Macromotettixoides daiyunshanensis Deng, 2020

Deng, Wei-An, Xin, Lei, Zhang, Rong-Jiao, Huang, Chao-Mei, Xu, Hai-Qing, Tan, Liu-Su & Huang, Su-Qin, 2020, New species and new synonyms of Macromotettixoides (Orthoptera: Tetrigidae) with an updated key, Zootaxa 4852 (1), pp. 41-60 : 43-47

1. Macromotettixoides daiyunshanensis Deng , sp. nov.

( Figures 1–3 )

Description. Female. Small size, short, body surface interspersed with granules.

Head. Head and eyes not exserted above pronotal surface. Fastigium of vertex short; in dorsal view, width of vertex between eyes 1.4–1.5 times width of compound eye; anterior margin of fastigium truncate, 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 shape, frontal costa slightly concave between eyes, protruded anteriorly and broadly rounded between antennal grooves. In frontal view, frontal costa bifurcated above lateral ocelli, width of longitudinal furrow of frontal ridge narrower than antennal groove diameter. Antennae short, filiform, antennal grooves inserted between inferior margin of compound eyes, 15-segmented, the 10th and 11th segment are the longest, about 5–6 times longer than its width. Eyes globose, lateral (paired) ocelli located middle of compound eye height.

Thorax. Pronotum slightly tectiform and pronotal disc interspersed with dense granules. Pronotum with truncate anterior margin; median carina entire, nearly straight in profile (only slightly elevated with swollen base before shoulders); lateral carinae of prozona slightly contracted backward; humeral angle obtuse, with interhumeral carina; hind pronotal process wide, not reaching knee of hind femur, the caudal pronotum suddenly become fine and its apex truncate. Lower margin of hind process straight, lateral carinae of metazona curved, width of the area between the two is 0.4 mm. Posterior angles of lateral lobes produced outwards, end of posterior angles truncate, posterior margins of lateral lobes of pronotum only with ventral sinus. Tegmina absent and with vestigial hind wings.

Legs. Fore femora and middle femora with slightly undulated ventral margins. Hind femora robust and short, 2.9 times as long as wide; with carinated and margins finely serrated, antegenicular denticles and genicular denticles acute. Outer side of hind tibia with 6–7 spines, inner side with 4–5 spines. Length of first segment of posterior tarsi slightly longer than third, three pulvilli of first segment of posterior tarsi equal in length, apices obtuse.

Abdomen. Ovipositor narrow and long, length of upper valvulae 3.1 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 slightly triangular projecting.

Coloration. Body brown or dark brown; antennae brown and the last two segments black. Hind femur brown or dark brown and outer part lower side black. Hind tibia black or dark brown, with two light rings in the middle.

Male. Similar to female, but smaller and narrower. Width of vertex between eyes 1.3–1.4 times width of compound eye. Subgenital plate short, cone-shaped, apex bifurcated.

Measurements (mm). Length of body: ♂ 8.0–8.5, ♀ 9.5–10.0; length of pronotum: ♂ 5.5–6.0, ♀ 6.0–6.5; length of hind femur: ♂ 4.5–5.0, ♀ 4.8–5.3.

Type material. Holotype: ♀, China, Fujian prov., Dehua (Daiyunshan), 25°06.4032ʹ N, 118°21.7027ʹ E, 1050m alt., 11 August 2018, collected by Lei XIN, EMHU . Paratypes. 4♂ 6♀, same data, collected by Lei XIN and Liu-Su TAN, EMHU.

Diagnosis. New species can be easily distinguished from other species of the genus by the caudal pronotum suddenly become fine. New species is similar to Macromotettixoides cliva Zheng, Li, Wang et Niu, 2006 from which it differs in width of vertex between eyes 1.4–1.5 times width of compound eye in female (width of vertex between eyes 2.0 times width of compound eye in female in M. cliva ); median carina of pronotum nearly straight in profile and only slightly elevated with swollen base before shoulders (in profile median carina of pronotum distinctly arched before shoulders in M. cliva ); ventral margins of middle femora straight (ventral margins of middle femora undulated in M. cliva ); the caudal pronotum suddenly become fine and its apex truncate (hind pronotal process wide and its apex narrowly rounded in M. cliva ).

Etymology. The new genus was named after the type locality, Daiyunshan, Dehua, Fujian, China; adjective.

Distribution. P. R. CHINA: Fujian.

Figures

FIGURE 1. Macromotettixoides daiyunshanensis Deng, sp. nov., holotype female. (A) body, lateral view; (B) the same, dorsal view; (C) head and anterior part of pronotum, dorsal view; (D) the same, lateral view.

FIGURE 2. Macromotettixoides daiyunshanensis Deng, sp. nov., holotype female. (A) head, frontal view; (B) hind wing, lateral view; (C) left fore femur, lateral view; (D) left mid femur, lateral view; (E) left hind tibia, lateral view; (F) left hind femur, lateral view; (G) left posterior tarsus, lateral view; (H) ovipositor in lateral view; (I) subgenital plate of female, ventral view.

FIGURE 3. Macromotettixoides daiyunshanensis Deng, sp. nov., paratype male: (A) body, dorsal view; (B) body, lateral view.