Dongodytes (Dongodytodes) jinzhuensis, 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 : 81-83

Taxon classification Animalia Coleoptera Carabidae

Dongodytes (Dongodytodes) jinzhuensis sp. n. Figs 1d, 7, 11, 21, 26, 32, 39-40, 61-65, 73g

Description.

Length: 7.0-7.1 mm (mean 7.0 mm); width: 1.8-1.9 mm (mean 1.8 mm). Habitus as in Fig. 11.

Colour: Light dark brown, palps pale.

Macrosculpture: Head and pronotum smooth, elytra vaguely punctate, body moderately shiny and wholly pubescent.

Microsculpture: Densely and irregularly striate on head, pronotum and elytra.

Head (Fig. 21) very stout though elongate, distinctly longer than wide, HL/HW=2.6-2.8 (mean 2.7); widest at about middle from labrum, excluding mandibles as long as pronotum; head (including mandibles) plus prothorax as long as elytra; genae extremely dilated, making head much broader than any other species of the subgenus, about 2.7 times wider than collar-shaped neck, suddenly constricted before collar-shaped neck; nearly parallel-sided in median part; clypeus sexsetose; two pairs of supraorbital setae present, anterior setae distinctly longer than the posterior ones; a suborbital setae present, close to neck constriction; 2nd labial palpomere much longer than 3rd, bisetose on inner margin; ligula multi-setose apically; labial suture faintly traceable, mentum with two pairs of setae, at base and median parts respectively, a pair of mental pits present; mental tooth bluntly bifid at apex; submentum 10-setose; antennae short, extending at about apical 1/6 of elytra; 1st antennomere dilated, slightly longer than 2nd which is the shortest, 3rd the longest, twice as long as 2nd, gradually shortened from 4th towards 10th which is slightly shorter than 11th.

Prothorax much longer than wide though propleura distinctly tumid, widest at about 1/3 from base; front much narrower than base, PAW/PBW=0.8; pronotum narrower than head, PW/HW=0.8-0.9 (mean 0.9), and much narrower than prothorax, PW/PTW=0.8; lateral borders almost parallel-sided at apical and basal parts, gently and slightly expanded at about 1/3 from base, slightly sinuate before hind angles; front angles right, hind angles obtuse (Fig. 32); two pairs of latero-marginal setae present, at about 2/5 from base and a little before hind angles respectively.

Elytra moderately elongate (Fig. 7), much longer than wide, EL/EW=2.0; almost twice as wide as prothorax, EW/PTW=1.9-2.0 (mean 2.0); widest at about apical 2/5, lateral sides distinctly narrowed towards base (Fig. 32); striae well defined and punctate, two (middle and preapical) dorsal pores present on 3rd stria, at about 3/7 and apical 1/7 respectively; chaetotaxy of marginal umbilicate pores similar in Dongodytes deharvengi .

Male genitalia (Figs 39-40): Median lobe of aedeagus similar in Dongodytes deharvengi , but slightly shorter; copulatory piece indistinct in inner sac; in dorsal aspect the apical lobe broader apically, with sides slightly wider; right and left parameres each with four long setae apically.

Remarks.

Dongodytes (Dongodytodes) jinzhuensis sp. n. differs from other congeners by its extremely dilated head and narrowly elytral sides near base.

Etymology.

This new species is named after its type locality.

Material examined.

Holotype: male, Guangxi: Du’an: Gaoling: cave Jinzhu Dong II, 24° 06.514N, 108° 04.695E, 218 m, 2013-V-03, leg. Mingyi Tian, Weixin Liu, Feifei Sun & Haomin Yin, in SCAU; Paratypes: 1 males, 7 females, ibid; 3 males, 1 female, cave Jinzhu Dong I, 24° 06.547 N, 108° 04.785 E, 190 m, same date and collectors; all are in SCAU except one male paratype in MNHN.

Distribution.

China (Guangxi). Known only from caves Jinzhu Dong I and Jinzhu Dong II in Gaoling (Figs 1d and 73g).

The entrance of Jinzhu Dong I (Figs 61, 65) is very narrow and almost vertical. The passage is about half to three metres wide, eight to twelve metres high, and about 40 m long, ending with a pool in which cave fishes are living. The trechine beetles were collected in a section at about 10 to 25 m from the entrance.

Jinzhu Dong II (Figs 62, 64) is about 200 m far from Jinzhu Dong I. The entrance is much bigger, having easier access than Jinzhu Dong I. The structure of this cave is complicated, which is composed of several big halls and many passages. The length is still unknown. The beetles were collected in wet areas from 20 to 40 m far from the entrance (Fig. 63).

Other animals living in above caves are crickets, millipedes, scutigers, isopods, snails and fishes.