Nigrimacula xizangensis ( Jiao & Shi, 2013 ) Jiao & Shi, 2013

Shi, Fuming, Bian, Xun & Zhou, Zhijun, 2016, Comments on the status of Xiphidiopsis quadrinotata Bey-Bienko, 1971 and related species with one new genus and species (Orthoptera: Tettigoniidae: Meconematinae), Zootaxa 4105 (4), pp. 353-367 : 363-364

Nigrimacula xizangensis ( Jiao & Shi, 2013) com. nov.

( Figs. 6 , 7, 8 C–D; Map 1 )

Xizicus (Axizicus) xizangensis Jiao & Shi, 2013 In : Jiao et al., 2013. Zootaxa, 3694(3): 298. Meconemopsis quadrinotata Wang et al., 2015 . Zootaxa, 3941(4): 523.

Location of type specimen: Museum of Hebei University.

Specimens examined. Holotype: male, Mêdog, Nyingchi, Xizang, China, 10 September, 2010, coll. Shaoli Mao. Paratypes: 2 males, Mêdog, Nyingchi, Xizang, China, 10 September, 2010, coll. by Shaoli Mao; 1 male, Mêdog, Nyingchi, Xizang, China, 14 August, 2003, coll. by Guodong Ren. Other specimens: 1 male, Beibung, Mêdog, Xizang, China, 30 July, 2014, coll. by Guanglin Xie; 1 female, Beibung, Mêdog, Xizang, China, 1 August, 2014, coll. by Guanglin Xie; 1 male, Beibung, Mêdog, Xizang, China, 3 August, 2014, coll. by Guanglin Xie; 1 female, Mêdog, Xizang, China, 5 August, 2014, coll. by Guanglin Xie.

Description. Female. Head. Fastigium verticis conical, dorsal surface with a distinct median sulcus. Eyes nearly subglobal, protruding outwards ( Fig. 6 A). Apical segment of maxillary palpi slightly longer than subapical one, apex inflated.

Thorax. Pronotum with anterior margin almost straight, posterior margin obtusely rounded ( Fig. 6 A); lateral lobe longer than high, ventral margin undulating, posterior margin with humeral sinus distinct ( Fig. 6 B).

Legs. All femora unarmed on ventral surface. Procoxae with a short spine. Pro- and mesotibiae with 4 pairs of minute spines on ventral surface and a pair of apical spines; tibial tympana opened on both sides, inner one slightly larger than outer one. Posttibiae with 21–22 inner and 21 outer spines on dorsal surface, ventral surface with 5–6 minute outer spines, apices with 1 pair of dorsal and 2 pairs of ventral spurs.

Wings. Tegmina just reaching apices of posttibiae; apices obliquely rounded. Hind wings slightly longer than tegmina, surpassing apices of posttibiae.

Abdomen. Posterior margin of tenth abdominal tergite with a triangular concavity in the middle. Epiproct ligulate. Cerci conical, curved upwards, their apices acute. Subgenital plate nearly trapezoidal, longer than broad, basal area broad, narrowing, posterior margin almost straight, centre of which slightly concave ( Fig. 6 D). Twothirds basal area of ovipositor almost straight, the other area slightly upcurved; dorsal and ventral margins smooth, apices of dorsal valvulae acute, ventral ones with a terminal hook separately ( Fig. 6 C).

Coloration. Body yellowish green, alive green ( Fig. 7). Eyes brown. Fastigium verticis black, occiput with 1 longitudinal light brown stripe, which extending to disc of pronotum. Anterior margins of pronotum and metazona with 1 pair of black spots separately.

Distribution. China (Xizang).

Measurements (mm). BL: ♂ 8.220–9.208, ♀ 9.870–11.600; PL: ♂ 3.230–3.577, ♀ 2.982–3.346; PFL: ♂ 7.739–7.849, ♀ 8.637–8.954; TL: ♂ 14.827–16.261, ♀ 16.419–18.132; Ov: 7.583–9.297.

Remarks. This species is only known from the type locality and similar to Nigrimacula quadrinotata (Bey- Bienko, 1971) com. nov., but differs in the shape of male cerci and subgenital plate of both sexes. The detailed differences have been present in the key.

Figures

MAP 1. Known distribution of the genus Nigrimacula gen. nov.

FIGURE 6. Nigrimacula xizangensis (Jiao & Shi, 2013) com. nov., female: A – B. head and pronotum: A. dorsal view; B. lateral view; C. apex of abdomen in lateral view; D. subgenital plate in ventral view.

FIGURE 8. Habitus lateral view of Nigrimacula spp.: A, C, E. male; B, D, F. female: A – B. Nigrimacula paraquadrinotata (Wang, Liu & Li, 2015) com. nov.; C – D. Nigrimacula xizangensis (Jiao & Shi, 2013) com. nov.; E – F. Nigrimacula quadrinotata (Bey-Bienko, 1971) com. nov.