Homogryllacris breviprocera Duan, Su & Shi, 2024

Duan, Yanhao, Su, Jie, Cai, Fanduo & Shi, Fuming, 2024, Two new species of the genus Homogryllacris (Orthoptera: Gryllacrididae) with the first description of the female of Homogryllacris foveolis Zhang, Pang & Bian, 2023 from China, Zootaxa 5523 (2), pp. 222-230 : 223

Homogryllacris breviprocera Duan, Su & Shi sp. nov.,

Chinese name Rẋ同Bñ

( Figs. 1 , 4A–D )

Description. Body medium-sized for the genus.

Head. Face narrow ovoid; fastigium verticis slightly wider than antennal scape. Eyes ovoid, slightly protruding forward and outward; ocelli distinct, oval.

Thorax. Pronotum broad and short, anterior margin slightly protruding forward while posterior margin straight. Lateral areas of second and third abdominal tergites each with two rows of stridulatory pegs.

Wings. Wings reaching the middles of outstretched hind tibiae. Tegmen: R releases Rs before apical third of tegmen, both forked near apical area; MA fused in basal area with R; MP absent; CuA forks near mid-length of tegmen into two veins, CuA1 and CuA2; CuP undivided, free throughout; with 4 anal veins.

Legs. Fore coxa with 1 spine at fore margin. Fore and middle femora unarmed; fore and middle tibiae with 4 pairs of moveable long spines and 1 pair of short apical spurs on ventral surfaces respectively. Hind femur with 9–10 inner spines and 6–7 outer spines on ventral surface; hind tibia with 4–5 inner spines and 6–7 outer spines on dorsal surface, bearing 1 pair of dorsal apical spurs and 2 pairs of ventral apical spurs, with 1 pair of pre-apical spurs.

Coloration. Body light brown. Inner margin of antennal socket black, base and apex of scape, base of pedicel and fastigium verticis with black spots. Eyes black, ocelli light yellow. Disc of pronotum with a broad longitudinal light red stripe in the midline. Tegmen with rosy veins. Dorsal surface of abdomen light red. Apical areas of processes on male tenth abdominal tergite dark brown. Apical halves of spines and spurs on hind tibia dark brown.

Male abdomen. Ninth abdominal tergite with basal area broad, narrowing, posterior margin with a wide Vshaped incision, on both sides of the incision with a pair of short conical processes separated from each other, their apices rounded. Tenth abdominal tergite very short, the middle of posterior margin with a pair of short posterior processes, curved ventrad on the whole, basal areas crossing each other and strongly curved outwards, apical third narrowing and strongly curved inwards, sclerotized, dorsal surface flattened, apices subacute. Cerci long and thin with apices rounded. Subgenital plate broad at base, narrowing, posterior margin with a U-shaped notch in the midline, lateral lobe triangular with tip subacute. Styli cylindrical and long, apices rounded, inserted on lateral margins of subapical area of subgenital plate.

Female. Appearance is similar to that of male. Seventh abdominal sternite rectangular, basal half slightly sclerotized and terminates into a small tubercular projection, apical half membranous with transverse folds. Subgenital plate almost trapezoidal, basal area membranous with transverse folds as seventh sternite, posterior margin slightly concave. Ovipositor rather straight, much longer than hind femur, dorsal and ventral margins almost parallel, apex rounded.

Measurements (mm). Body: ♂ 20.9–21.1, ♀ 24.6; pronotum: ♂ 4.1–4.3, ♀ 4.6; tegmen: ♂ 16.9–17.6, ♀ 17.4; hind femur: ♂ 11.8–12.2, ♀ 13.4; ovipositor: 23.2.

Material examined. Holotype: ♂, Jinping, Honghe , Yunnan, 26 August, 2023, coll. Mengjia Zheng. Paratype: 1♂, same collection data as for holotype . Other specimens: 1♂ 1♀, same collection data as for holotype .

Distribution. China (Yunnan).

Etymology. The name of the new species derives from the Latin ‘ brev- ’ (short) and ‘ procer- ’ (process), referring to the morphology of the posterior process on male tenth abdominal tergite.

Discussion. With regard to the posterior processes of male tenth abdominal tergite, the new species is very similar to Homogryllacris stabilis Ingrisch, 2018 , but it differs from the latter in the following characters: posterior processes on male tenth abdominal tergite stouter and shorter; subgenital plate slightly broad at base, gradually narrowing towards tip, posterior margin with U-shaped notch in the midline, lateral lobe protruding backwards, triangular. In addition, one additional male specimen collected from the type locality with apical area of ninth abdominal tergite only contains the trace of short processes, this slight difference is regarded as individual variation.

Figures

FIGURE 1. Homogryllacris breviprocera Duan, Su & Shi sp. nov., male: A. face; B–C. head and pronotum: B. lateral view; C. dorsal view; D–H. apex of abdomen: D, E. apical view; F. dorsal view; G. lateral view; H. ventral view; female: I. seventh abdominal sternite and subgenital plate; J. ovipositor in lateral view.

FIGURE 4. Tegmina of Homogryllacris spp. in dorsal view: A–D. Homogryllacris breviprocera Duan, Su & Shi sp. nov., A–B. male; C–D. female; E–H. Homogryllacris xizangensis Duan, Su & Shi sp. nov., E–F. male; G–H. female. I–J. female: Homogryllacris foveolis Zhang, Pang & Bian, 2023. Abbreviations: lt: left tegmen; rt: right tegmen.