Tachycines (Gymnaeta) liboensis, Zhu & Chen & Shi, 2020

Zhu, Qidi, Chen, Huiming & Shi, Fuming, 2020, Remarks on the genus Tachycines Adelung, 1902 (Orthoptera: Rhaphidophoridae Aemodogryllinae) with description of eight new species from caves in southern China, Zootaxa 4809 (1), pp. 71-94 : 73-74

1. Tachycines (Gymnaeta) liboensis sp. nov.

( Figs. 1 , 16 A–C, 18 B; Map 1)

Description. Male. Body medium-sized. Fastigium verticis with 2 conical short tubercles, apices blunt. Eyes oval, protruding forwards; median ocellus oval, located between antennal sockets; lateral ocelli nearly circular, situated on lateral margins of basal fastigium verticis, about two thirds of fastigium verticis. Apical segment of maxillary palpus obviously longer than subapical one, apical area inflated, globular.

Pronotum broad, anterior margin of disc straight, posterior margin rounded; lateral lobe longer than high, ventral margin arc-shaped. Posterior margin of mesonotum rounded, lateral lobe slightly protruding backwards, posterior margin of metanotum straight.

Fore coxa with 1 small spine; fore femur unarmed on ventral surface, internal genicular lobe with 1 small spine, external genicular lobe with 1 long spine; fore tibia with 1 inner spine and 2 outer spines on ventral surface, apex with 1 extero-dorsal spine and 1 pair of ventral spines, between the paired ventral spines with 1 small spine. Middle femur unarmed on ventral surface, internal and external genicular lobes with 1 long spine separately; middle tibia with 1 inner spine and 1 outer spine on ventral surface, apex with 1 pair of dorsal spines and 1 pair of ventral spines, between the paired ventral spines with 1 small spine. Hind femur unarmed on ventral surface, internal and external genicular lobes unarmed; hind tibia with 88 inner spines and 79 outer spines on dorsal surface, subapex with 1 pair of dorsal spines, apex with 1 pair of dorsal spines and 2 pairs of ventral spines, intero-dorsal spine slightly shorter than hind basitarsus, which with 1 dorsal spine. Genitalia is shown as the picture.

Female. Unknown.

Coloration. Body color uniform, yellowish-brown, eyes black.

Material examined. Holotype: male, Maan Cave, Banzhai , Libo County, Guizhou, 25 October, 2009, coll. Huiming Chen.

Measurements (mm). Pronotum: ♂ 5.5; fore femur: ♂ 14.3; hind femur: ♂ 26.5; hind tibia: ♂ 30.0; hind basitar- sus: ♂ 6.0.

Distribution. China (Guizhou).

Etymology. The name of the new species refers to the type locality.

Discussion. The new species can be easily distinguished from known congeneric species by the structure of male genitalia.

Figures

FIGURE 1. Tachycines (Gymnaeta) liboensis sp. nov., male: A–C. head and pronotum: A. frontal view, B. dorsal view, C. lateral view; D. hind basitarsus in lateral view.

FIGURE 16. Male genitalia. A, D, G, I, K, M, O: dorsal view; B, E, H, J, L, N, P: ventral view; C: lateral view; F: apical view: A–C. Tachycines (Gymnaeta) liboensis sp. nov.; D–F. Tachycines (Gymnaeta) umbellus sp. nov.; G–H. Tachycines (Gymnaeta) bifolius sp. nov.; I–J. Tachycines (Gymnaeta) tuberus sp. nov.; K–L. Tachycines (Gymnaeta) paradoxus sp. nov.; M–N. Tachycines (Gymnaeta) nulliscleritus sp. nov.; O–P. Tachycines (Gymnaeta) taenus sp. nov.