Dongodytes (Dongodytodes) brevipenis, 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 : 80

Taxon classification Animalia Coleoptera Carabidae

Dongodytes (Dongodytodes) brevipenis sp. n. Figs 1j, h, i, 13-14, 23, 43-44, 56-60, 73i

Description.

Length: 6.8-7.1 mm (mean 6.9 mm); width: 1.7-2.0 mm (mean 1.8 mm). Habitus as in Figs 13-14, and 58-60.

Colour: Yellowish to light dark brown, palps pale.

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

Microsculpture: Similar in Dongodytes deharvengi .

Head (Fig. 23) elongate, much longer than wide, HL/HW=2. 7-3.0 (mean 2.9); widest at about middle (from labrum), excluding mandibles as long as prothorax, including mandibles much longer than pronotum (1.4-1.6 times, mean 1.5); head (including mandibles) plus prothorax as long as elytra; head rather slender, genae less expanded laterally and posteriad, nearly parallel-sided medially; collar-shaped neck distinct, about 3/7 as wide as head; two pairs of supraorbital setae present, anterior ones far from each other, posterior ones close to each other; a pair of suborbital setae present, a pair of mental pits present; mental tooth bluntly bifid at apex; 2nd labial palpomere bisetose on inner margin; clypeus transverse, sexsetose; ligula multi-setose; mentum and submentum fused partly, labial suture indistinct in median part; mentum sexsetose, apart from a pair of median setae beneath mental tooth, a pair of long basal setae present, and each accompanied by a short seta at front; submentum 10-setose; antennae extending at about apical 1/6 of elytra; 1st antennomere strongly dilated, much more wider than others, distinctly longer than 2nd which is the shortest, 3rd longest, about twice as long as 2nd, and slightly longer than 4th, then gradually shortened towards 10th which is slightly longer than 1st but shorter than 11th.

Prothorax with propleura strongly tumid, widest at about 1/3 from base; base much wider than front, PAW/PBW=0.7-0.8 (mean 0.7); pronotum much narrower than prothorax, PW/PTW=0.7-0.8 (mean 0.8), and narrower than head, PW/HW=0.8-1.0 (mean 0.9), with two pairs of latero-marginal setae at a little before middle and a little before hind angles respectively, lateral sides distinctly sinuate in front of hind angles.

Elytra moderately elongate ovate, twice as long as wide, EL/EW=2.0-2.1 (mean 2.0); widest at about 2/3 from base; elytral base narrow, with sides almost straight; about twice as wide as prothorax, EW/PTW=2.0-2.1 (mean 2.0); striae well defined and punctate, only preapical dorsal pore present, at about 1/7 from apex; chaetotaxy of marginal umbilicate pores similar in Dongodytes deharvengi , but 4th pore of humeral set is a little farer from 3rd.

Male genitalia (Figs 43-44): Median lobe of aedeagus very short, ventral margin gently arcuate, sagittal aileron distinct, basal orifice wide, apical part very short and bluntly rounded at apex; inner sac armed with a slender copulatory piece which covered with scale structures on surface, about 1/3 as long as the median lobe; in dorsal view, apical lobe very wide, much broader than other species of Dongodytodes ; parameres moderately developed, right and left ones each with three and four long setae at apex respectively.

Remarks.

Differs from other congeners by its slender body, genae nearly parallel-sided at middle, sexsetose mentum, unique dorsal pore on 3rd elytral stria, and very short aedeagus.

Etymology.

The name of this new species refers to its short aedeagus.

Material examined.

Holotype: male, Guangxi: Du’an: Longwan: cave Nongqu Dong I, 23° 56.021N, 108° 10.962E, 459 m, 2013-VI-27, leg. Mingyi Tian, Wei Lin, Weixin Liu, Haomin Yin & Sunbin Huang, in SCAU; Paratypes: 2 males, 5 females, ibid; 1 male, Guangxi: Du’an: Chengjiang: Ganwan: cave Nongzhong Dong I, 23° 56.644N, 108° 10.072E, 469 m, 2013-VI-27, same collectors as above; 13 males, 7 females, Guangxi: Du’an: Chengjing: Wanmao: cave Diaomao Dong, 24° 01.723N, 108° 07.236E, 140 m, 2013-VI-23, same collectors as above, in SCAU, IOZ, MNHN and ZUBM, respectively.

Distribution.

Guangxi ( Du’an). Known only from the type localities, cave Nongqu Dong in Longwan, and caves Diaomao Dong and Nongzhong Dong I in Chengjiang (Figs 1g, h, i and 73i).

The entrance of Nongqu Dong (Fig. 57) is localized on the bottom of a hill and close to a corn field surrounded by trees. It is about 300 m long, with a lot of water droppings, and a small stream inside. It is a beautiful cave, with magnificent stone pillars, stalactites and stalagmites.

The entrance of Nongzhong Dong I (Fig. 56) is in a sugarcane field. It is about 80 m long, composed of a main passage and several small galleries. At the end of the main passage there is an underground river which is about two kilometres long said by the local people.

Diaomao Dong I (Fig. 58) is localized at the foot of a hill near the village Nongzhong. It’s length is about 100 m. The entrance is surrounded by bamboos. The cave is wet, with several small pools and a stream.

The trechine beetles were collected in several places of dark areas in the caves. Other animals living in the above caves are crickets, mosquitoes, staphylinids, millipedes, centipedes, isopods, harvestmen, spiders, snails and cave fishes.