Apterolarnaca (Bianigryllacris) xinganensis Lu & Zhang & Bian 2022, sp. nov.
Creators: name: Lu, Xiangyi
name: Zhang, Qianwen
name: Bian, Xun
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllacrididae
Apterolarnaca
Apterolarnaca xinganensis

description: Apterolarnaca (Bianigryllacris) xinganensis sp. nov.
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Figures 9–12
Description. Male. Body medium. Fastigium verticis wider than scape. Face with sparse punctures (Fig. 9A). Ocelli indistinct.
Pronotum with anterior margin slightly projecting, posterior margin faintly concave (Fig. 9B); lateral lobes longer than high, anterior angle rounded, posterior angle widely rounded (Fig. 9C).
Fore coxae swollen with 1 spine (Fig. 9C). Fore and middle femora unarmed on ventral surfaces, hind femora with 7–10 internal and 2–5 external spines on ventral surface. 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 3–4 internal and 4–6 external spines on dorsal surface, apices with 1 pair of dorsal spurs and 2 pairs of ventral spurs.
Second and third abdominal tergite each with two rows of stridulatory pegs (Fig. 9D). Posterior margin of eighth abdominal tergite arched projected in the middle area (Fig. 9G). Posterior margin of ninth abdominal tergite split along the middle, the lateral lobes curved downward and terminating into a spine (Fig. 9H–I). Tenth abdominal tergite interrupted in the middle. Cerci short, conical, its apices obtuse. Basal margin of subgenital plate almost straight, posterior margin with 1 median concavity (Fig. 9H–I), the lateral margins terminating into 1 short and stout process on both sides; without styli.
Female. Subgenital plate wider than long, posterior margin widely arched with middle area slightly projected (Fig. 10G). Ovipositor short, apical half gradually upcurved; dorsal and ventral margins smooth, apices obtuse (Fig. 10E).
Coloration. Body brownish yellow with blackish marks. Fastigium verticis, internal margins of antennal cavities and scape, flagellar segment and dorsal surface of head with blackish spots (Figs. 9A, 10A). Eyes black. Margins of pronotum blackish (Figs. 9B, 10B). Basal and apical areas of all tibiae with black rings. Spines of hind legs black.
Material examined. Holotype: male, Mao'ershan, Guangxi, October 5, 2021, coll. by Qianwen Zhang. Paratypes: 2 males and 1 female, Mao'ershan, Guangxi, October 5, 2021, coll. by Xiangyi Lu; 1 female, the other information as holotype. Other specimens: 1 male, Mao'ershan, Guangxi, October 5, 2021, coll. by Jing Liu; 1 male, Mao'ershan, Guangxi, October 2, 2021, coll. by Xiangyi Lu.
Measurements (mm). Male: BL 16.2–16.4, PL 3.7–4.1, HFL 8.1–8.6; Female: BL 19.9–20.1, PL 4.1–5.1, HFL 8.8–9.3, OvL 7.1–7.3.
Distribution. Guangxi (Mao'ershan).
Discussion. The new species differs from Apterolarnaca (Bianigryllacris) trilobus (Bian & Shi, 2014) in: dorsal surface of abdomen without black band along the midline (Fig. 12), apices of lateral lobes of male subgenital plate large (Fig. 9H), female subgenital plate wider than long (Fig. 10G). It differs from Apterolarnaca (Apterolarnaca) truncatoloba (Li & Liu, 2015) (Figs. 1–4) in: lateral lobes of male ninth abdominal tergite terminating into a pair of spines, posterior margin of male subgenital plate without median lobes, posterior margin of female subgenital plate slightly projected in the middle instead of truncate (Fig. 10G).
Etymology. The new species is named after the type locality.
description: Published as part of Lu, Xiangyi, Zhang, Qianwen & Bian, Xun, 2022, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) VII: Review the genus Apterolarnaca Gorochov, 2004, pp. 381-396 in Zootaxa 5115 (3) on pages 391-396, DOI: 10.11646/zootaxa.5115.3.4, http://zenodo.org/record/6358418