Macromotettix undulatifemura 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 : 424

1. Macromotettix undulatifemura Deng sp. nov.

( Figs. 1–16 )

Female: Body is small and its head not exerted above upper level of pronotum. Vertex wide, its width 1.5 times the width of an eye; anterior margin slightly straight and with a small concavity on both sides of median carina, slightly protruding beyond the eyes; median carina conspicuous before middle, lateral margins turned backward and just above upper level of the eyes. In profile, vertex and frontal costa forming a obtuse-rounded or right angle, frontal costa distinctly concave between lateral ocelli and protruding as arch between antennae, width of longitudinal furrow equals to width of first antennal segment. Antenna filiform, 15-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 a little bit below the middle of anterior margins of eyes.

Disc of pronotum coarse, granulose, distinctly convex and with several larger tubercles between shoulders; anterior margin of pronotum straight, median carina entire; upper margin of pronotum undulate, median carina high and lamellar before shoulders in profile and suddenly depressed behind shoulders; lateral keels of prozona parallel; humeral angle abtuse, without abbreviated carinae between shoulders. Hind process of pronotum narrow, short cone-shaped, apex slightly concave, slightly not reaching, reaching or slightly surpassing the knee of the hind femora but not reaching its apex. Humeral apex ridge and lower margin of pronotum connected behind five sixths of lower margin of pronotum. Posterior angles of lateral lobes of pronotum little produced outwards, obliquely truncate behind, posterior margin of each lateral lobe with two bisinuates. Tegmina smaller, brachypterous, elliptic. Hind wings strongly reduced as strips, length of visible part shorter than length of tegmina and just reaching the base of hind femora. Lower margins of fore and middle femora distinctly undulate, width of middle femora 4 times the width of visible part of tegmina. Length of hind femur 3.1 times its wide, mid keel of dorsal side finely serrated, mid keel of ventral side with five small tubercles and slightly undulated, antegenicular denticles acute and genicular denticles triangular. Outer side of hind tibia with six to seven spines and inner side with five to six spines. Length of first segment of posterior tarsus longer than third, third pulvillus longer than first and second, apices of first and second right angle, apices of third obtuse. 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 equal to its width, middle of posterior margin of subgenital plate slightly triangular projecting.

Body dark brown. Antennae dark brown, the last two segments black. Hind tibia black, with two light ring in the middle.

Male. Similar to female, but smaller and narrower. Vertex 1.2–1.3 times wider than width of one eye, width of midfemur 3 times width of visible part of tegmina. Subgenital plate cone-shaped, apex bifurcated.

Measurements (mm). Length of body ♂ 6.5–7.0, ♀ 9.0–9.5; length of pronotum ♂ 5.5–6.0, ♀ 6.5–7.0; length of hind femur ♂ 4.0–4.5, ♀ 5.0–5.5.

Type material. Holotype: 1♀, 24 July 2016, collected by Wei-An DENG, EMHU. Paratypes. 3♂ 6♀, same data, EMHU .

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

Diagnosis. New species can be easily distinguished from other species of the genus by upper margin of pronotum undulate, median carina high and lamellar before shoulders in profile and suddenly depressed behind shoulders. It also appears similarto Macromotettix qinlingensis Zheng, Wei & Li, 2009 but differs from the latter by lateral keels of prozona parallel (lateral keels of prozona constricted backwards in M. qinlingensis ); upper margin of pronotum undulate, median carina high and lamellar before shoulders in profile and suddenly depressed behind shoulders (upper margin of pronotum slightly arcuate before shoulders and straight behind shoulders in profile in M. qinlingensis ); width of midfemur 3–4 times width of visible part of tegmina (width of midfemur narrower than width of visible part of tegmina in M. qinlingensis ); hind wings strongly reduced as strips, length of visible part shorter than length of tegmina and just reaching the base of hind femora (hind wings reaching middle of hind femora in M. qinlingensis ).

Etymology. The specific epithet is derived from “ undulate ” and “ femura ”, meaning lower margins of fore and middle femora distinctly undulate.

Distribution. China (Sichuan).

Figures

FIGURES 1–11. Macromotettix undulatifemura Deng sp. nov., female, holotype: 1—body in dorsal vieW; 2—body in lateral vieW;3—head in dorsal vieW; 4—head in lateral vieW; 5—head in frontal vieW;6—head and pronotum in lateral vieW; 7—left fore femur in lateral vieW; 8—left mid femur in lateral vieW; 9—left hind femur in lateral vieW; 10—left hind tibia in dorsal vieW;11—left posterior tarsi in lateral vieW.(scale bar = 1 mm).

FIGURES 12–16. Macromotettix undulatifemura Deng sp. nov., female, holotype: 12—ovipositor of female in lateral vieW; 13— subgenital plate of female in ventral vieW; paratype: 14—subgenital plate of male in lateral vieW; 15—male in dorsal vieW of body; 16—male in lateral vieW of body.(scale bar = 1 mm).