Eugryllacris forficata, Pang & Zhang & Bian, 2023

Pang, Siyu, Zhang, Qianwen & Bian, Xun, 2023, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera: Ensifera: Stenopelmatoidea) XXII: New descriptions from Southwest China, Zootaxa 5374 (4), pp. 487-504 : 492-494

Eugryllacris forficata sp. nov.

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Figures 4–5

Description. Male. Body large. Face ovoid; fastigium verticis about twice as wide as scape; fastigium frontis separated from fastigium verticis by a very fine suture ( Fig. 4A ). Ocelli distinct.

Anterior margin of pronotum projecting in middle, posterior margin faintly concave ( Fig. 4B ); lateral lobes longer than high, anterior angle arched, posterior angle rounded angular, humeral sinus indistinct ( Fig. 4C ).

Wings slightly surpassing the hind femora. Fore coxae with 1 small spine. Fore and middle femora unarmed; hind femora with 5–6 internal and 6–8 external spines. Fore and middle tibiae with 4 pairs of spurs and 1 pair of apical spurs on ventral surfaces. Hind tibiae dorsally with 5 internal spines, 6 external spines and 1 pair of apical spurs, ventral surface with 1 pair of subapical spurs and 2 pairs of apical spurs.

Second and third abdominal tergites with few, very minute stridulatory pegs ( Fig. 4D ). Eighth abdominal tergite prolonged. Ninth abdominal tergite semi-globular: prolonged and down-curved; apical half furrowed in midline, at end of furrow split and on both sides of split area with an obtuse bump and below bump with a small compressed process faintly pointing ventrad ( Fig. 4G–I ). Subgenital plate almost twice as wide as long; posterior margin widely rounded with bilobate projection in middle ( Fig. 4H ); styli inserted laterally at posterior margin.

Female. Seventh abdominal sternite wider than long, ventral surface nearly triangularly convex, the lateral margins obliquely narrowing, the apical third constricted and terminating into a short process reaching the basal third area of subgenital plate, apex of the process obtuse ( Fig. 5G ). Subgenital plate transverse; basal area with fine transverse riffles, the lateral margins convex and terminating into middle area; lateral margins of middle area constricted; apical half with lateral margins subparallel, posterior margin with median concavity, the lateral lobes obtuse ( Fig. 5G ). Ovipositor upcurved, especially in subbasal area, margins slightly and gradually narrowing towards apices; with apical widening; apices subacute ( Fig. 5E ).

Coloration. Body green. Wings brown with black cells. Eyes brown. Ocelli pale yellow. Ventral spines of hind femora black. Ovipositor brown.

Measurements (mm). Male: BL 26.06–28.46, PL 6.25–6.80, TL 22.30–22.89, HFL 14.44–15.11; Female: BL 33.95, PL 7.13, TL 26.16, HFL 15.62, OvL 19.92.

Material examined. Holotype: male, Xima, Yingjiang , Yunnan, July 16, 2023, coll. by Weizong Yang . Paratypes: 1 male, Xima, Yingjiang, Yunnan, August 26, 2023, coll. by Weizong Yang ; 1 female, Xima, Yingjiang , Yunnan, July 13, 2023, coll. by Weizong Yang .

Distribution. Yunnan (Yingjiang).

Discussion. The new species differs from other species of Eugryllacris by the middle area of male subgenital plate projecting ( Fig. 4H ) with median concavity and the lateral lobes triangular ( Fig. 4I ) instead of nearly widely V-shaped concave; the process of female seventh abdominal sternite with short apical area and its apex without median concavity ( Fig. 5F, G ).

Etymology. The new species is named for the male subgenital plate with bifurcated posterior margin.

Figures

FIGURE 4. Eugryllacris forficata sp. nov. Male: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites in lateral view; E–I. apex of abdomen: E. lateral view, F. dorsal view, G. apical view, H. ventral view, I. ventro-apical view.

FIGURE 5. Eugryllacris forficata sp. nov. Female: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites in lateral view; E–I. apex of abdomen: E. lateral view, F. ventral view; G. seventh abdominal sternite and subgenital plate in ventral view.