Svistella cangshanensis Ma & Tao, 2025

Tao, Li-Long, Yuan, Wei & Ma, Li-Bin, 2025, Svistella cangshanensis Ma & Tao, sp. nov., a new species of Trigonidiinae (Orthoptera: Trigonidiidae) from China, Zootaxa 5570 (1), pp. 189-193 : 191-192

Svistella cangshanensis Ma & Tao , sp. nov

( Figs 1–2 )

Chinese name: ḆƜ唧ñDz

Type materials. Holotype. China: ♂, Yunnan, Dali, Cangshan Mountain , 15-viii-2024, Wei Yuan & Li-Long Tao coll. ( SNNU) . Paratypes. 1♂, same collection information as the holotype .

Description. Male. Body small. Head. Head slightly wider than pronotum, occiput flat and smooth, only near the pronotum with slender setae. Frontal rostrum wider than antennal scape with slender setae.Antennal scape broad and cylinder-shaped with some thin pubescence; flagellum slender and filose. Eyes large with two dark stripes, extending to the occiput; ocellus invisible. Anteclypeus slightly convex, postclypeus trapezoid-shaped. Maxillary palpus flattened and broad at the end, horse-shoe shaped. The end of labial palpus inflated and triangular-shaped.

Thorax. Pronotum wide and flat with straight anterior and posterior margins. Pronotum with dark spots in the center and on both sides.

Legs. Legs slender with many bristles. Both sides of anterior tibiae with an oval tympanum, both the inner and the outer similar in shape and size. Outer surface of posterior femora with two stripes. Posterior tibiae with six dorsal spurs, both three ones on each side. Inner apical spurs of the posterior tibia numbered two while three ones on the outer side, and inner apical spur longer than the outer. The second tarsus short with pulvinate structure, and the claws with denticles.

Tegmina and wings. Tegmina long, reaching the end of abdomen. The vein of M and CuA fused, and separating at the mirror. The vein of CuPa branching into CuPaα and CuPaβ at the mirror; CuPaα branching into CuPaα1 and CuPaα2. One hv between PCuA and CuPa. PCuP and PCuA fused at the basic field; AA and AP also fused at the basic field; AP and PCuA before the basic field fused to di, and di short with unconspicuous curvature, fusing PCuA and CuPaβ. PCuA slightly curved, a transverse vein between PCuA and CuPaβ. The mirror with spurious vein; apical field short with many irregular veins and cells.

Genitalia. In dorsal view, the middle lobe of epiphallus narrow, and the lateral lobes of epiphallus broad; inner base of epiphallus slightly protruding and the end of the lateral lobe of the epiphallus narrow, sharp, slightly curved, and armed with denticles. In lateral view, the end of lateral lobe of epiphallus long and slender, and the ectoparameres small and weak, which rod-shaped in ventral view.

Female. Unknown.

Coloration. Body yellowish-brown. Head and pronotum brown. Eyes black and two yellowish-brown stripes between eyes. The center and both sides of pronotum with brown spots. Tegmina yellow. Legs yellowish-brown and the outer side of posterior femora with two brown stripes. The second tarsus and claws colored dark.

Measurements. Male (n=2). BL 5.51±0.07, HL 0.70±0.02, HW 1.59±0.04, PL 0.98±0.01, PW 1.56±0.02, FWL 4.46±0.13, HLL 4.17±0.12, CL 1.14±0.02.

Etymology. The Latin etymology of “ cangshanensis ” comes from collection site.

Distribution. China (Yunnan).

Remarks. S. cangshanensis is similar in appearance to S. wuyong . However, the pronotum of S. wuyong is reddish-brown and the end of posterior femur bears black spots. The pronotum of S. cangshanensis is yellowish-brown and the center and both sides of pronotum possesses brown spots. There are also obvious differences in genitalic characteristics between the two species. In S. wuyong , the end of the lateral lobe of the epiphallus becomes narrow, sharp, and almost straight. In S. cangshanensis , on the other hand, the end of the lateral lobe of the epiphallus becomes narrow, sharp, and curved.

Figures

FIGURE 1. A. The male of S. cangshanensis sp. nov. Scale bar: 2 mm; B. the pattern of the tegmen.

FIGURE 2. Genitalia of S. cangshanensis sp. nov. A. dorsal view; B. lateral view; C. ventral view.