Apterolarnaca (Bianigryllacris) xinpingensis Zhang & Bian, 2023

Zhang, Qianwen, Luo, Yehong & Bian, Xun, 2023, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) XIX: New supplements to the genus Apterolarnaca Gorochov, 2004, Zootaxa 5343 (6), pp. 501-520 : 516-518

Apterolarnaca (Bianigryllacris) xinpingensis Zhang & Bian sp. nov. ṖṮflüdzḋă

Figure 15

Description. Female. Body medium. Fastigium verticis about 1.6 times as wide as scape. Face almost smooth ( Fig. 15A ). Ocelli indistinct. Pronotum with anterior margin slightly projecting, posterior margin faintly concave ( Fig. 15C ); lateral lobes longer than high, ventral margin widely rounded ( Fig. 15B ). Fore coxae swollen with 1 spine ( Fig. 15B ). Fore and middle femora unarmed on ventral surfaces, hind femora with 9–11 internal and 1–3 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 1–2 internal and 3 external 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. 15D ). Posterior margin of seventh abdominal tergite arched projecting in the middle area ( Fig. 15I ). Subgenital plate longer than wide, lateral margins faintly convex, posterior margin almost straight with a small angle in middle. Ovipositor moderately upcurved, apices narrowly rounded ( Fig. 15G ).

Male. Unknown.

Coloration. Body yellow brown. Fastigium verticis with a median black spot. Internal angles of antennal cavities with a black spot on each side. Genae with a short longitudinal black stripe below eyes. Frontuclypeal sulcus black with 1 pair of black spots ( Fig. 15A ). Dorsal surface of head with arched longitudinal black stripes which extending to semicircular at posterior margin. Margins of thoracic tergites black. Dorsal surface of body with black band. Apices of fore and middle femora black, external surface of hind femora with blackish pattern. Basal and apical areas of all tibiae with black rings, dorsal spines of hind tibiae black ( Fig. 15F ).

Material examined. Holotype: female, Ailaoshan, Xinping, June 19, 2023, coll. by Siyu Pang and Shan Li. Paratype: 1 female, the other information as holotype.

Measurements (mm). Female: BL 20.9–22.3, PL 3.8–4.1, HFL 9.3–9.9, OvL 5.5–5.8.

Distribution. Yunnan (Xinping).

Discussion. The new species differs from Apterolarnaca (Bianigryllacris) tenuispinacia Lu, Zhang & Bian, 2022 in fastigium verticis with 1 narrow longitudinal black pattern, face without black spot, genae below eyes with 1 black small spot on each side; posterior margin of female subgenital plate small and triangular projecting in middle; dorsal surface of body with a wider black band. While the latter species has the posterior margin of female subgenital plate almost straight with indistinct median concavity.

Etymology. The new species is named after the type locality.

Figures

FIGURE 15. Apterolarnaca (Bianigryllacris) xinpingensis sp. nov. Female: A. head in frontal view; B–C. head and pronotum: B. lateral view, C. dorsal view; D. second and third abdominal tergites with stridulatory pegs in lateral view; E. middle tibia in apical view; F. middle and hind legs in lateral view; G–I. apex of abdomen: G. lateral view, H. dorsal view, I. ventral view.