Sichuana feicui He, 2020

He, Zhu-Qing, Gong, Pu, Hu, Tian-Hao, Yin, Zi-Xu, Shen, Zi-Hao, Wang, Bai-Qiu & Li, Kai, 2020, A new species of genus Sichuana from Sichuan, China (Orthoptera: Tettigoniidae Tettigoniinae), Zootaxa 4877 (1), pp. 195-200 : 196-198

Sichuana feicui He sp. nov. ( Figs. 1 A–C; 3; 5A, C)

Holotype: male, CHINA, Sichuan, Mao county, N 31°40′54″, E 103°50′59″, Alt. 2000 m, 20-vii-2020, coll. He Zhu-Qing. (depository: East China Normal University , China)

Paratypes: 15 males & 6 females, same data as holotype .

Description. Male. Very similar to S. cryptospina in morphology. Head frons flat, slightly oblique ( Fig. 1A, B ). Fastigium of vertex almost as wide as the scape of antenna. Eyes round and projecting outward. Anterior margin of pronotum concaved and posterior margin blunt, median sulcus distinctly M-shaped, lateral carina distinct in metazona, faintly indicated in prozona; lateral lobes longer than deep, with humeral sinus. Prosternum with a pair of slender spiniform processes. Mesosternum with a pair of triangular lobe-shaped processes, nearly equal in length to width ( Fig. 3J ). Metasternum with a pair of obtuse triangular lobe-shaped processes, broader than long ( Fig. 3J ). Tegmina expanded with longitudinal and cross veins, twice as long as pronotum ( Fig. 1A, B ). Dorsal field as wide as the disc of metazona from basic to middle, then gradually narrow distad ( Fig. 3G ). Lateral field broadened and deep ( Fig. 3H ). Mirror on right tegmina, little longer than wide ( Fig. 3G ). Hind wings short than pronotum ( Fig. 3I ).

Fore femora unarmed, fore tibiae dorsally armed 3 external spines and internal unarmed, ventrally with 6 pair of spines. Middle femora unarmed, middle tibiae dorsally with 4 internal spines and 2 external spines, ventrally with 6 pair of spines. Hind femora dorsally unarmed, ventrally with 6 spinules on inner side and 3 on outside; hind tibiae dorsally with 22-27 spines on both side and 1 pair of apical spurs, ventrally with 6-9 spines on both sides and 2 pair of apical spurs. Tenth abdominal tergite concaved in the middle and pileous ( Fig. 3A ). Cercus conical, incurved at apical part, apices blunt, basal area with a spiniform inner tooth placed ( Fig. 3A ). Subgenital plate length longer than width, with lateral carinae, middle part of posterior margin with a deep triangular excision ( Fig. 3B ). Titillators with long apical portions bearing numerous denticles ( Fig. 3C ).

Female. Tegmina shorter than pronotum ( Fig. 1C ). Hind wings as long as tegmina. Cercus conical and pileous ( Fig. 3E ). Posterior margin of tenth abdominal tergum with a wide round projection, apical with a notch ( Fig. 3E ). Subgenital plate nearly trapezoid, wider than longer, middle of posterior margin concaved ( Fig. 3F ). Ovipositor shorter than hind femora, slightly decurved at apical part ( Fig. 3D )

Coloration. Body generally brown and green ( Fig. 1 A, B ). Head brown, but face nearly yellow. Upper half of compound eyes yellow and lower half brown. Labrum and clypeus brownish red. Disk of pronotum and upper half of lateral lobe of pronotum brown. Lower half of lateral lobe of pronotum white. Dorsal field of male tegmen brown, lateral part of male tegmen green with white longitudinal veins. Female tegmen brown in dorsal field and green in lateral field. Dorsal abdominal tergum brown. Cercus brown. Legs dark brown with black spots on upper half and black vertical stripes on outside ( Fig. 5A ). Ovipositor brown.

Measurements (mm). male: body length 22.07–27.81, pronotum length 8.24–9.23, tegmen length 14.55–16.85, hind femur length 22.78–24.71; female: body length 27.69–30.30, pronotum length 9.13–9.79, tegmen length 5.49–6.54, hind femur length 26.77–29.08, ovipositor length 22.88–23.40.

Etymology. The specific epithet feicui is for Chinese phonetic alphabets ËẸ, which is Chinese jade with green color. feicui is used for the species name for emphasis on its green color.

Songs. The calling song of this species is stereotyped and constant. There are about eleven chirps per minute. Chirp cycle duration is 4.723± 0.688 s. In each chirp, there is a short beginning (0.5 s), and then followed by the rest. In wild, we found that after a male began singing, others would follow him. When one male stops singing, others would also stop after two or three chirps.

Distribution. Mao county, Sichuan Province, China. This new species is distributed in the northeast area of Wenchuan, where S. cryptospina is distributed ( Fig. 4 ).

Figures

FIGURE 1. Sichuana species in wild. A. male of S. feicui sp. nov.; B. male of S. feicui sp. nov. (brown morph); C. female of S. feicui sp. nov.; D. male of S. cryptospina.

FIGURE 3. Features of Sichuana feicui sp. nov. A. tenth abdominal tergum and cercus of male in dorsal view; B. subgenital plate and cercus of male in ventral view; C. titillators; D. ovipositor in lateral view; tenth abdominal tergum and cercus of female in dorsal view; F. subgenital plate and cercus of female in ventral view; G. male tegmen in dorsal view; H. male tegmen in lateral view; I. hind wing and abdomen in dorsal view; J. abdomen in ventral view.

FIGURE 4. Calling songs of S. feicui sp. nov. in 10 and 0.5 seconds.

FIGURE 5. Compare of Sichuana species in the color pattern of hind femur, and the shape of cercus. A. right hind femur of S. feicui sp. nov.; B. right hind femur of S. cryptospina; C. cercus of male S. feicui sp. nov.; D. cercus of male S. cryptospina.