Xiphidiopsis (Dinoxiphidiopsis) bifurcatis, Cui & Liu & Chang, 2020

Cui, Peng, Liu, Qing & Chang, Yanlin, 2020, Two new species of the genus Xiphidiopsis Redtenbacher, 1891 (Tettigoniidae Meconematinae: Meconematini) from Yunnan, China, Zootaxa 4845 (1), pp. 127-132 : 127-129

1. Xiphidiopsis (Dinoxiphidiopsis) bifurcatis sp. nov.

( Fig. 1 )

Description. Male. Body small. Fastigium verticis conical, apex rounded, with a thin longitudinal sulcus. Eyes oval. Apical segment of maxillary palpi slightly longer than subapical one, apex slightly swollen.

Pronotum with anterior margin comparatively straight, posterior margin obtusely rounded ( Fig. 1A ); lateral lobes longer than deep and humeral sinus shallow ( Fig. 1B ). Thoracic auditory spiracle exposed, ovoid ( Fig. 1B ). Tegmina long, with anterior and posterior margins nearly parallel, apices bluntly rounded and extending beyond apices of metafemora; hind wings slightly longer than tegmina. Procoxa with a spine; protibia with 4 long and 2 short apical spines of outer side and 4 long and 1 short apical spines of inner side on ventral surface; tibial tympana open on both sides. Mesotibia with 4 long and 2 short apical spines of outer side and 3 long and 2 short apical spines of inner side on ventral surface. Metatibia with 26–32 outer and inner spines on dorsal surface respectively, as well as 1 pair of dorsal apical spurs and 2 pairs of ventral apical spurs.

Median process of tenth abdominal tergite symmetrical, pointing slightly upward and posteriorly, basal half feebly stout and longitudinally concave on ventral surface, apical half about cylindrical and slightly thin, with apex bluntly rounded ( Fig. 1 C–D). Both cerci symmetric, base with a circular lobe of inner side on ventral surface; apical half compressed and longitudinally concave on inner side; apical half divided into 2 branches, dorsal branch lamellar, curved interiorly and shorter than ventral one, and ventral one finger-like, slightly narrower, with apex subacute and curved interiorly ( Fig. 1 D–E). Subgenital plate nearly rectangular, with basal half slightly broad and apical half narrower, two thirds base slightly longitudinally concave, lateral margins feebly folded dorsad, apex widely rounded, and styli thin and long on lateral margins of subapical area on ventral surface. Genitalia completely membranous.

Colouration. Body greenish. Genicular lobules of metafemur with a black spot on inner and outer sides respectively. Apical area of tegminal stridulatory field light brown.

Female. Unkonwn.

Material examined. Holotype: ♂, Nabang, Yingjiang, Yunnan, 2 November, 2019, coll. Peng Cui. Paratypes: 1♂, Banhong, Cangyuan, Yunnan, 5 August , 2016, coll. Baojie Du and Xinghui Zhu ; 1♂, Mengsong, Menghai, Yun- nan, 18 August, 2019, coll. Qidi Zhu and Yun Li.

Measurements (mm). Body: ♂ 10.5; pronotum: ♂ 3.8–4.1; tegmina: ♂ 17.0–18.1; metafemora: ♂ 10.0–10.2.

Distribution. China (Yunnan).

Discussion. The new species is most similar to Xiphidiopsis (Dinoxiphidiopsis) jacobsoni Gorochov, 1993 , but distinguished by unpaired hind median process of tenth abdominal tergite with apex obtusely rounded; apical half of cercus divided into 2 branches, dorsal branch lamellar, and shorter than ventral one finger-like, slightly narrower, both curved interiorly; and male subgenital plate nearly rectangular.

Etymology. The name of the new species is derived from the morphology of apical half of male cercus bifurcate.

Figures

FIGURE 1. Xiphidiopsis (Dinoxiphidiopsis) bifurcatis sp. nov., male: A–B. head and pronotum: A. dorsal view; B. lateral view; C–F. abdominal apex: C. lateral view; D. dorsal view; E. latero-dorsal view; F. ventral view; G. subgenital plate in ventral view.