Pentaspinula unispinula Ge, 2021

Ge, Jun-Jie, Agrippine, Yetchom Fondjo Jeanne, Xu, Sheng-Quan & Huang, Huateng, 2021, Description of three new species of Gomphomastacinae (Orthoptera Eumastacoidea) from the east of Qinghai-Tibet plateau, China, Zootaxa 5068 (3), pp. 419-427 : 425

Pentaspinula unispinula Ge , sp. nov.

Material examined. Holotype: 1 ♂. China, Jiangda (Tibet), 4345 m, (31°34’49’’N 98°05’52’’E), August, 2020. Coll. Jun-Jie Ge, Ke-Yao Zhang & Kuo Sun; deposited in the Zoological and Botanical Museum, Shaanxi Normal University, Xi’an, China. ( ZBM).

Description. Male ( Fig. 3 ). Body compressed, with smaller size; head shorter than the length of pronotum, fastigium of vertex with truncate apex, slightly prominent between the eyes, median keel distinct, anterior margin and lateral margin of vertex with distinct keels, face oblique in profile, forming a blunt angle fastigium; frontal ridge sulcate and widened at vertex, constricted above the lateral ocellus and parallel to median ocellus, constricted under median ocellus and parallel to clypeus, prominent between antennae; antennae clavate, longer than head and pronotum together and 15 segments; eyes oval, longitudinal diameter is 1.4 times than the horizontal diameter and 1.2 times than the length of subocular furrow; pronotum flattened, with distinct median keel and irregular lateral keels, its anterior margin subtruncate, posterior margin strongly incised mesally, forming a triangular structure, its apex being in continuity with the median keel; width of mesosternum lobes interspace almost 4 times than length; wings, sound producing organ and tympanum absent; hind femur 4.8 times longer than its width, upper median keel smooth, with one spine; hind tibia with 12 outer and 11 inner spines; apex of the lower outer side with one spine near the lower spur, inner side spurs length different, upper spur length 1.5 times longer than lower spur, outer side spurs length equal; first segment of hind tarsus above with one inner and three outer teeth; arolium of tarsus tiny; tergum with distinct median and lateral keels; epiproct triangle, apex slightly narrow; cerci long conical, apex blunt, its length more than tip of epiproct; subgenital plate short conical ( Fig. 3C ); epiphallus bridged, lophi slender and hook-like, lateral plate wide and short, with flaky structure on lateral side ( Fig. 3D ); phallic structure simple, forming a U-shaped, dorsal with two small flaky structures, apical valves of penis hook-like ( Fig. 3E ).

Female unknown.

Coloration. Body dark-brown; apical second to sixth segments of antennae black-brown, apical first segment antennae yellowish; sternum and tergum yellowish-brown; anterior, median and hind femurs with gray and darkbrown stripe; a yellowish-brown band running along the dorsal surface of the mesothorax and continuing to the eighth abdominal segment; epiproct and cerci brownish.

Habitat. Alpine brushwood.

Measurements. Body length: ♂ 11.4 mm; pronotum length: ♂ 1.5 mm; hind femur: ♂ 7.8 mm.

Diagnosis. Antennae 15 segments. Hind femur with 1 spine. Epiphallus bridged, lophi slender and hook-like, lateral plate wide and short, with flaky structure on lateral side; phallic structure simple, forming a U-shaped, dorsal with two small flaky structures, apical valves of penis hook-like. The new species Pentaspinula unispinula sp. nov. is similar to Pentaspinula calcara Yin, 1979 China, Tibet, Pulan. Some of the characteristic differences are shown in Table 3 .

Figures

FIGURE 3. Pentaspinula unispinula sp. nov. A. ♂ Body, dorsal view; B. ♂ Body, Lateral view; C. ♂ End of abdomen, dorsal view; D. ♂ Epiphallus; E. ♂ Phallic complex.