Pteronemobius yuani Ma & Wang, 2023

Wang, Rui, Yuan, Wei, Zheng, Yan-Na, Gu, Jun-Jie & Ma, Li-Bin, 2023, Pteronemobius yuani Ma & Wang sp. nov. and Metiochodes tianfuensis Ma, Yuan & Gu sp. nov., new species of Trigonidiidae from China (Orthoptera: Trigonidiidae; Trigonidiinae), Zootaxa 5361 (4), pp. 573-578 : 574-575

Pteronemobius yuani Ma & Wang sp. nov.

Figs. 1 , 2

Type materials. Holotype. China: ♁, Longsheng , Guangxi, 29-vi-2023, Libin Ma coll. ( SNNU) . Paratype. ♁, same collection information as the holotype.

Chinese name: ȐOEfi"Dz

Etymology. The Latin etymology of "yuan-" comes from the surname of Prof. Feng Yuan, whose 90th birthday will be celebrated next year, and we would like to honor his contribution to insect taxonomy by naming this species with his family name.

Description. Male. Body smaller than other species in this genus. Head small and pilose, almost equal to the width of the pronotum. Median ocellus circular, significantly smaller than the lateral ocellus. Vertex broad and flattened, weakly inclined. The frontal rostrum slightly convex when viewed from the front and as wide as the antennal scape. Antennal scape shield-like. Cheeks shiny and plump. Pronotum pilose, trapezoidal, armed with an irregular quadrilateral-shaped depression in the center; posterior margin wider than the anterior margin. The anterior margin concave in the middle, and the posterior margin straight.

Tegmina reaching the end of the abdomen. Basal field shorter than one-half of pronotum. One oblique vein and three chord veins. Mirror irregularly quadrangular. The apical field rather short. Hind wings invisible. The anterior tibia only bearing an outer tympanum. Inner dorsal spurs of the posterior tibia numbered four and the outer numbered three. Six apical spurs, three on each side, and inner apical spur longer than outer.

Male genitalia. Epiphallus short and epiphallic median lobe thin. Ectoparamere well-developed, divided into upper and lower parts, both of which bend inward. The upper part (the outermost ectoparamere) curved, with a pointed end; the ectoparamere of the lower part having two protrusions, with slightly blunt and flaky ends.

Female. Unknown.

Coloration. Body darkish brown. The base segments of the antennae light brown. Maxillary white at the end. Feet and circus light brown.

Measurements (mm). Male (n=2). BL 4.28±0.01, HL 0.87±0.09, HW 1.4±0.08, PL 0.95±0.005, PW 1.55±0.045, FWL 2.23±0.195, HFL 3.19±0.13.

Remarks. P. yuani sp. n. is similar to Pteronemobius gifuensis Shiraki, 1911 in appearance, but the medium ocellus of P. yuani sp. n. is smaller than the lateral ocellus and the occiput has no stripes. Male genitalia of P. yuani sp. n. are relatively similar to Pteronemobius yezoensis Shiraki, 1911 , but with the difference being that the size of the genitalia of P. yezoensis is significantly larger than that of P. yuani sp. n. On the back, the epiphallus median lobe of P. yezoensis is relatively thick and short.

Figures

FIGURE 1. Body of P. yuani sp. n. Scale bar: 2 mm.

FIGURE 2. Genitalia of P. yuani sp. n. A. dorsal view; B. lateral view; C. ventral view.