A synoptic review of Gomphomastacinae (Orthoptera: Eumastacoidea) from the Qinghai-Tibet plateau with a description of new species Author Qiu, Shaoting 0000-0003-0713-1209 College of life sciences, Shaanxi Normal University, Xi’an, China, 710119 & shauuachiu @ snnu. edu. cn; https: // orcid. org / 0000 - 0003 - 0713 - 1209 shauuachiu@snnu.edu.cn Author Xu, Sheng-Quan 0000-0001-7630-632X College of life sciences, Shaanxi Normal University, Xi’an, China, 710119 & xushengquan @ snnu. edu. cn; https: // orcid. org / 0000 - 0001 - 7630 - 632 X xushengquan@snnu.edu.cn Author Huang, Huateng 0000-0002-0011-2091 College of life sciences, Shaanxi Normal University, Xi’an, China, 710119 & huanghuateng @ snnu. edu. cn; https: // orcid. org / 0000 - 0002 - 0011 - 2091 huanghuateng@snnu.edu.cn text Zootaxa 2021 2021-01-07 4903 2 296 300 journal article 8008 10.11646/zootaxa.4903.2.9 a949fd58-a15f-4265-badf-b2d18d3a64b4 1175-5326 4567417 73384735-D706-47A5-A4B7-7F10180208B8 Myrmeleomastax wideis Qiu , sp. nov. Material examined. Holotype :1 Ƌ ,paratypes:1 Ƌ , 5 ♀ . China , Yushu ( Qinghai ), 4390m , ( 33°31’07’’N 96°29’94’’E ), August , 2019. Coll. Ke-Yao Zhang , Zhi-Cuo Dan & Jun-Jie Ge ; deposited in the Zoological and Botanical Museum , Shaanxi Normal University , Xi’an , China ( ZBM ). Description. Male ( Fig. 2 ) . Body size larger, head shorter than the length of pronotum, slightly oblique in profile; antennae club-shaped, shorter than head and pronotum together, with 11 segments and distinctly wider in apical part; eyes larger, oval, almost of equal diameter with subocular furrow; Pronotum flat, crossed by three sulci, the ventral posterior margin of its lateral lobes rounded; the length of the mesosternum seven times width; wings absent; hind femur 5.4 times longer than its width, its lower basal lobes longer than upper ones, inner sides with three black spots; the lower lobes of hind knee rounded; hind tibia with ten apical spines on both inner and outer sides. epiproct slightly conical, posterior margin protrude with a promontory in the middle; cercus conical; extending to the tip of epiproct; Subgenital plate conical; Epiphallus bridged, ancora bud-shaped, anterior projection bend down; basal valves of penis conical, apex blunt. FIGURE.2: Myrmeleomastax wideis sp. nov. A. Ƌ Body, dorsal view; B. ♀ Body, dorsal view; C. Ƌ Body, Lateral view; D. ♀ Body, Lateral view; E. Ƌ End of abdomen, dorsal view; F. ♀ End of abdomen, lateral view; G. Ƌ Phallic complex; H. Ƌ Epiphallus. Female ( Fig. 2 ) . Similar to male but larger and more robust; width of vertex between two eyes 1.8 times wider than frontal ridge between the antennae; epiproct slightly conical, apex acute, with a longitudinal groove in the basal half; valves of ovipositor longer, with slightly obtuse apex, its outer margin serrated; cercus short conical, not reaching the middle of epiproct; subgenital plate subcylindrical, its posterior margin acute. Coloration. Body and antennae yellowish-brown; eyes darkish-brown; hind femur yellowish-brown on both inner and outer sides, with three black spots on the inner side; hind tibia yellowish-brown; abdomen and subgenital plate yellowish-brown. Habitat. Alpine desert steppe. Measurement. (In mm) Body length: Ƌ 10.1-10.5, ♀ 15.1-18.9; pronotum length: Ƌ 1.5-1.7, ♀ 1.6-1.9; hind femur: Ƌ 5.0-5.4, ♀ 6.8-7.5. Diagnosis. The new species Myrmeleomastax wideis sp. nov. is similar to Myrmeleomastax pulvinella Yin 1984 from Amdo ( Tibet ) region, China from which it differs by the characters presented in the Table 1 below. Etymology. The specific epithet is named for a distinct character of this species, because the width of mesosternum of this species is distinctly wider than other species in this genus.