Glolarnaca nigrimacula, Yang & Lu & Bian, 2021

Yang, Zizhon, Lu, Xiangyi & Bian, Xun, 2021, Contribution to the Glolarnaca Gorochov, 2008 (Orthoptera: Gryllacrididae: Hyperbaeninae) from China, Zootaxa 5048 (1), pp. 127-134 : 130-132

Glolarnaca nigrimacula sp. nov.

-×球蟋•

Figures 4–6 , 7D

Description. Body slender. Face ovoid, with impressed dots; fastigium verticis about 2.9 times as wide as scape ( Fig. 4A–B ). Ocelli indistinct. Eyes small.

Anterior margin of pronotum straight, posterior margin widely arched; lateral lobes longer than high, posterior margin oblique without humeral sinus, anterior angle roundly angular, posterior angle arched, ventral margins undulated ( Fig. 4C ).

Fore coxae with one spine. Fore and middle unarmed on ventral surfaces; hind femora with 5–6 internal and 11 external spines on ventral surface, the external spines obviously larger than the internal ones. Fore and middle tibiae with four pairs of spines and a pair of spurs on ventral surfaces; hind tibiae slightly curved with 5–6 internal and 5 external spines on dorsal surface, apices with 3 pairs of spurs.

Wings reaching the middle area of eighth abdominal tergite ( Fig. 6 ). Tegmen ( Fig. 5 ): Radius forked two branches in two thirds area; MA, CuA and CuP undivided, free throughout; with 4 anal veins.

Abdominal stridulatory pegs unobvious ( Fig. 4E ). Eighth abdominal tergite prolonged. Ninth abdominal tergite globularly projected and curved downwards, in apical area with medial furrow, the lateral margin with a pair of processes, its apices connected each other and subacute ( Fig. 4H–J ). Tenth abdominal tergite with 1 pair of tuberculate processes in the middle ( Fig. 4H, I ). Cerci slender, conical. Subgenital plate wider than long, lateral margins slightly narrowing to apex, posterior margin with a median concavity. Styli inserted at the apical area of lateral lobes of subgenital plate.

Female. Unknown.

Coloration. Body brown, face with 3 pairs of black spots, of which 2 at clypeo-frontal suture, 2 at front area, the other 2 between antennal sockets ( Fig. 4A ). Internal margins of antennal sockets black, the ventral margin extending to face forming 2 black spots ( Fig. 4A ). Internal margin of scape and pedicel black. Fastigium verticis with 3 black spots, dorsum of head with 1 narrow longitudinal band in midline. Eyes black. Gena with black band which extending to dorsal area of head. Pronotum light brown with black spots as Fig. 4C . Internal and external margins of all femora with dark brown bands, which extending the apical area of femora. Basal and apical area of tibiae with black ring, the apical area slightly lighter. Tegmina brown. All abdominal tergites black brown. Apices of hooks on male ninth abdominal tergite black.

Measurements (mm). BL: ♂ 17.8; PL: ♂ 4.2; TL: ♂ 13.2; HFL: ♂ 7.7.

Material examined. Holotype: male, Gulinjing, Maguan, Yunnan, 30 July 2021, coll. by Xiangjin Liu ; GXNU.

Distribution. Yunnan (Maguan, Lvchun).

Discussion. The new species differs from congeneric species in: body slender and black brown; posterior margin of pronotum without black strand, the lateral lobes of pronotum with large black spots; median concavity of posterior margin of male subgenital plate narrower and shallower than Glolarnaca kunyui sp. nov., but deeper than Glolarnaca hainanica and Glolarnaca sinica ( Fig. 7 ). In Field guide to common insects of Huanglian Mountain ( Li et al., 2018), the ecological photo in 41p also displayed the new species.

Etymology. The new species is named for the color of head and pronotum with large black spots; from Latin nigr and macul.

Figures

FIGURE 4. Glolarnaca nigrimacula sp. nov. Male: A–B. head: A. frontal view, B. frontal and dorsal view; C–D. head and pronotum: C. dorsal view, D. lateral view; E. stridulatory pegs on second and third abdominal tergites; F–H. apex of abdomen: F. dorsal view, G. lateral view, H. apical view, I. apico-ventral view, J. ventral view.

FIGURE 5. Main veins of tegmina of Glolarnaca nigrimacula sp. nov. Male: A, C. left tegmen; B, D. right tegmen.

FIGURE 6. Male habitus in lateral view of Glolarnaca nigrimacula sp. nov..

FIGURE 7. Male subgenital plate of Glolarnaca spp. in ventral view. A. Glolarnaca sinica (Li, Liu & Li, 2016); B. Glolarnaca hainanica (Li, Liu & Li, 2016); C. Glolarnaca kunyui sp. nov.; D. Glolarnaca nigrimacula sp. nov..