Ten new species of genus Tachycines (Orthoptera, Rhaphidophoridae, Aemodogryllinae) from karst caves in Guizhou, China Author Zhou, Xulin https://orcid.org/0000-0003-1297-2782 School of Life Sciences, Guizhou Normal University; Guiyang, Guizhou 550031, China & Guizhou Institute of Mountain Resources, Guiyang, 550001, China Author Yang, Weicheng School of Life Sciences, Guizhou Normal University; Guiyang, Guizhou 550031, China text ZooKeys 2022 2022-07-01 1109 115 140 http://dx.doi.org/10.3897/zookeys.1109.73937 journal article http://dx.doi.org/10.3897/zookeys.1109.73937 1313-2970-1109-115 52B4B12393434F85A27936717B1F8DFD 073AF5244E525317869AF55E12D0BF46 Tachycines (Gymnaeta) pinglangus sp. nov. Figs 5A-D , 15 Specimens examined. Holotype 1♂ , Lagaobieran Dong , Pinglang Town , Duyun City , 2015-VII-25 , collected by Qing Wen ; paratypes , 11♂ , 16♀ , 2015-VII-25 , collected by Qing Wen , Dongshan Xu , Yi Luo , Yuanchan Yu , Guang Zhang. Diagnosis. The new species is very similar to Tachycines (Gymnaeta) ferecaecus (Gorochov, Rampini & Di Russo, 2006): both species have a nearly quadrate-shaped epiphallus, but the new species can be distinguished from the latter by the absence of an ommateum (without any black facets), only the base of the ommateum was faintly visible. Description. Male. Body medium sized in the subgenus (Fig. 5A ). Vertex conical tubercles almost absent, ommateum completely reduced (appears to be without any black facets, only ommateum base); Legs elongate and slender; fore femur approx. 2.8-3.2 times longer than the pronotum, ventrally unarmed, external genicular lobe with one elongate movable spur, internal knee lobe without spine; fore tibiae beneath with one external spur (sometimes with two external spurs), but without internal spur. Mid femur with an elongate movable spur on the internal and external genicular lobes, ventrally unarmed; mid tibiae ventrally with one external spur and one internal spur. Hind femur without spines ventrally; hind tibiae dorsally with 12-15 internal spines and 12 or 13 external spines, sparsely arranged. Supra-internal spur of hind tibiae shorter than the ventral apex of hind tarsus. Hind tarsus with bristles ventrally. Ventral conical projections of 3rd-8th abdominal sternites developed, distally obtuse, and densely ciliated. Epiphallus of male genitalia nearly quadrate, median lobe of genitalia with a pair of wide apical lobules, but without distinct lateral sclerites (Fig. 5B ). Figure 5. Tachycines (Gymnaeta) pinglangus sp. nov., A male body in lateral view B male genitalia in dorsal view C female terminal in lateral view D female subgenital plate in ventral view. Female. Appearance is similar to the male. The subgenital plate is nearly triangular, and the apical area slightly obtuse. Ovipositor is longer than half of the hind femur length, brown, dorsal margin smooth, apical area of ventral margin denticulate, bent slightly upwards. Coloration. Body yellowish brown, ovipositor wheat. Measurements (mm). Body ♂ 9.5-13.0, ♀ 8.2-12.0; pronotum ♂ 3.2-3.8,♀ 3.2-3.4; fore femur ♂ 10.2-10.50, ♀ 10.2-10.4; hind femur ♂ 13.2-14.7, ♀ 13.2-14.6; ovipositor 8.0-10.4. Distribution of light zone. Dark light zone. Cave adaptation type. Troglobite. Etymology. The specific epithet refers to the locality where the type specimens were collected.