Macromotettixoides curvicarina 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 : 47-51

2. Macromotettixoides curvicarina Deng , sp. nov.

( Figures 4–6 )

Type material. Holotype: ♀, China, Zhejiang prov., Longquan (Fengyangshan), 27°52.5596ʹ N, 119°10.8584ʹ E, 1538m alt., 06 August 2018, collected by Wei-An DENG, EMHU . Paratypes. 5♂ 9♀, same data, collected by Wei-An DENG and Chao-Mei Huang , EMHU ; 2♀, China, Fujian prov., Taining ( Wuyishan ), 27°00.6084ʹ N, 117°07.1163ʹ E, 1513m alt., 05 August 2018, collected by Lei XIN and Liu-Su TAN, EMHU.

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

Head. Head and eyes not exserted above pronotal surface. Fastigium of vertex short; in dorsal view, width of vertex between eyes 1.7–1.8 times width of compound eye; anterior margin of fastigium slightly concave on both sides of median carina and undulated, distinctly 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 distinctly concave between eyes, protruded anteriorly and broadly rounded between antennal grooves. In frontal view, frontal costa bifurcated above lateral ocelli, longitudinal furrow widely divergent between antennae, width of longitudinal furrow of frontal ridge 1.2 times antennal groove diameter. Antennae short, filiform, antennal grooves inserted far below inferior margin of compound eyes, 15-segmented, the 7th and 8th segment are the longest, about 3–3.5 times longer than its width. Eyes globose, lateral (paired) ocelli located lowest third of compound eye height.

Thorax. Pronotum with distinctly tectiform and slightly coarse dorsum; slightly swollen between shoulders and interspersed with sparse protuberances (but in some individuals, swelling and protuberances are not obvious); posterior half of pronotal disc with many net-like wrinkles and notchs. Pronotum with truncate anterior margin, median carina distinctly lamellar and distinctly arch-like in profile; lateral carinae of prozona parallel; humeral angle obtuse, interhumeral carina absent; hind pronotal process wide, slightly surpassing knee of hind femur and nearly reaching apex of hind femur and its apex narrowly rounded. Lower margin of hind process curved, lateral carinae of metazona curved too, width of the area between the two is 0.8 mm. Posterior angles of lateral lobes slightly produced outwards, end of posterior angles slightly truncate or obtuse rounded, posterior margins of lateral lobes of pronotum only with ventral sinus. Tegmina and hind wings absent.

Legs. Fore and middle femora slightly compressed, margins finely serrated, with carinated and slightly undulated ventral margins. Hind femora robust and short, 3.1 times as long as wide; with carinated and margins finely serrated (in some individuals, ventral margins of hind femora with four-five unconspicuous teeth), antegenicular denticles and genicular denticles acute. Outer side of hind tibia with 5–6 spines, inner side with 7–8 spines. Length of first segment of posterior tarsi slightly longer than third, three pulvilli of first segment of posterior tarsi are increased in turn, apices of first and second acute, apices of third right angle.

Abdomen. Ovipositor narrow and long, length of upper valvulae 4.5 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.

Coloration. Body brown or dark brown; antennae brown and the terminal segment black. Hind femur brown or dark brown (outer side with two light colour in some individuals). Hind tibia dark brown, with two light rings in the middle.

Male. Similar to female, but smaller and narrower. Width of vertex between eyes 1.3–1.6 times width of compound eye. Subgenital plate short, cone-shaped, apex bifurcated.

Measurements (mm). Length of body: ♂ 7.5–8.2, ♀ 8.0–8.5; length of pronotum: ♂ 6.5–7.0, ♀ 7.5–8.0; length of hind femur: ♂ 4.5–5.0, ♀ 4.8–5.3.

Diagnosis. New species is similar to Macromotettixoides wufengensis Zheng, Wei & Li, 2009 from which it differs in width of vertex between eyes 1.7–1.8 times width of compound eye in female (width of vertex between eyes 2.0 times width of compound eye in female in M. wufengensis ); width of longitudinal furrow of frontal ridge 1.2 times antennal groove diameter (width of longitudinal furrow of frontal ridge equal to antennal groove diameter in M. wufengensis ); median carina of pronotum arched in profile (in profile, median carina of pronotum arched before shoulders and straight behind shoulders in M. wufengensis ); fore and middle femora with slightly undulated ventral margins (fore and middle femora with straight ventral margins in M. wufengensis ).

Etymology. The specific epithet is derived from “ curvicarina ”, meaning median carina of pronotum distinctly arch-like in profile.

Distribution. P. R. CHINA: Zhejiang and Fujian.

Figures

FIGURE 4. Macromotettixoides curvicarina 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; (E) head, frontal view.

FIGURE 5. Macromotettixoides curvicarina 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) ovipositor in lateral view; (G) subgenital plate of female, ventral view.

FIGURE 6. Macromotettixoides curvicarina Deng, sp. nov., paratype male: (A) body, lateral view (B) body, dorsal view.