Macromotettixoides convexa 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 : 51-54

3. Macromotettixoides convexa Deng , sp. nov.

( Figures 7–9 )

Type material. Holotype: ♀, China, Fujian prov., Shanghang (Meihuashan), 25.342921° N, 116.838556° E, 1348m alt., 09 August 2019, collected by Lei XIN, EMHU . Paratypes. 3♀, same data, EMHU .

Description. Female. Small size, short, body surface interspersed with coarse protuberances and carinae.

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 slightly concave on both sides of median carina and undulated, 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-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 equal to antennal groove diameter, anterior inferior margin of compound eye with a small protuberance.Antennae short, filiform, antennal grooves inserted far below inferior margin of compound eyes, 14-segmented, the 9th and 10th 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, pronotal surface interspersed with dense protuberances of variable sizes and short carinae and notchs, distinctly tuberculiform convex between shoulders. Pronotum with truncate or weakly obtuse anterior margin, median carina entire and distinctly arch-like before shoulders and undulated behind shoulders in profile; lateral carinae of prozona slightly lamellar and parallel; humeral angle obtuse; hind pronotal process narrow, reaching knee 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 0.9 mm. Posterior angles of lateral lobes slightly produced outwards, end of posterior angles truncate, posterior margins of lateral lobes of pronotum only with ventral sinus. Tegmina and hind wings absent.

Legs. Fore and middle femora with slightly undulated ventral margins. Hind femora robust and short, 2.7 times as long as wide; with carinated and margins finely serrated, postmedian of lower outer carina of hind femora with two unconspicuous projections; antegenicular denticles and genicular denticles acute. Outer side of hind tibia with 8–9 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: first and second small and apices acute, third large and apices 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 slightly triangular projecting.

Coloration. Body dark brown; antennae dark brown. Hind femur dark brown (in some individuals, hind femora with two light spots). Hind tibia dark brown, with two light rings in the middle.

Male. Unknown.

Measurements (mm). Length of body: ♀ 7.5–8.5; length of pronotum: ♀ 6.5–7.0; length of hind femur: ♀ 4.5–5.0.

Diagnosis. New species can be easily distinguished from other species of the genus by pronotal surface distinctly tuberculiform convex between shoulders. New species is similar to Macromotettixoides wufengensis Zheng, Wei & Li, 2009 from which it differs in width of vertex between eyes 1.4–1.5 times width of compound eye (width of vertex between eyes 2.0 times width of compound eye in M. wufengensis ); pronotal surface interspersed with dense protuberances of variable sizes and short carinae and notchs, and with distinctly tuberculiform convex between shoulders (pronotal surface interspersed with dense granule, and without tuberculiform convex between shoulders in M. wufengensis ), median carina of pronotum undulated behind shoulders (median carina of pronotum straight behind shoulders in M. wufengensis ); middle femora with undulated ventral margins (middle femora with straight ventral margins in M. wufengensis ).

Etymology. The specific epithet is derived from “ convexa ”, meaning disc of pronotum with distinctly tuberculiform convex between shoulders.

Distribution. P. R. CHINA: Fujian.

Figures

FIGURE 7. Macromotettixoides convexa 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 8. Macromotettixoides convexa Deng, sp. nov., holotype female. (A) head, frontal view; (B) pronotum, dorsal view; (C) left fore femur, lateral view; (D) left mid femur, lateral view; (E) left hind femur, lateral view; (F) left hind femur, dorsal view; (G) left hind tibia, lateral view.

FIGURE 9. Macromotettixoides convexa Deng, sp. nov., holotype female. (A) left posterior tarsus, lateral view; (B) ovipositor in lateral view; (C) subgenital plate of female, ventral view.