Tachycines (Gymnaeta) yueyangensis, 2019

Qin, Yanyan, Liu, Xianwei & Li, Kai, 2019, Review of the subgenus Tachycines (Gymnaeta) Adelung, 1902 (Orthoptera, Rhaphidophoridae, Aemodogryllinae, Aemodogryllini), Zootaxa 4560 (2), pp. 273-310 : 292-294

Tachycines (Gymnaeta) yueyangensis sp. nov.

( Fig. 59–61 ; Pics. 3–4)

Description. Male. Body medium sized for this genus. Vertex of head divided into conical tubercles. Legs elongate and slender; fore femur about 2.4–2.5 times longer than pronotum, ventrally unarmed, internal knee lobe without spine, external genicular lobe with 1 elongate movable spur; fore tibiae beneath with 2 external spurs and 1 internal spur. Mid femur with an elongate movable spur on the internal and external genicular lobe, ventrally unarmed; mid tibiae beneath with 1 external spur and 1 internal spur. Hind femur without spines ventrally; hind tibiae above at each side with 72–77 spines, arranged in groups. Supra internal spur of hind tibiae not exceeding ventral apex of hind metatarsus. Hind metatarsus keeled ventrally. Male genitalia as Figs. 59–60 .

Female. Subgenital plate near trapeziform, hind margin with a small projection ( Fig. 61 ). Ovipositor slightly shorter than half the length of hind femur.

Coloration. Body yellowish brown. Hind femur mottled with stripes.

Measurements. (length in mm) Body ♂ 9.0–10.0, ♀ 11.0; pronotum ♂ 5.0, ♀ 5.0; fore femur ♂ 12.5, ♀ 12.0; hind femur ♂ 22.0, ♀ 21.5; ovipositor 10.5.

Specimens studied. Holotype, 1♂, Yueyang, Fushou mountain forest park, Hunan, alt. 1079m, 2016-IX- 18 ~26, collected by Jiang et al.; paratypes, 1♂ 1♀, same data as holotype; 7♂♂, 4♀♀, Yueyang, Fushou mountain forest park, Hunan, alt. 1079–1270m, 2018-IX-15 ~17, collected by Qin Yan-Yan et Zhang Sai-Nan.

Distribution. China (Hunan).

Diagnosis. This species is rather similar to T. (G.) semicrenatus ( Gorochov et al., 2006) regarding the shape of the male epiphallus, but it differs distinctly from the latter by the hind metatarsus that is keeled beneath, and by the hind tibiae of T. (G.) yueyangensis sp. nov. being provided with more than 70 spines on each side; corresponding status of T. (G.) semicrenatus ( Gorochov et al., 2006) : the hind tibiae with less than 40 spines, the hind metatarsus with bristles beneath.

Etymology. The specific epithet refers to the locality where the type specimens has been collected.

PICTURES 3–4. Tachycines (Gymnaeta) yueyangensis sp. nov.. 3. habitus of male. 4. habitus of female. (photographed from Hunan, Yueyang)

Figures

FIGURES 59–61. Tachycines (Gymnaeta) yueyangensis sp. nov.. 59. male genitalia, dorsal view; 60. male genitalia, ventral view; 61. female subgenital plate, ventral view. (scale=1mm)