Dongodytes (Dongodytodes) yaophilus, Tian, Mingyi, Yin, Haomin & Huang, Sunbin, 2014

Tian, Mingyi, Yin, Haomin & Huang, Sunbin, 2014, Du'an Karst of Guangxi: a kingdom of the cavernicolous genus Dongodytes Deuve (Coleoptera, Carabidae, Trechinae), ZooKeys 454, pp. 69-107 : 83-87

Taxon classification Animalia Coleoptera Carabidae

Dongodytes (Dongodytodes) yaophilus sp. n. Figs 1a, 15, 24, 45-46, 70-73d

Description.

Length: 7.7-7.9 mm (mean 7.76 mm); width: 1.8-1.9 mm (mean 1.83 mm). Habitus as in Figs 15 and 72.

Colour: Less depigmented than other species of Dongodytodes , yellowish to dark reddish brown, palps pale.

Macrosculpture: Head and pronotum smooth, elytra vaguely punctate, body moderately shiny and wholly pubescent except mesostenum which is glabrous.

Microsculpture: Engraved meshes densely striate, more transverse on head and pronotum, and irregularly on elytra.

Head (Fig. 24) elongate, much longer than wide, HL/HW=3.0-3.1 (mean 3.1); widest at about middle including mandibles, excluding mandibles slightly longer than pronotum; genae moderately expanded posteriad, then suddenly constricted before the collar-shaped neck which is about 2/5 as wide as head; clypeus sexsetose; two pairs of supraorbital setae present, anterior ones far from each other and the posterior close to each other; a pair of suborbital setae present, mentum and submentum completely fused, mentum with two pairs of setae, at base and median part respectively, a pair of mental pits present; mental tooth bluntly bifid at apex; submentum 10-setose; 2nd labial palpomere bisetose on inner margin; ligula multi-setose apically; antennae comparatively long, extending at about apical 1/8 of elytra; 1st antennomere much more dilate than others, slightly longer than 2nd which is shortest, 2nd about half as long as 3rd which is the longest, then gradually shortened towards to 10th which is as long as 1st, and shorter than 11th.

Prothorax long, propleura less tumid than other species of the subgenus, PW/PTW=0.8-0.9 (mean 0.8); widest at about 2/7 from base, front distinctly narrower than base, PAW/PBW=0.7-0.8 (mean 0.7); pronotum slightly narrower than head, PW/HW=0.9; two pairs of latero-marginal setae present, at about 4/7 from base and a little before hind angles respectively, lateral sides distinctly sinuate just before hind angles; front angles right, hind angles obtuse.

Elytra more elongate and a little more convex than other species of Dongodytodes , as long as head (including mandibles) and pronotum combined; almost twice as long as wide, EL/EW=2.1; much wider than prothorax, EW/PTW=1.7-2.1 (mean 1.9); base rather slender, lateral sides near base almost straight; widest at about apical 4/7 of elytra; striae punctate, more or less traceable, two (middle and preapical) dorsal pores present on 3rd stria, at about 3/5 and 1/6 respectively; chaetotaxy and other characters as in Dongodytes deharvengi .

Male genitalia (Figs 45-46): Median lobe of aedeagus long and slender, similar in Dongodytes deharvengi , but apical part more straight, and blunt at apex; inner sac armed with a large and long copulatory piece which covered with scale structures on surface, about 2/5 as long as the median lobe; in dorsal aspect the apical lobe broader and sides distinctly sinuate at subapical part; right and left parameres with three and four long setae at apex respectively.

Remarks.

By its long and large body, together with more elongate genae and longer antennae, Dongodytes yaophilus sp. n. is easily distinguished from other members of Dongodytodes . It is probably close to Dongodytes deharvengi because both of them have similar aedeagal structure and elytral chaetotaxal pattern.

Etymology.

“Yao” is a short name for the minority Yao people who are living in the mostly karstic mountainous areas in several provinces or regions of southern China (Guangxi, Hunan, Guangdong and Guizhou). Both Dahua and Du’an are Yao Autonomous Counties. The name indicates that this new species lives in the same region as Yao people.

Material examined.

Holotype: male, Guangxi: Dahua: Qibainong: cave Qiaoxu Dong, 24° 04.370N, 107° 40.140E, 535 m, 2013-VI-22, leg. Mingyi Tian, Wei Lin, Haomin Yin & Sunbin Huang; Paratypes: 3 females, ibid, all in SCAU.

Distribution.

Guangxi (Dahua) (Figs 1a and 73d). Known only from the type locality, cave Qiaoxu Dong.

Qiaoxu Dong (Figs 70-71) is located at about 250 m from village Qiaoxu in the west, along the main road from Qibainong to Dahua. It is a large cave, 420 m long, 15 to 140 m wide and six to 30 m high, having three large halls. The largest hall is about 336, 000 m2 in area, one of the largest in Guangxi. It is a beautiful cave within Qibainong National Geopark in Dahua County. The beetles were collected in the areas of 70 to 100 m from the entrance. Other cave animals in Qiaoxu Dong are crickets, spiders, millipedes, isopods and snails.