Macromotettix sichuanensis Deng, 2018

Deng, Wei-An, Xin, Lei, Wei, Qiao & Chen, Ya-Zhen, 2018, Two new species of the genus Macromotettix Günther, 1939 (Orthoptera: Tetrigidae, Metrodorinae) from China, with a key to the species of the genus, Zootaxa 4370 (4), pp. 421-430 : 426-429

2. Macromotettix sichuanensis Deng sp. nov.

( Figs. 17 –31)

Female: Body is small and its head not exerted above upper level of pronotum. Vertex narrow, its width equal to or slightly narrower than the width of an eye; anterior margin straight and without protruding beyond the eyes; median carina conspicuous before middle, lateral margins turned backward. In profile, vertex and frontal costa forming a right angle, frontal costa before eyes not visible and protruding as arch between antennae, width of longitudinal furrow narrower than width of first antennal segment. Antenna filiform, 14-segmented, length of a segment in middle approximately 3–4 times longer than its width, inserted below lower margins of eyes. Eyes globose. Lateral ocelli placed lower one third of anterior margins of eyes.

Disc of pronotum coarse, with numerous protuberances between and behind shoulders; anterior margin of pronotum straight, median carina entire on metazona; upper margin of pronotum undulate; lateral keels of prozona parallel; humeral angle abtuse, slightly concave and without abbreviated carinae between shoulders. Hind process of pronotum narrow, short cone-shaped, apex reaching the knee of the hind femora. Humeral apex ridge and lower margin of pronotum connected behind five sixths of lower margin of pronotum. Posterior angles of lateral lobes of pronotum produced outwards, end of posterior angles truncate and little rounded, posterior margin of each lateral lobe with two bisinuates. Visible part of tegmina long, ovate, apex sharp. Hind wings strongly reduced as strips, just reaching the base of hind femora. Lower margins of fore and middle femora slightly undulate, width of middle femora 1.5 times the width of visible part of tegmina. Length of hind femur 2.8 times wide, mid keel of dorsal side smooth, mid keel of ventral side with five to seven small tubercles and slightly undulated, antegenicular denticles acute and genicular denticles abtuse. Outer side of hind tibia with four to eight spines and inner side with three to seven spines. Length of first segment of posterior tarsus longer than third, third pulvillus longer than first and second, apices of first and second acute, apices of third right angle. Ovipositor narrow and long, length of upper valvulae four times its width, upper and lower valvulae with slender saw-like teeth. Length of subgenital plate slightly wider than its width, posterior margin of subgenital plate triangular projecting.

Body brown. Antennae brown. Hind wings black. Lower side of outer part of hind femur black. Hind tibia black, with light brown at base and middle.

Male. Similar to female, but smaller and narrower. Width of midfemur 1.5 times width of visible part of tegmina. Subgenital plate cone-shaped, apex bifurcated.

Measurements (mm). Length of body ♂ 6.0–6.5, ♀ 9.0–9.5; length of pronotum ♂ 5.7–6.3, ♀ 6.5–7.0; length of hind femur ♂ 4.0–4.5, ♀ 4.5–5.0.

Type material. Holotype: 1♀, 24 July 2016, collected by Wei-An DENG, EMHU. Paratypes. 7♂ 11♀, same data, collected by Wei-An DENG, Qiao WEI and Shan-Shan HUANG, EMHU .

Type locality. China, Sichuan prov., Shimian ( Liziping ), 28°55’N, 102°19’E, 2300m alt.

Diagnosis. New species is similar to Macromotettix xinganensis Zheng, Zhang & Dang, 2009 from which it differs in disc of pronotum coarse, with numerous protuberances (disc of pronotum smooth in M. xinganensis ); disc of pronotum concave between shoulders (disc of pronotum convex between shoulders in M. xinganensis ); lower margins of fore and middle femora slightly undulate (lower margins of fore and middle femora straight in M. xinganensis ); antennae brown (antennae black in M. xinganensis ); lower side of outer part of hind femur black (hind femur dark brown in M. xinganensis ).

Etymology. The new species was named after the type locality, Sichuan, China.

Distribution. China (Sichuan).

Figures

FIGURES 17–24. Macromotettix sichuanensis Deng sp. nov., female, holotype:17—body in lateral vieW; 18—body in dorsal vieW; 19—head in dorsal vieW; 20—head in lateral vieW; 21—head in frontal vieW; 22—left fore femur in lateral vieW; 23— left mid femur in lateral vieW;24—left hind femur in lateral vieW.(scale bar = 1 mm).