Allicyrtaspis sulcata, Chen & Wang & Shi, 2022

Chen, Chun, Wang, Haijian & Shi, Fuming, 2022, One new species of the genus Allicyrtaspis (Orthoptera: Tettigoniidae: Meconematinae) from Sichuan, China, Zootaxa 5124 (4), pp. 493-495 : 493-495

Allicyrtaspis sulcata sp. nov.

Chinese name Ḏ沟异Ḣễ

( Fig. 1 )

Description. Male. Body small, robust. Head hypognathous and stout. Fastigium of vertex conical and protruding forwards, with a longitudinal sulcus on dorsum, apex obtusely rounded. Eyes ovoid, obviously protruding forwards and outwards. Apical segment of maxillary palpus slightly longer than subapical one, apex swollen. Pronotum slightly elongate backwards, anterior margin roughly straight, metazona flat and posterior margin obtusely rounded; lateral lobe longer than high, posterior area narrowing, humeral sinus absent. Procoxa with 1 spine. All femora unarmed on ventral surfaces. Protibia with 4 or 5 spines on inner and outer sides of ventral surface respectively; tibial tympana oval, open on both sides. Mesotibia with 5 pairs of spines on ventral surface. Genicular lobes of postfemur with apices obtuse on both sides; posttibia with 15–19 spines on both sides of dorsal surface separately, apex with 1 pair of dorsal apical spurs and 2 pairs of ventral apical spurs. Tegmen short, reaching middle area of first abdominal tergite, apex rounded. Hind wing absent.

Ninth abdominal tergite with lateral area protruding backwards, apex rounded. Tenth abdominal tergite distinctly extending posteriorly, basal half broad and bulged, with a thin longitudinal furrow in the midline, lateral lobe with apex rounded; apical half strongly narrow and rectangular, which curved downwards, with a longitudinal and deep furrow on dorsal surface, posterior margin thick. Cercus very short, basal area stout, apical area strongly curved inwards and upwards, apex subacute. Subgenital plate nearly rectangular, longer than wide, lateral area folded dorsad separately on both sides, with a median longitudinal carina, basal margin with a small and rather deep triangular notch while posterior margin slightly concave. Style short, cylindrical, apex rounded, inserted on subapical area of lateral margin of subgenital plate. Concealed genitalia sclerotized, nearly rectangular, the middle of posterior margin slightly protruding backwards and slightly surpassing posterior margin of subgenital plate.

Female. Appearance is similar to male with following exceptions: Tegmen squamiform. Tenth abdominal tergite shorter, posterior margin nearly straight or spilt in some specimens. Epiproct shield-shaped, slightly concave in the center of dorsal surface. Cercus long conical, slightly curved dorsally and apex rounded. Ovipositor broad and short, moderately upcurved, with smooth margins; apex of dorsal valve subacute and indistinctly hook-shaped at apex of ventral valve. Subgenital plate bulged ventrad, widened at basal area, with conspicuous arcuate groove; after subbasal area strongly constricted, posterior margin slightly concave.

Coloration. Body yellowish brown (probably light green when alive). Eyes brown. Dorsal surface of head light brown except fastigium of vertex. A longitudinal short and light yellow stripe after eyes separately. Disc of pronotum with a pair of longitudinal and almost parallel yellow stripes. Apex of claw black. Apex of male cercus brown. Apical area of ovipositor green.

Material examined. Holotype: ♂, Daxiangling, Yingjing, Sichuan, China, 6 August, 2020, coll. Haijian Wang and Ziqiang Xu. Paratypes: 1♂ 6♀, same collection data as holotype .

Measurement (mm). Body: ♂ 8.8–10.1, ♀ 9.0–11.1; pronotum: ♂ 2.7–2.9, ♀ 2.9–3.3; tegmen: ♂ 0.7–0.8, ♀ 0.4–0.8; postfemur: ♂ 6.8–8.5, ♀ 8.3–9.3; ovipositor: 5.5–6.8.

Distribution. China (Sichuan).

Etymology. The species is named after apical half morphology of male tenth abdominal tergite, Latin sulc - means furrow.

Discussion. This new species can be distinguished from the known species of this genus by the morphology of male tenth abdominal tergite: basal half bulged; apical half narrow, nearly rectangular, with a very obvious furrow on dorsal surface, almost vertically bent downwards.

Figures

FIGURE 1 Allicyrtaspis sulcata sp. nov., male: A–B. head and pronotum: A. dorsal view; B. lateral view; C–F. apex of abdomen: C. apico-lateral view; D. dorsal view; E. lateral view; F. ventral view; female: G–I. apex of abdomen: G. dorsal view; H. ovipositor in lateral view; I. subgenital plate in ventral view.