Tachycines (Gymnaeta) parvus, 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 : 280

Tachycines (Gymnaeta) parvus sp. nov.

( Figs. 12–15 )

Description. Male. Body small sized for this genus. Vertex of head divided by conical tubercles. Legs elongate and slender; fore femur about 2.0 times longer than the pronotum, ventrally unarmed, the internal genicular 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 ventral spines; hind tibiae above on both side with 59–65 spines, arranged in groups. Supra internal spur of hind tibiae not exceeding ventral apex of hind metatarsus. Hind metatarsus with bristles ventrally ( Fig. 12 ). Male genitalia as Figs. 13–14 .

Female. Subgenital plate nearly triangular and apex projecting ( Fig. 15 ). Ovipositor slightly longer than the half the length of the hind femur.

Coloration. Body light brown, mottled with dark brown blotches. Frons with 4 longitudinal bands (one pair below eyes, another pair below antenna).

Measurements. (length in mm) Body ♂ 5.5–8.0, ♀ 6.0–7.0; pronotum ♂ 3.5, ♀ 4.0; fore femur ♂ 7.0–7.5, ♀ 6.0– 7.0; hind femur ♂ 13.0, ♀ 13.0–14.0; ovipositor 7.0–9.0.

Specimens studied. Holotype, 1♂, Lushui, Pianma Zhen , Yunnan, alt. 2300m, 2010-VII-6 ~7, collected by Bi Wen-Xuan; paratypes, 2♂♂ 3♀♀, same data as holotype.

Distribution. China (Yunnan).

Diagnosis. This species is similar to T. (G.) wuyishanicus ( Zhang & Liu, 2009) , but differs by: epiphallus of male genitalia with upper notch smaller than lower notch, female subgenital plate triangular, at base almost as wide as length of plate, tip acute; corresponding status of T. (G.) wuyishanicus ( Zhang & Liu, 2009) : epiphallus of male genitalia H-shaped, female subgenital plate triangular or quadrate, tip blunt.

Etymology. The specific epithet refers to the small size of the body.

Figures

FIGURES 12–15. Tachycines (Gymnaeta) parvus sp. nov.. 12. tarsus of hind leg, lateral view; 13. male genitalia, dorsal view; 14. male genitalia, ventral view; 15. female subgenital plate, ventral view. (scale=1mm)