Eugryllacris longifissa Bian & Shi

Bian, Xun & Shi, Fuming, 2016, Review of the genus Eugryllacris Karny, 1937 (Orthoptera: Gryllacridinae) from China, Zootaxa 4066 (4), pp. 438-450 : 443

Eugryllacris longifissa Bian & Shi sp. nov.

( Fig. 4 , Map 1)

Male. Size medium, form robust. Fastigium verticis about 2 times wider than scape, lateral margins not raised. Face smooth. Scape elongate, shorter than the length of eye; pedicel and first segment of flagellum combined about as long as length of eye. Eyes elongate and oval, protruding forwards; median ocellus nearly circular, the width as long as scape; lateral ocelli ovoid ( Fig. 4 A). Anterior margin of pronotum slightly projected in the middle, posterior margin nearly truncate, disc generally flat, 2 low callouses present on each side laterally; lateral lobes longer than high, ventral margin nearly straight ( Fig. 4 B–C); humeral sinus shallow. Hind femora with 6 inner and 7–8 outer ventral spines, which outer spines longer than inner ones; tibiae with 6 pairs of short, robust spines on dorsal surface, these becoming larger apically. Tegmina considerably surpassing apices of hind femora, reaching the middle area of hind tibiae; hind wings slightly longer than tegmina. Ninth abdominal tergite divided in the middle, forming two lobes, the apices with 1 small hook, which directing downwards and slightly inwards ( Fig. 4 E–F), its apex acute. Cerci longer, cylindrical, the basal four-fifths nearly straight, the apical area curved outwards ( Fig. 4 D). Anterior margin of subgenital plate slightly arched concave, posterior margin with 1 deep concavity, the lateral lobes narrowly rounded ( Fig. 4 F). Styli conical, shorter than the lateral lobes of subgenital plate, its apices obtuse, located on lateral margins of subgenital plate in middle area ( Fig. 4 F).

Female. Appearance of female is similar to male, except the followings: hind femora with 5 inner and 6–7 outer spines on ventral surface; tibiae with 6–7 pairs of dorsal spines. Posterior margin of seventh abdominal sternite with 1 short process, reaching the middle area of subgenital plate, its apex nearly truncate. Cerci slender, conical, the apical area directing upwards and slightly inwards. Subgential plate longer than broad, narrowing, lateral margins nearly straight, centre of posterior margin with 1 triangular concavity, the lateral lobes triangular ( Fig. 4 K). Ovipositor as long as hind femora, strongly upcurved, dorsal valvulae with apices obliquely truncate ( Fig. 4 J).

Coloration. Yellowish green. Face reddish to tawny. Dorsal surface of pronotum with 1 longitudinal yellow stripe in middle ( Figs. 4 B, H). Veins of tegmina yellowish green, cells brown. Spines of hind legs with apices black. Ovipositor brown.

Measurements (mm). BWL: ♂ 35.5–36.1, ♀ 31.9–43.0; BL: ♂ 24.4–26.0, ♀ 14.8–29.3; PL: ♂ 8.2–8.5, ♀ 8.0–8.4; TL: ♂ 25.5–27.5, ♀ 28.4–34.1; HF: ♂ 17.5–17.8, ♀ 17.0–20.3; Ov: 17.6–22.8.

Material examined. Holotype: male, Jiuwanshan, Rongshui, Guangxi, 1 August, 2006, coll. by Shi Fuming & Mao Shaoli. Paratypes: 3 males and 3 females, other data as holotype.

Distribution. China (Guangxi).

Remarks. The newly described species resembles Eugryllacris elongata Bian & Shi sp. nov. described from Zhejiang Province. The diagnostic character is on the shape of male subgenital plate and the process of female seventh abdominal sternite.

Etymology. The new specific name derived from the deep concavity of male subgenital plate.

Figures

FIGURE 4. Eugryllacris longifissa Bian & Shi sp. nov. A, G. head in frontal view; B – C, H – I. head and pronotum: B, H. dorsal view, C, I. lateral view; D – E, J. apex of abdomen: D. ventro-lateral view, E. apical and slightly ventral view, J. lateral view; F, K. subgenital plate in ventral view; A – F. male; G – K. female.