Xizicus (Axizicus) furcus Cui, Liu & Shi, 2020

Cui, Peng, Liu, Qing & Shi, Fuming, 2020, Two new species of the genus Xizicus Gorochov, 1993 (Tettigoniidae: Meconematinae: Meconematini) from Gaoligongshan, Yunnan, China, Zootaxa 4748 (1), pp. 44-50 : 44-50

1. Xizicus (Axizicus) furcus Cui, Liu & Shi sp. nov.

( Fig. 1 )

Description. Male. Body small-sized. Fastigium verticis conical, obtusely rounded apically, with a longitudinal sulcus. Eyes hemispherical and protruding forward. Apical segment of maxillary palpi slightly longer than subapical one, apex feebly swollen.

Anterior margin of pronotum comparatively straight, posterior margin obtusely rounded ( Fig. 1A ); lateral lobes with height nearly equal to length, humeral sinus shallow ( Fig. 1B ). Thoracic auditory spiracle exposed, ovoid ( Fig. 1B ). Tegmina extending beyond apices of metafemora remarkably; hind wings slightly longer than tegmina. Procoxae with a spine; tibial tympana open on both sides. Protibiae with 6 outer and 5 inner spines on ventral surface. Mesotibiae with 6 outer and 5 inner spines on ventral surface. Metatibiae with 22–29 outer and inner spines on dorsal surface as well as 1 pair of dorsal apical spurs and 2 pairs of ventral apical spurs.

The center of posterior margin of tenth abdominal tergite concave and near area thin ( Fig. 1 C–D). Cercus with basal half stout, apical half slender and elongate, apex bluntly rounded; internal margin near middle area with an inner process thin and elongate, curved ventrad and apex subacute ( Fig. 1 C–E). Subgenital plate with proximal area slightly broad and distal area narrow, and with a longitudinal groove; posterior margin with a concavity ( Fig. 1G ). Styli comparatively short, conical and apices bluntly rounded on apices of lateral margins of subgenital plate.

Colouration. Body greenish. Pronotal disc with a pair of blackish brown longitudinal stripes ( Fig. 1A ). Metafemoral genicular lobes with a black spot on inner and outer sides separately, and spines of metatibiae on dorsal surface blackish brown.

Female. Appearance is similar to male. Ninth abdominal tergite with lateral areas extended triangularly backwards. Tenth abdominal tergite split longitudinally. Epiproct nearly circular. Cercus conical and apex thin and acute. Subgenital plate nearly trapezoid, with basal half wider and lateral margins near the middle slightly curved dorsad, apical half tapering, and with one conspicuous transverse ridge in the middle, and posterior margin feebly concave ( Fig. 1I ). Ovipositor slightly straight, basal area stout; dorsal valvulae with apices acute and ventral ones with apices hook-shaped ( Fig. 1H ).

Material examined. Holotype: ♂, Gaoligongshan, Baoshan , Yunnan, Alt. 1800m, N. 25.3023º, E. 98.7952º, 20 September, 2019, coll. Peng Cui. Paratype: 1♀, other data same to the holotype.

Measurements (mm). Body: ♂ 12.3, ♀ 14.1; pronotum: ♂ 4.2, ♀ 4.3; tegmina: ♂ 23.1, ♀ 25.2; metafemora: ♂ 10.9, ♀ 12.1; ovipositor: 12.1.

Distribution. China (Yunnan).

Discussion. The new species resembles Xizicus (Axizicus) falcata Chang, Du & Shi, 2013 , but differs from the latter in male cercus with apical half slender and long, and internal margin near middle area with an inner process thin and elongate, curved ventrad, and in female subgenital plate with one conspicuous transverse ridge in the middle area.

The new species is similar to Xizicus (Eoxizicus) uncicercus Mao & Shi, 2015 and Xizicus (Eoxizicus) dischidus Di, Han & Shi, 2015 , but can be distinguished from them in male cerci with a long inner process and posterior margin of tenth abdominal tergite without process.

Etymology. The name of the new species is derived from the morphology of male cercus. Latin “ furca ” means bifurcate, indicating the bifurcate shape of cercus.

Figures

FIGURE 1. Xizicus (Axizicus) furcus Cui, Liu & Shi sp. nov., male: A–B. head and pronotum:A. dorsal view; B. lateral view; C–G. apex of abdomen: C, E. dorsal view; D. dorso-apical view; F. ventro-lateral view; G. ventral view; female: H. ovipositor in lateral view; I. subgenital plate in ventral view.