Dysanema magna, Zheng & Lin & Zhang & Zeng, 2014

Zheng, Zhe-Min, Lin, Li-Liang, Zhang, Hong-Li & Zeng, Hui-Hua, 2014, One new genus and three new species of wingless grasshoppers from Xizang, China (Orthoptera: Acridoidea), Zoological Systematics 39 (2), pp. 263-268 : 267

Dysanema magna sp. nov. ( Figs 12–15 )

Female. Body medium size; head big, longer than pronotum, vertex wide, anterior margin arc protruded, with median carina; ocular distance 1.66 times as width of frontal ridge between antennae, equal to longitudinal diameter of eyes; foveola rectangular, with length 3 times as its width; front slight oblique in profile, frontal ridge wide, lateral margin slightly hollow at median ocllus, with broad shallow groove; lateral carinae of front straight; antennae filiform, stubby, not reaching posterior margin of pronotum, with length 1.5 times as its width in middle segments; eyes rounded triangular, longitudinal diameter 1.53 times as its horizontal diameter, equal to length of subocular furrow; pronotum wide andshort, anterior margin straight, slightly concave in the middle, posterior margin with a wide hollow; median and lateral carinae obvious, but not severed by transverse furrows, posterior transverse furrow located in the postmedian of pronotum, length of prozona 2 times as that of metazona; height of lateral lobe of pronotum greater than its length, anterior and posterior margin almost parallel, anterior lower angle obtuse, posterior lower angle rounded; mesonotum and metanotum with median carina, without lateral carina; width of mesosternal lobes greater than its length, width of interspace of mesosternal lobes 2 times as its length; lateral lobes of metasternum divided; without wings; length of hind femur 4 times as it width, median carinae on upper and lower margins smooth, top of kneelobe rounded; outer side of hind tibia with 10 spines, inner side with 10 spines, without outer apical spines; arolium small, not reaching half length of claw; terga of abdomen with median carina, without lateral carina; without tympanum; anal plate scutiform; cercus short conical; ovipositor stubby, outer margin smooth. length of subgenital plate greater than its width, posterior margin straight, slightly concave in the middle; ventral basal valvular plate wide and short, with fine puncta.

Body yellowish brown; inside of lateral carinae of pronotum with black longitudinal bands; lateral lobes dark brown in the middle, with a white twill tape; both side of mesonotum, metanotum and tergum of abdomen with a black longitudinal stripe, and with a pair of splayed yellowish brown twill tapes on each black stripe; hind tibia reddish brown, top of ovipositor black.

Length of body: ♀ 29 mm; length of pronotum: ♀ 3 mm; length of hind femur: ♀ 11 mm.

Holotype ♀, China, Xizang, Dingri , 26 July 2005, collected by Ai-Min Shi.

This new species is allied to D. irvinei Uvorov , the main differences are listed in Table 3.

Etymology. The new specific name is derived from the Latin “ magn ”.

© Zoological Systematics, 39(2): 263–268

Figures

Figs 12–15. Dysanema magna sp. nov. 12. Body. 13. Head and pronotum. 14–15. ♀, terminalia. 12. Lateral view. 13–14. Dorsal view. 15. Ventral view. Scare bar = 1mm.