Apterolarnaca (Bianigryllacris) sicula 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 : 513

Apterolarnaca (Bianigryllacris) sicula Zhang & Bian sp. nov. ńŵflüdzḋă

Figure 12

Description. Female. Fastigium verticis about two times as wide as scape. Face with scattered impressed dots ( Fig. 12A ). Ocelli indistinct. Pronotum with anterior and posterior margins truncate ( Fig. 12B ); lateral lobes longer than high, anterior angle widely rounded, posterior angle angular ( Fig. 12C ). Fore coxae swollen with 1 spine ( Fig. 12B ). Fore and middle femora unarmed on ventral surfaces, hind femora with 1 internal and 4 external spines on ventral surface. Fore tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs; middle tibiae ventrally with 3 pairs of spurs and 1 pair of apical spurs, dorsal surface with 1 internal spine. Hind tibiae arched with 2 internal and 5 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. 12D ). Seventh abdominal sternite normal. Subgenital plate slightly wider than long, lateral margins narrowing to apex which slightly convex in middle, posterior margin narrowly angular ( Fig. 12G ). Ovipositor short, apices narrowly rounded ( Fig. 12F ).

Male. Unknown.

Coloration. Body yellowish brown. Fastigium verticis with transverse black stripe between antennal cavities which short extending to dorsal surface of head along the middle area ( Fig. 12A ). Internal margins of antennal cavities black ( Fig. 12A ). Genae with longitudinal black stripe below eyes. Dorsal surface of head with semicircular black pattern, behind eyes with a short longitudinal black stripe on each side ( Fig. 12B ). Abdominal tergites with narrow black margins, dorsal surface of abdomen with a wide longitudinal black band. Apices of all femora black. Basal and apical areas of all tibiae with black rings, dorsal spines of hind tibiae black ( Fig. 12E ).

Material examined. Holotype: female, Yangmeiao, Jiuwanshan , Guangxi, August 5, 2021, coll. by Xiaoyu Peng.

Measurements (mm). Female: BL 20.5, PL 3.6, HFL 9.0, OvL 5.0.

Distribution. Guangxi (Jiuwanshan).

Discussion. Lu et al. (2022) thought the specimen from Jiuwanshan, Guangxi was Apterolarnaca (Bianigryllacris) fallax (Liu & Bi, 2008) . However, after examining the morphological graphs of type specimens of Apterolarnaca (Bianigryllacris) fallax (Liu & Bi, 2008) , we thought the former was a new undescribed species. The new species differs from the latter by the posterior margin of female subgenital plate widely triangular in ventral view with a small angular in the middle instead of widely rounded ( Fig. 12G ). The morphological illustrations have been provided by Lu et al. (2022) in Fig. 5 .

Etymology. The new species name drives from the posterior margin of female subgenital plate with a small angular.

Figures

FIGURE 5. Apterolarnaca (Bianigryllacris) fallax. Male housed in the National Animal Collection Resource Center (http://museum.ioz.ac.cn): A–D. habitus: A, D. dorsal view, B. lateral view, C. ventral view; E. subgenital plate in ventral view.

FIGURE 12. Apterolarnaca (Bianigryllacris) sicula sp. nov. Female from Lu et al. (2022) in Fig. 5: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites with stridulatory pegs in lateral view; E. left hind leg in external view; F–G. apex of abdomen: F. lateral view, G. ventral view.