Tachycines (Gymnaeta) dispar, 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 : 303-304

Tachycines (Gymnaeta) dispar sp. nov.

( Figs. 100–103 )

Description. Male. Body small to medium sized. Vertex of head divided by conical tubercles. Legs elongate and slender; fore femur about 1.8 times longer than the pronotum, ventrally unarmed, internal knee lobe with a small 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 lobes, ventrally unarmed; mid tibiae beneath with 1 external spur and 1 internal spur. Hind femur without spines ventrally; hind tibiae above with 61–67 outer and inner spines respectively, arranged in groups. Upper internal spur of hind tibia exceeding ventral apex of metatarsus. Hind metatarsus keeled ventrally ( Fig. 100 ). Epiphallus of male genitalia nearly triangular and upper end notched ( Fig. 101 ).

Female. Subgenital plate nearly triangular and apex notched ( Fig. 103 ). Ovipositor longer than half the length of hind femur.

Coloration. Body dark or yellowish brown, mottled with dark blotches. Frons with 4 dark longitudinal bands.

Measurements. (length in mm) Body ♂ 10.5–14.0, ♀ 11.0–14.0; pronotum ♂ 5.5, ♀ 5.0–6.5; fore femur ♂ 10.0, ♀ 11.0–11.5; hind femur ♂ 21.0, ♀ 21.0–23.0; ovipositor 14.0–15.0.

Specimens studied. Holotype, 1♂, Leigong Mountain, Guizhou, alt. 1530–2160m, 2015-VII-28 ~30, collected by Qin Yan-Yan; paratypes, 2♂♂ 2♀♀, same data as the holotype.; 1♂, Fanjingshan, Jiangkou county , Guizhou, alt. 1800–2400m, 2014-VIII-5, collected by Sun et Li.

Distribution. China (Guizhou).

Diagnosis. This species is rather similar to T. (G.) verus sp. nov., but differs from the latter by the epiphallus of the male genitalia nearly triangular instead of nearly trapezoid and the hind tibiae are provided above on each side with 61–67 spines instead of with 50–51 spines.

Etymology. The specific epithet Latin ‘ dispar ’ refers to the unequal lengths of the spurs of the hind tibia.

Figures

FIGURES 100–103. Tachycines (Gymnaeta) dispar sp. nov.. 100. tarsus of hind leg, lateral view; 101. male genitalia, dorsal view; 102. male genitalia, ventral view; 103. female subgenital plate, ventral view. (scale=1mm)