Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) XIX: New supplements to the genus Apterolarnaca Gorochov, 2004 Author Zhang, Qianwen 0000-0001-6856-840X Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541006, China. & Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin 541006, China. & Zhangqianwen 33 @ 163. com; https: // orcid. org / 0000 - 0001 - 6856 - 840 X Author Luo, Yehong Guangxi Huaping National Nature Reserve Management Office, Guilin 541000, Guangxi, China; Author Bian, Xun Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541006, China. & Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin 541006, China. text Zootaxa 2023 2023-09-13 5343 6 501 520 https://www.mapress.com/zt/article/download/zootaxa.5343.6.1/51846 journal article 10.11646/zootaxa.5343.6.1 1175-5326 8345886 E526459C-094A-4CA7-AE1B-3DF44F64C09E 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 ). FIGURE 1. Apterolarnaca ( Bianigryllacris ) biprocera sp. nov. Male: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites in lateral view; F. hind leg in external view; E, G–J. apex of abdomen: E. lateral view, G . dorsal view, H. apical view, I. apical and slightly ventral view, J. ventral view. 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 . FIGURE 2. Apterolarnaca ( Bianigryllacris ) biprocera sp. nov. Female: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites in lateral view; E. hind leg in external view; F–H. apex of abdomen: F. dorsal view, G. lateral view, H. ventral view. 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.