A contribution to cavernicolous beetle diversity of South China Karst: eight new genera and fourteen new species (Coleoptera: Carabidae: Trechini) Author Tian, Mingyi 0000-0003-2823-7619 mytian@scau.edu.cn Author Huang, Sunbin 0000-0001-8357-6651 Author Jia, Xinyang 0000-0003-1936-5926 527748207@qq.com text Zootaxa 2023 2023-02-15 5243 1 1 66 http://dx.doi.org/10.11646/zootaxa.5243.1.1 journal article 54139 10.11646/zootaxa.5243.1.1 1476f0e1-3886-401f-bf56-c294a0a99962 1175-5326 7642400 Hurites yunxianicus n. sp. Figures 1l , 17–19 Material. Holotype male, Yunxian Dong , Longhui County , Shaoyang , Central Hunan , 27.28 N , 110.89 E , 425 m , 2019-IV-30 , leg. Mingyi Tian , Mengzhen Chen & Zijun Ma , in SCAU . Diagnosis. Anophthalmic, large-sized for a species of the Cimmeritodes complex, body depigmented, elytra wholly covered with punctures. Description. Length: 5.9 mm ; width: 1.9 mm . Habitus as in Figure 17 . Body relatively thin and elongated, whole body densely pubescent, setae longer on head and pronotum, and shorter on elytra and underside surface; microsculptural engraved meshes indistinct; body brown, but mouthparts, palps and tarsi pale. Fore body including mandibles shorter than elytra, (HLm+PnL)/EL = 0.83. Head longer than wide, HLm/HW = 1.62, HLl/HW = 1.12, shorter (excluding mandibles) than pronotum, HLl/ PnL = 0.88, narrower than pronotum, HW/PnW = 0.75; genae subparallel-sided, densely setose, frons and vertex glabrous, widest at middle of head from labrum, frontal furrows long and deep, more divergent posteriorly, anterior and posterior supraorbital setiferous pores located at about basal 4/9 and 2/9 from base to labrum respectively; mandibles moderately developed, feebly curved apically; clypeus 4-setose, labrum emarginate at front, 6-setose; labial suture absent; mentum bisetose, base widely concave, tooth short and finely bifid at tip; submentum 2-setose (in holotype specimen), or 6-setose (in paratype ); ligula thick and short, multisetose at apex; palpomeres long and thin, all glabrous except 2 nd labial palpomere bisetose on inner margin, with an additional seta medially on outer margin; 2 nd labial palpomere 1.3 times as long as 3 rd , 3 rd maxillary palpomere 1.2 times as long as 4 th ; suborbital setae present ( Figure 18A ); antennae thin, pubescent from pedicel, scape stouter than others, as long as pedicel; 3 rd as long as 5 th , both are longest; comparative length of each antennomere from the 1 st to 11 th in holotype as: 1 st (1.21) / 2 nd (1.00) / 3 rd (1.84) / 4 th (1.63) / 5 th (1.90) / 6 th (1.81) / 7 th (1.72) / 8 th (1.54) / 9 th (1.53) / 10 th (1.41) / 11 th (1.55). Pronotum subquadrate, almost as long as wide, much narrower than elytra, PW/EW = 0.45; widest at about 1/4 from front, side margins evenly reflexed, more constricted backwards than forwards, suddenly sinuate before hind angles; base nearly straight, but sides contracted forwardly near hind angles, slightly narrower than front; the anterior latero-marginal setae located at the widest point of pronotum, and the posterior just before hind angle; disc moderately convex, anterior transversal impression faint, while posterior one well-marked. Scutellum small. Elytra elongate ovate, moderately convex dorsally, EL/EW = 1.68; whole side margins subserrate and ciliate, humeral angles widely rounded; scutellar striae absent; basal pore present; two dorsal pores present along the 3 rd stria, located at about basal 1/4 and apical 1/3 of elytra respectively, preapical pore located on the 3 rd stria, at about apical 1/7 of elytra much closer to suture than to apical margin of elytra; the humeral group of marginal umbilicate pores equidistantly located, the 1 st and 2 nd pores closer to marginal gutter; the 5 th and 6 th pores of the middle group very widely spaced, making 5 th much closer to 4 th than to 6 th ; the anguloapical pore present, equidistant to elytral margin and to suture. Legs moderately slender, tibiae without longitudinal sulcus; the 1 st tarsomere much shorter than, as long as and slightly longer than the 2 nd− 4 th combined in fore, middle and hind legs, respectively. The 1 st and 2 nd protarsomeres of male evidently widened. Prosternum rugose, with puncture-like structure; ventrites shortly pubescent; ventrites IV–VI each with a pair of paramedial setae, VII bisetose apically in male. Male genitalia ( Figure 8 ): Weakly-sclerotized, median lobe thin and elongated, moderately arcuate at median portion, apex flattened in lateral view; base small, sagittal aileron fairly large; inner sac armed with a large longitudinal copulatory piece which is about 2/7 as long as the median lobe; in dorsal view, apical lobe thin and tubiform, gradually narrowed towards apex which is rounded; parameres elongate, similar each other, much shorter than median lobe, right one provided with 3 long setae at apex, whereas 4 on the left. Female: Unknown. Etymology. Refers to Yunxian Dong, the type locality of this new species. Distribution. China ( Hunan ). Known only from the cave Yunxian Dong in Longhui County ( Figure 1l ). Yunxian Dong is a limestone cave near Shishan Village, about 40 km from the main town of Longhui County. It is an abandoned show cave. The total length is 1.2 km and there are some beautiful speleothems inside. The single beetle was found and collected in a wet area,about 200 metres from the entrance. Apart from cave beetles, a leech of the genus Sinospelaeobdella and a millipede ( Glyphiulus sp. ) were also observed in the cave ( Figure 19 ).