Macromotettix brachyptera, Lu & Deng, 2021

Lu, Xiang-Yi & Deng, Wei-An, 2021, New genus and new species of the subfamilyMetrodorinae from China (Orthoptera Tetrigidae), Zootaxa 4964 (2), pp. 345-362 : 357-360

Macromotettix brachyptera sp. nov.

( Figures. 7–8 )

Type material. Holotype: female, P. R. China: Guizhou: Dushan (Zilinshan), 25°49’50.97” N, 107°29’34.81” E, 1100m, 30 July 2014, collected by Weian DENG ( EMHU) . Paratypes: 2♀, same data, type locality ( EMHU) ; 1♀, P. R . China: Chongqing: Jiangjin , 28 July 2014, collected by Xinrang LI ( EMHU) .

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

Head. Head a little exserted above pronotal surface. Fastigium of vertex short; in dorsal view, width of vertex between eyes 0.7 times width of compound eye; anterior margin of fastigium straight, not surpassing anterior margin of eye; median carina visible anteriorly; lateral margins slightly turned backward. In lateral view, frontal ridge and vertex forming a right angle shape, invisible between eyes, protruded anteriorly and broadly rounded between antennal grooves. In frontal view, frontal costa bifurcated above lateral ocelli, longitudinal furrow narrowly divergent between antennae, width of longitudinal furrow of frontal ridge narrower than antennal groove diameter. Antennae filiform, antennal grooves inserted below inferior margin of compound eyes, 14-segmented, the 8th and 9th segment are the longest, about 4 times longer than its width. Eyes globose, lateral (paired) ocelli located slightly below middle of compound eye height.

Thorax. Pronotum slightly tectiform and pronotal disc interspersed with dense granules, with sparse coarse tubercles between shoulders. Pronotum with truncate anterior margin and slightly concave in middle of anterior margin, median carina invisible on prozona and entire behind prozona; upper margin of pronotum in profile slightly undulate; lateral carinae of prozona parallel; humeral angle obtuse, without interhumeral carina; hind pronotal process narrow, reaching knee of hind femur and its apex sharply. Humeral apex ridge and lower margin of pronotum connected at four-fifths of lower margin of pronotum. Posterior angles of lateral lobes produced outwards, end of posterior angles truncate, posterior margin of each lateral lobe of pronotum with ventral sinus and tegminal (upper) sinus. Tegmina long, ovate, apex sharply rounded. Hind wings are shortened and reaching about the middle of hind femora.

Legs. Fore femora and middle femora with slightly undulated upper and ventral margins, width of midfemur 1.3 times width of visible part of tegmina. Hind femora robust and short, three times as long as wide, upper margins smooth, ventral margins finely serrated and straight, antegenicular denticles acute and genicular denticles obtuse. Outer side of hind tibia with 5–7 spines, inner side with 5–7 spines. Length of first segment of posterior tarsi longer than third, three pulvilli of first segment of posterior tarsi are increased in turn, apices of first and second acute, apices of third obtuse.

Abdomen. Ovipositor narrow and long, length of upper valvulae 4.0 times its width, upper and lower valvulae with slender saw-like teeth. Length of subgenital plate longer than its width, middle of posterior margin of subgenital plate triangular projecting.

Coloration. Body dark brown; hind wings black. Hind tibia brown, its base and middle and end dark brown.

Male. unknown.

Measurements (mm). Length of body: ♀ 7.6–8.1; length of pronotum: ♀ 6.5–7.0; length of hind femur: ♀ 4.8–5.0.

Diagnosis. New species is similar to Macromotettix tianlinensis Liang & Jiang, 2004 from which it differs in width of vertex between eyes 0.7 times width of compound eye (width of vertex between eyes 1.1 times width of compound eye in M. tianlinensis ); width of longitudinal furrow of frontal ridge narrower than antennal groove diameter (width of longitudinal furrow of frontal ridge wider than antennal groove diameter in M. tianlinensis ); upper margin of pronotum in profile undulate (upper margin of pronotum in profile straight and only slightly swollen between shoulders in M. tianlinensis ); fore femora and middle femora with undulated ventral margins (fore femora and middle femora with straight ventral margins in M. tianlinensis ).

Etymology. The specific epithet is derived from “ brachyptera ”, meaning hind wings are shortened and reaching about the middle of hind femora.

Distribution. P. R. CHINA: Guizhou and Chongqing.

Note. Macromotettix brachyptera Deng was proposed in DENG’s (2016) PhD Dissertation, which has not been published according to the criteria of availability (ICZN 1999: Art. 8.1). The name Macromotettix brachyptera Deng is made available in this paper.

Figures

FIGURE 7A–E. Macromotettix brachyptera sp. nov., female, Holotype: A—body in lateral view; B—body in dorsal view; C—head in dorsal view; D—head in lateral view; E—head in frontal view. (scale bar = 1 mm).

FIGURE 8A–D. Macromotettix brachyptera sp. nov., female, Holotype:A—left fore femur in lateral view; B—left mid femur in lateral view; C—subgenital plate of female in lateral view; A—subgenital plate of female in ventral view. (scale bar = 1 mm).