptospina . Natural history. Sichuana cryptospina is univoltine. Hatchlings appear in April and become adults in early July, mate and lay their eggs into the soil several weeks later until dead in late August ( Fig. 6 DE). Nymphs are light grey or light orange ( Fig. 2 A-F). Adults become dark as nutbrown or testaceous ( Fig. 2 G-J). Disk of pronotum be- come flatter when they are in older instar ( Fig. 2 ). Ovipositor of adults slightly longer than those of last instars ( Fig. 2 BDFJ ). Nymphs were found preying on Bradybaena carphochroa (Möllendorff, 1899) in the wild ( Fig. 6C ). Etymology. The spiniform inner teeth on basal area of male cercus hides under the tenth abdominal tergite when they are alive. Crypto- means hidden, comes from the Greek word kruptós . Crypto+spina refers to the hidden spiniform inner teeth placed in basal area of male cercus. Distribution. Sichuan , China . Known only from the type locality. Songs. The adults make songs in the afternoon and at night. The calling song consisted of stereotyped trills ( Fig. 7 A-D). Trills are about 2.1- 3.5 s with 10-70 s interval. In each trill, there are about 70-110 chirps with rate as 33 chirps/s. The frequency of main peak is about 8.74 kHz ( Fig. 7D ). The courtship song consisted of stereotyped trills ( Fig. 7 E-H). Trills are about 0.4- 0.7 s with 0.5- 0.7 s interval. In each trill, there are about 15-25 chirps with rate as 35 chirps/s. The frequency of main peak is about 8.06 kHz ( Fig. 7H ). The parameters are listed in Tab. 2 .