Homogryllacris xishanensis, Zhang & Liu & Bian, 2023

Zhang, Qianwen, Liu, Mingyu & Bian, Xun, 2023, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) XVII: New reports on Chinese Homogryllacris, Zootaxa 5330 (2), pp. 295-300 : 298-299

Homogryllacris xishanensis sp. nov. δψÑḆẽ

Figure 3

Diagnosis. This new species differs from Homogryllacris brevipenna Du, Bian & Shi, 2016 by margins of pronotum darker, disc with 1 pair of black spots ( Fig. 3C ); posterior margin of male subgenital plate with wider and shallower median concavity ( Fig. 3L ), the lateral lobes small and triangular with external margin short, faintly concave ( Fig. 3H ). While the latter species has the median concavity of subgenital plate deeper and narrower, the lateral lobes triangular, apices acute ( Du et al., 2016: Fig. 2E, G ). It differs from Homogryllacris biloba (Bey-Bienko, 1957) by the black color patterns of pronotum and the shape of male subgenital plate.

Description. Male. Body medium-sized. Face with scattered impressed dots ( Fig. 3A ). Fastigium verticis wider than scape. Fastigium frontis separated from fastigium verticis by a very fine suture ( Fig. 3A ). Ocelli distinct.

Pronotum projected slightly in the median area of anterior margin, posterior margin nearly straight ( Fig. 3C ); lateral lobes longer than high ( Fig. 3B ).

Fore coxae with 1 spine. Fore and middle femora unarmed on ventral surfaces; hind femora with 5–6 internal and 3–6 external spines on ventral surface. Fore and middle tibiae with 5 pairs of ventral spurs, including 1 pair of apical ones, middle tibiae with 1 internal spine on dorsal surface ( Fig. 3E ); hind tibiae with 4 internal and 6–7 external spines on dorsal surface, apices with 1 pair of dorsal spurs, 1 pair of subapical ventral spurs and 2 pairs of ventral spurs.

Tegmina reduced, extending only to the middle area of metanotum ( Fig. 3D ). Second and third abdominal tergites each with 2 rows of stridulatory pegs ( Fig. 3F ). Eighth abdominal tergite slightly prolonged. Ninth abdominal tergite prolonged backward and ventrad, triangular in dorsal view, posterior margin with large concavity ( Fig. 3G ). Tenth abdominal tergite with 1 pair of depressed processes, crossing each other in basal area, the other parts arched curved ventrad; apical areas sclerotized, apices acute, its directing forward ( Fig. 3G, H ). Subgenital plate longer than wide, basal margin nearly straight, the lateral margins subparallel, posterior margin with 1 large median concavity, the lateral lobes small and triangular with the internal margin obliquely straight and the external margin shorter and arched ( Fig. 3L ). Styli incurved, inserted at apico-lateral angles of subgenital plate ( Fig. 3L ).

Female. Unknown.

Coloration. Body yellowish brown. Antennal cavities with black margins ( Fig. 3A ). Fronto-clypeal suture with 1 pair of black spots ( Fig. 3A ). Fastigium frontis with 1 pair of circular black spots, fastigium verticis with 1 transversal black stripe ( Fig. 3A ). Dorsal surface of head with three black spots, forming semicircular. Pronotum with black margins, disc with 1 pair of oblique stripes ( Fig. 3C ). Dorsal surface of mesonotum, metanotum and abdomen black. Apical areas of femora and tibiae reddish brown ( Fig. 3E ). Tegmina brown ( Fig. 3D ).

Measurements (mm). Male (holotype): BL 16.94, PL 3.60, TL 3.01, HFL 8.9.

Material examined. Holotype: male, Xishan, Kunming , Yunnan, June 4, 2023, coll. by Mingyu Liu.

Distribution. Yunnan (Kunming).

Etymology. Named after the type locality.

Figures

FIGURE 2. Homogryllacris biloba (Bey-Bienko, 1957). Female: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. tegmen in lateral view; E. middle tibia in dorsal view; F. apex of abdomen in dorsal view; G. second and third abdominal tergites in lateral view; H. apex of abdomen in ventral view; I. apex of abdomen in lateral view; J. apices of ovipositor in lateral view.

FIGURE 3. Homogryllacris xishanensis sp. nov. Male: A. head in frontal view; B–C. head and pronotum: B. lateral view, C. dorsal view; D. tegmen in lateral view; E. middle and hind tibiae in lateral view; F. second and third abdominal tergites in lateral view; G–K. apex of abdomen: G. dorsal view, H. apico-ventral view, I. apical view, J. lateral view, K. apico-lateral view; L. subgenital plate in ventral view.