Nigrimacula trigona Duan, Su, Shi & Chang, 2023

Yao, Yuqing, Bian, Xun & Zhang, Bin, 2025, Description of the female of Nigrimacula trigona Duan, Su, Shi & Chang, (Orthoptera: Tettigoniidae: Meconematinae) from Yunnan, China, Zootaxa 5609 (1), pp. 132-136 : 133-135

Nigrimacula trigona Duan, Su, Shi & Chang, 2023

ĦŴmẘDz

Figures 1 , 2

Description. Female (first description). Body slightly larger than male.

Head. Fastigium verticis conical, dorsal surface with a median furrow ( Fig. 1A ). Eyes nearly globular, protruding outward. Apical segment of maxillary palp, longer than subapical one, apex inflated. Thorax. Pronotum short, anterior margin almost straight, posterior margin narrowly rounded, with weakly posterior transverse sulcus ( Fig. 1A ); lateral lobes longer than high, with shallowly humeral sinus ( Fig. 1B ). Tegmina and Wings. Tegmina just reaching apices of posttibiae with apices obliquely rounded; hind wings shorter than tegmina. Legs. Procoxae with 1 small spine. All femora unarmed on ventral surfaces; apices of genicular lobes of postfemora obtuse. Pro- and middle tibiae ventrally with 4 pairs of spines; tympana of protibiae open on both sides, oblong. Posttibiae with 15– 20 internal and 16–18 external spines on dorsal surface, ventral surface with 3 internal spinules, apices with 1 pair of dorsal spurs and 2 pairs of ventral spurs. 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 longer than broad, basal half subrectangular with lateral margins constricted, apical half roughly triangular with posterior margin narrowly rounded ( Fig. 1K ). Basal half 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. 1J ).

Coloration. Body greenish when alive. Eyes brown. Fastigium verticis black, occiput with a longitudinal yellowish brown stripe, which extends to middle area of tegmina ( Fig. 2 ). Pronotal disc with 2 pairs of black spots: one pair at anterior margin and the other located on posterior transverse sulcus.

Material examined. 3 males and 4 females, Pianma, Lushui , Yunnan, August 16, 2024, coll. by Ting Luo and Yanting Qin ; 4 males and 2 females, Pianma, Lushui , Yunnan, August 16, 2024, coll. by Ting Luo and Yanting Qin ; 1 male, Langduowang, Gongshan , Yunnan, August 25, 2024, coll. by Ting Luo and Yanting Qin .

Measurements (mm). Body: ♀ 10.37–10.47; pronotum: ♀ 3.89–4.17; tegmen: ♀ 17.56–17.89; postfemur: ♀ 8.29–8.30; Ovipositor 8.30–8.91.

Distribution. Yunnan (Gongshan, Lushui).

Figures

FIGURE 1. Nigrimacula trigona Duan, Su, Shi & Chang, 2023. A–B. head and pronotum:A. dorsal view, B. lateral view; C–G, H–I. apex of abdomen: C. dorsal view, D. dorsal and apical view, E, H–I. lateral view, F. ventral and slightly apical view, G. ventral view; J. apices of ovipositor in lateral view; K. subgenital plate in ventral view; L. A–G. male; H–L. female.

FIGURE 2. The female habitus of Nigrimacula trigona Duan, Su, Shi & Chang, 2023.