Tachycines (Gymnaeta) jinniui, Zhou & Yang, 2022

Zhou, Xulin & Yang, Weicheng, 2022, Ten new species of genus Tachycines (Orthoptera, Rhaphidophoridae, Aemodogryllinae) from karst caves in Guizhou, China, ZooKeys 1109, pp. 115-140 : 115

Tachycines (Gymnaeta) jinniui sp. nov.

Figs 2A , 14 , 15

Specimens examined.

Holotype, 1♀, Jinniu Cave (Fig. 14 ), Libo County, 2017-X-23, collected by Xulin Zhou, Dongshan Xu, Weicheng Yang; paratype, 1♀, same collection data as for holotype.

Diagnosis.

The new species is very similar to Tachycines (Gymnaeta) trapezialis Zhou & Yang, 2020 but differs from the latter by having slightly reduced eyes and the conical tubercles of the vertex intermediately reduce, the hind tibia dorsally on each side has 78-85 spines instead of 54-60 spines.

Description.

Female. Body medium sized. Vertex conical tubercles slightly reduced, apex obtuse, ommateum black and well developed. Legs elongate and slender; fore femur approx. 2.5-2.7 times longer than the pronotum, ventrally unarmed, the internal genicular lobe with a small spine, external genicular lobe with one elongate movable spur; ventral side of fore tibiae with one internal spur and two external spurs. Mid femur with an elongate movable spur on internal and external genicular lobes, ventrally unarmed; mid tibiae beneath with two internal spurs and two external spurs. Hind femur without ventral spine, internal genicular lobe without spine; hind tibiae dorsally on both sides with 79-86 spines, arranged in groups. Supra-internal spur of hind tibiae not exceeding ventral apex of hind tarsus. Hind tarsus keeled ventrally, with one dorsal apical spine. Cerci long and slender. Ovipositor shorter than half length of hind femur.

Male. Unknown.

Coloration.

Body color uniform, yellowish brown, eyes black.

Measurements

(mm). Body ♀ 13.7-16.7; pronotum ♀ 5.1-5.3; fore femur ♀ 13.6-14.1; hind femur ♀ 25.2-26.0; ovipositor 8.4-8.5.

Distribution of light zone.

Dark light zone.

Cave adaptation type.

Troglophile.

Etymology.

The new species is named after the collection locality of the specimens (Jinniu cave).

Figures

Figure 2. Tachycines (Gymnaeta) jinniui sp. nov., female, subgenital plate in ventral view.

Figure 14. Map of Cave Jinniu Dong, type locality of Tachycines (Gymnaeta) jinniui sp. nov. The arrowhead indicates where in the cave system the rhaphidophorids were found.

Figure 15. Distribution map for new species of subgenus Tachycines Gymnaeta from Guizhou mentioned in this study.