Guiodytes deharvengi, Tian, Mingyi, 2014

Tian, Mingyi, 2014, New records and a new species of the cavernicolous genus Guiodytes Tian, 2013 from Guangxi, China (Coleoptera: Carabidae: Scaritinae), Zootaxa 3861 (4), pp. 355-362 : 357-361

Guiodytes deharvengi n. sp.

( Figs. 1 , 4–7 )

Holotype: male, Guangxi: Huanjiang Maonan Autonomous County: Shuiyuan Zhen: Sancai Cun: a cave named as Shuiku Dong, 24°49.430’N, 108°05.504’E, altitude 280 m, 2012-XII-4, leg. Louis Deharveng, Anne Bedos, Arnaud Faille and Mingyi Tian, in SCAU; paratypes: 1 male and 2 females, ibid, in SCAU and MNHN, Paris, respectively.

Length (from apex of left mandible to end of elytra): 9.2–9.5 mm; width: 2.5–2.8 mm. Habitus as in Fig. 4 .

Head stout, from apex of mandible longer than wide, HL/HW=1.16–2.02, mean 1.18, or slightly longer than wide when measured from apex of clypeus, HL/HW= 0.81–0.84, mean 0.83; distinctly narrower than pronotum, HW/PW=0.78–0.81, mean 0.8; clypeus (with wings) strongly transverse, convex, bisetose at base, widely and deeply emarginate at front, making clypeal wings very protruding anteriorly; supra-antennal plates well marked, clearly separated from clypeal wings by a small but obvious notch, nearly rounded, strongly convex, smooth and glabrous; frons and vertex convex; two pairs of supraorbital pores present, at behind of supra-antennal plates and at neck constriction, respectively, and both on supraorbital furrows; supraorbital furrows very deep and wide, parallel-sided at middle of frons, then strongly divergent afterwards, ended to posterior supraorbital pores; supraorbital carinae distinct; frontoclypeal sulcus indistinct; eyes completely disappeared; genae well developed, subparallel-sided, frontal portion strongly broadened laterally; neck constriction distinct, beginning at the level of hind supraorbital pores; labrum conspicuously transverse, distinctly narrower than clypeus excluding clypeal wings, 6-setose, and ciliate on both sides, slightly emarginated at anterior margin; mandible short and stout, right mandible with a distinct median tooth; palps ensiform, glabrous, apical segments of both maxillary and labial palps longer than penultimate ones respectively; labial palpomere 2 bisetose on inner margin; ligula unisetose at apex; labial suture well marked, deeply and widely furrowed in median portion; mentum well developed, with two pairs of setae, one pairs situated beneath mental tooth, the other at base near lateral margin; median tooth simple, blunt at apex, lateral lobes wide, gently and obliquely truncated; submentum narrow, quadrisetose. Antennae filiform, extended to scutellum; antennomeres 1 unisetose at subapex, antennomere 2 asetose, pubescent from antennomere 3; antennomeres 2 and 3 subequal in length; antennomeres 5–10 subcylindrical, somehow flat, evidently longer than wide.

Pronotum peltate in form, much wider than head; disc smooth, moderately convex; slightly wider than long, PL/PW=0.96–0.99, mean 0.97; apex deeply concave, beaded in median portion, fore angles strongly protruding, sharper than in G. cavicola ; widest at about middle, gently and gradually narrowed forwards to apex, and strongly contracted towards basal angles; side with three conspicuous teethed projections before hind angle; hind angle obtuse; two lateral setiferous pores present, anterior seta at about apical quarter, posterior one at about basal third, just before anterior lateral projection; marginal channel wide and uneven, narrower before anterior seta, wider between anterior and posterior lateral setae, ended before posterior seta; base unbordered; median line clear and deep; basal transverse impression deep and wide, rugose, and faintly carinated posteriorly; anterior transversal line free from median line, very close to anterior margin. Peduncle short, base of scutellum visible and rounded.

Elytra elongate ovate, wider than pronotum, EW/PW=1.34–1.35, mean 1.35, much longer than wide, EL/ EW=1.76–1.79, mean 1.78; strongly convex; widest at about middle, gently contracted anteriad and posteriad, base finely bisinuate; shoulders broadly obtuse, with two large serrated projections; apex pointed; side not parallelsided, distinctly crenulated from base to apical quarter; elytral striae punctate-striate, striae deep, intervals strongly convex; stria 1 with a small blunt tubercle at the base, just before scutellar pore; intervals 1–4 unbordered at base, other bordered at base; intervals 7 and 8 jointed before base, then jointed to interval 6 at base, all of them carinated near base; interval 3 with five foveolate setiferous pores at 8/9, 2/7, 1/2, 2/3 and 5/6 from base respectively; marginal channel with uninterrupted series of small setiferous pores and several large pores which bearing much longer setae; scutellar striae and scutellar pores present; hind wings reduced.

Underside of head covered with coarsely rugose and short wrinkles, proepisternum with dense isodiametric punctures, without wrinkle; pro-, meso- and metasterna smooth in middle portion, covered with small and sparse punctures at sides, pro-, meso- and meteepisterna coarsely punctured, epipleuron with a few coarser punctures near base; abdominal ventrites sparsely punctured at sides, each of ventrites IV–VI bearing a pair of paramedial setae, and ventrite VII of both male and female with two pairs of paramedial setae.

Legs rather stout and short; fore leg stout, profemur simple, moderately dilated; protibia well developed, quadridentate on outer margin, dorsal carina and sulcus distinct; lateral upper spine elongate ensiform, blunt at apex, much longer and stouter than subapical spur; protarsi short, tarsomere 1 much longer than other, tarsomeres 2–4 flat and transverse; middle and hind legs slender.

Male genitalia ( Figs. 5–6 ). Weakly sclerotized; median lobe of aedeagus stouter than in G. cavicola , strongly arcuated, ventral margin unisinuate, gently enlarged towards apex which is very broad; basal orifice small; inner sac armed with longitudinal copulatory piece, apical one longer and broader; parameres similar to G. cavicola .

Female genitalia ( Fig. 7 ). Similar to G. cavicola Tian, 2009 though gonocoxite and gonosubcoxite are slightly more slender; bursa copulatrix wide and folded, basally narrower; spermathecal gland very long and large, spermathecal gland duct wide and short.

Etymology. The name of this new species is dedicated to Prof. Dr. Louis Deharveng (MNHN, Paris), a wellknown biospeleologist.

Remarks. G. deharvengi n. sp. is similar to G. cavicola , but it is easily distinguished from the latter by its depigmented and stouter body, as well as its broader pronotum. Furthermore, elytra interval 3 bearing five dorsal setiferous pores in G. deharvengi n. sp. (while four pores in G. cavicola ).

Distribution. China (Guangxi: Huangjiang County) ( Fig. 1 ). Known only from Shuiku Cave, the type locality. In this cave are living also two blind trechines: Uenotrechus liboensis Deuve & Tian, 1999 (in Deuve et al., 1999) and Pilosaphaenops whitteni Tian, 2009.

Figures

FIGURE 1. Distributional map of the genus Guiodytes Tian, 2013 (a. showing the location of Guangxi within China; square: G. b e d o s a e Tian; star: G. cavicola Tian; round: G. deharvengi n. sp.)

FIGURE 7. Female genitalia of Guiodytes deharvengi n. sp., ventral view.

FIGURES 4 – 6. Guiodytes deharvengi n. sp. (4. habitus, female, paratype; 5. median lobe, lateral view; 6. right and left parameres, lateral view).