Apterolarnaca (Bianigryllacris) biprocera Zhang & Bian sp. nov. AEẋflüdzḋă

Figures 1–2

Description. Male. Body medium. Fastigium verticis about two times as wide as scape, projecting forwards; fastigium frontis separated from fastigium verticis by a wide suture; face conically swollen in lateral view with sparse dots (Fig. 1C). Ocelli indistinct. Pronotum with anterior margin slightly projecting, posterior margin faintly concave (Fig. 1B); lateral lobes longer than high (Fig. 1C). Fore coxae swollen with 1 spine (Fig. 1C). Fore and middle femora unarmed on ventral surfaces, hind femora with 3–8 internal and 2–5 external spines on ventral surface (Fig. 1D). Fore and middle tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs, middle tibiae with 1 internal spine on dorsal surface. Hind tibiae with 2–3 pairs of spines on dorsal surface, apices with 1 pair of dorsal spurs and 2 pairs of ventral spurs.

Second and third abdominal tergites each with two rows of stridulatory pegs (Fig. 1D). Posterior margin of eighth abdominal tergite arched in the middle area (Fig. 1G). Posterior margin of ninth abdominal tergite prolonged to ventrad, furrowed in middle area, ventral angles extended into a curved spine which S-shaped in apical view, its tip acute and curved downward and forward. Tenth abdominal tergite with 1 pair of conical processes (Fig. 1G). Subgenital plate transverse, furrowed along the midline, swollen on both sides (Fig. 1I); posterior margin heartshaped concave, the lateral lobes prolonged into digitiform lobes (Fig. 1H).

Female. Seventh abdominal sternite broad, posterior margin projecting in middle. Subgenital plate longer than wide; basal one-fifths areas of lateral margins wide, then contracted and narrowing to apex, posterior margin angular (Fig. 2H). Ovipositor short, apical half gradually upcurved; dorsal and ventral margins smooth, apices obtuse (Fig. 2G).

Coloration. Body yellow brown, darker. Fastigium verticis with transverse black stripe which suited the wide suture between fastigium frontis and fastigium verticis (Figs. 1A, 2A). The conical swelling of face black which extending into the posterior margin of pronotum, in dorsal surface of head forming a semicircular black pattern, in the disc of pronotum which widened at anterior, middle and posterior areas. Genae with black longitudinal stripes below eyes. Thoracic tergites with black margins (Figs. 1B, 2B). Apices of fore and middle femora black. Basal and apical areas of all tibiae black, and dorsal spines of hind tibiae black.

Material examined. Holotype: male, Anjiangping, Lingui, Guangxi, October 3, 2022, coll. by Xiangyi Lu, Qianwen Zhang and Huan Meng . Paratypes: 1 male, Anjiangping, Lingui, Guangxi, August 4, 2022, coll. by Siyu Pang, Pinying Rong and Huan Meng ; 1 male, Anjiangping, Lingui, Guangxi, October 2, 2022, coll. by Xiangyi Lu, Qianwen Zhang and Huan Meng ; 1 female, Anjiangping, Lingui, Guangxi, July 13, 2022, coll. by Xiangyi Lu, Qianwen Zhang and Huan Meng ; 1 female, Anjiangping, Lingui, Guangxi, August 6, 2022, coll. by Xiangyi Lu, Qianwen Zhang and Huan Meng ; 1 female, Anjiangping, Lingui, Guangxi, October 2, 2022, coll. by Xiangyi Lu, Qianwen Zhang and Huan Meng .

Measurements (mm). Male: BL18.2–19.3, PL 3.6–4.3, HFL 8.2–8.6; Female: BL 19.0–20.4, PL 4.1–4.4, HFL 8.4–8.9, OvL 5.9–6.3.

Distribution. Guangxi (Lingui).

Discussion. The new species differs from Apterolarnaca (Bianigryllacris) parvospinus (Liu & Yin, 2002) by the apical area of spines of male tenth abdominal tortile (Fig. 1E–F, H–J), its apices directing downward and forward, tenth abdominal tergite with 1 pair of conical processes (Fig. 1G), female subgenital plate longer than wide with posterior margin narrowly rounded (Fig. 2H).

Etymology. The new species drives from Latin bi and procer referring to the tenth abdominal tergite with 1 pair of conical processes.