Xiphidiopsis (Xiphidiopsis) trifoliata, 2019

Wang, Tao, Chen, Powei & Shi, Fuming, 2019, Two new species of the tribe Meconematini (Orthoptera: Tettigoniidae: Meconematinae) from Taiwan, Zootaxa 4564 (1), pp. 295-300 : 297

Xiphidiopsis (Xiphidiopsis) trifoliata sp. nov. ( Fig. 2 )

Description. Male. Body small, medium size for the tribe Meconematini . Fastigium verticis conical, narrower than antennal scape, broadly blunt apically, with a small sulcus on dorsal surface. Eyes oval and distinctly protruding forward. Apical segment of maxillary palpus feebly longer than subapical one, slightly swelled apically.

Anterior margin of pronotum straight, posterior margin obtusely rounded ( Fig. 2A ); lateral lobe higher than long, posterior margin undulating and oblique, humeral sinus shallow ( Fig. 2B ).

Tegmina narrow and long, surpassing apices of hind femora; hind wings distinctly extending behind tegmina.

All femora without spines on ventral surface, genicular lobes blunt apically. Fore coxae with a small spine; fore tibiae with 5 inner and 6 outer spines on ventral surface; tympanal organs open on both sides, ovoid. Middle tibiae with 5–6 spines respectively on both sides of ventral surface. Hind tibiae with 26–30 on both dorsal sides as well as two pairs of ventral apical spurs and one pair of dorsal apical spurs.

10th abdominal tergite with a distinct notch on posterior margin, in the middle bearing a robust asymmetric posterior process which bent downwards, apical half slightly extended, posterior margin blunted ( Fig. 2F ); left lateral margin near middle area with a spine-shaped process, terminal obtusely rounded ( Fig. 2D ); cercus robust at base, feebly compressed; 2/3 basal area bent inner-dorsally distinctly ( Fig. 2E ), 1/3 apical area cylindrical, curved dorsad, apical area extending bilaterally, forming three lobes ( Fig. 2G ). Subgenital plate slightly trapezoidal, basal area broad, apical area concave dorsally, posterior margin narrowly rounded ( Fig. 2H ). Subapex of subgenital plate with stout, compressed styli on lateral margins.

Coloration. Body yellowish brown, probably green when alive. Eyes brown. All third tarsi and genicular lobes of all femora with apices black. Spines of fore and middle tibiae black brown on ventral surface while spines of hind tibiae with apices black brown.

Female. Unknown.

Material examined. Holotype: male, Taidong, Taiwan, 22 July, 2016, coll. Tien Hsieh. Paratype: 1♂, the other data as holotype.

Measurements(mm). Body: ♂ 10–10.3; pronotum: ♂ 3.8; tegmina: ♂ 16.3–18.2; hind femora: ♂ 9.6–10.

Discussion. This new species differs from known species of Xiphidiopsis in: 10th abdominal tergite of male with a robust asymmetric posterior process; basal area of cercus slightly compressed, 2/3 basal area bent inner-dorsally distinctly, 1/3 apical area curved dorsad, apical area extending bilaterally, forming three lobes.

Etymology. The name of the new species is derived from apex of male cercus divided into three lobes. Latin “ tri- ” means three, and Latin “ foli ” means foliar.

Figures

FIGURE 2. Xiphidiopsis (Xiphidiopsis) trifoliata sp. nov., male: A–B. pronotum: A. dorsal view; B. lateral view; C–F, I apex of abdomen: C. lateral view; D. apico-lateral view; E. ventral view; F. apical view; I. latero-ventral view; G. apical area of left cercus in lateral-anterior view; H. subgenital plate in ventral view.