Guiodytes weii Huang & Faille, 2021

Huang, Sunbin, Zhou, Jiajun, Tian, Mingyi & Faille, Arnaud, 2021, Three new species of the subterranean genus Guiodytes from Guangxi, China (Coleoptera: Carabidae: Clivinini), European Journal of Taxonomy 774, pp. 135-154 : 137-144

publication ID	https://doi.org/ 10.5852/ejt.2021.774.1537
publication LSID	lsid:zoobank.org:pub:68C21186-889C-4F61-8DF3-5752A8EA35AC
DOI	https://doi.org/10.5281/zenodo.5572581
persistent identifier	https://treatment.plazi.org/id/E0CD76FD-36A6-48D6-BDEE-21A62C3FDABD
taxon LSID	lsid:zoobank.org:act:E0CD76FD-36A6-48D6-BDEE-21A62C3FDABD
treatment provided by	Felipe
scientific name	Guiodytes weii Huang & Faille
status	sp. nov.

Treatment

Guiodytes weii Huang & Faille sp. nov.

urn:lsid:zoobank.org:act:E0CD76FD-36A6-48D6-BDEE-21A62C3FDABD

Figs 1–2 View Fig View Fig , 3D View Fig , 4D View Fig , 5C View Fig , 6 View Fig

Diagnosis

This new species is most similar to G. deharvengi Tian, 2014 , which also occurs in Huanjiang County, by the similar character configuration of the head and elytra. It is easily separated from the latter species by the clypeal wings not projecting anteriorly. Moreover, its body shape is much smaller and more slender, the elytral stria punctures are larger and sparser, and intervals four and five are carinated near the base.

Etymology

This new species is dedicated to Mr. Guofu Wei (Center of World Natural Heritage, Huanjiang) for his support during our biospeleological investigations.

Type material

Holotype CHINA • ♂; Guangxi, Huanjiang, Jiale, Dapo Dong ; 25°06′06.78″ N, 108°31′12.48″ E; alt. 211 m; 5 Dec. 2016; A. Faille leg.; SCAU. GoogleMaps

Description

Male

MEASUREMENTS. Length: 4.5 mm; width: 1.1 mm. Habitus as in Fig. 2. View Fig

BODY. Slightly depigmented, concolorous brown.

HEAD. Stout ( Fig. 3D View Fig ), from apex of mandible much longer than wide, HLm/HW=1.41, or slightly longer than wide when measured from apex of labrum, HLl/HW =1.06; distinctly narrower than pronotum, HW/ PW=0.67; clypeus with fused wings transverse, moderately convex medially, bisetose at base, anterior margin slightly bisinuate, bordered, clypeal wings not protruding anteriorly; supra-antennal plates well developed, gently rounded, reflexed, margined, strongly convex, smooth and glabrous; frons and vertex moderately convex, with longitudinal pore at middle; laterally with two setiferous pores, situated at posterior end of supra-antennal plates and at level of neck constriction, respectively; frontal furrows deep, wide, distinctly divergent posteriorly; frontal carinae distinct, slightly convergent to neck constriction; frontoclypeal sulcus not deep but distinct; eyes completely lacking; genae well developed, subparallelsided, sides nearly vertically truncated; neck constriction distinct, slightly stepped; labrum transverse, slightly wider than clypeus, seven-setose, ciliate laterally, straight at anterior margin; mandibles of moderate size. Palpomeres ensiform, glabrous, apical segments of both maxillary and labial palpomeres much longer than penultimate ones, respectively; labial palpomere 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 pair situated beneath mental tooth, the other at base near lateral margin, and with two large and deep concavities near base; median tooth simple, blunt at apex, lateral lobes wide, gently and obliquely truncated; submentum narrow, quadrisetose. Antennae filiform, rather short, reaching posterior angles of pronotum; scapus unisetose subapically, pedicellus smooth and glabrous, pubescent from antennomere three; pedicellus slightly longer than antennomere three; antennomeres five to ten subelongate, terminal segment slightly longer than penultimate. Underside of head rough.

THORAX. Pronotum peltate ( Fig. 3D View Fig ), much wider than head, slightly longer than wide, PL/PW=1.06; disc smooth, moderately convex; anterior margin slightly concave, beaded in median line; fore angles slightly protruding; widest at beginning of posterior third, gently and gradually narrowed anteriorly, strongly contracted towards posterior angles; posterior angles with obtuse teeth, lateral margin between posterior angles and basal constriction with two conspicuously toothed projections; with two pairs of lateral setiferous pores, anterior one at about anterior quarter, posterior one at basal angle and distinctly removed from channel; reflexed lateral margin with slight notches, lateral channel narrow before anterior seta, distinctly widened between anterior and posterior lateral setae, ending before posterior seta; basal constriction wide, basal carina narrow; median line engraved, deep, wide, distinctly joining basal constriction, surpassing anterior transverse line without joining. Peduncle short, scutellum small. Prosternum and propleura smooth, with dense and isodiametric abdominal punctuation.

ABDOMEN. Ventrites also densely punctured, ventrites four to six each with a pair of setae; ventrite seven with two pairs of subapical setae, widely separated at each side.

WINGS. Elytra elongate ovate, wider than pronotum, EW/PW= 1.27, much longer than wide, EL/ EW=1.86; strongly convex; widest behind middle, gently contracted anteriad and posteriad; base finely bisinuate, with a pair of additional tubercles followed by a basal setiferous puncture located at base of interval two; shoulders broadly obtuse, with sharp tooth; apex of elytra pointed; sides distinctly crenulated from base to apical quarter; elytral striae punctate-striate, wide and deep, with large and isolated punctures, only striae six and seven ending before reaching basal margin of elytron; intervals distinctly convex; intervals one to four unbordered at base; intervals seven and eight joined near base, then joined to interval six at base, intervals six to eight carinated throughout, intervals four and five carinated near base; arrangement of elytral setiferous chaetotaxy as in Fig. 4D View Fig , five foveolate setiferous pores on interval three; marginal channel with uninterrupted series of small setiferous pores and several large pores bearing much longer setae. Hind wings reduced.

LEGS. Moderately elongated; proleg stout, profemur distinctly dilated, smooth, with a long seta and two shorter ones; protibia well developed, with distinct and complete carina dorsally, sulcus indistinct, quadridentate; lateral teeth blunt at apex, lowest lateral one much shorter than others, upper two stoutensiform; subapical spur elongate-ensiform, blunt at apex, shorter and more slender than uppermost lateral teeth; protarsi slender, tarsomere one longer than tarsomeres two to four combined; meso- and meta-legs slender, with width of tarsomeres in both narrower than in proleg; mesotibia gradually dilated towards apex, with an elongated, tuber-like subapical spur, longer than wide and furnished with an isometric seta.

GENITALIA ( Fig. 5C View Fig ). Moderately sclerotized; aedeagus similar to those of G. deharvengi Tian, 2014 ( Fig. 5A View Fig ) and G. cavicola Tian, 2013 ( Fig. 5B View Fig ), median lobe gently arcuated ventrally, whereas strongly

arcuated in G. deharvengi , or evidently bisinuate in G. cavicola , blunt at apex; parameres asymmetrical, one much longer and broader than the other, both parameres with three long setae at apex.

Female

Unknown.

Distribution

China (Guangxi: Huanjiang County) ( Fig. 1 View Fig ). Known only from Dapo Dong cave. This cave opens at the bottom of a hill near a country road in the village of Jiale. The entrance is narrow, but accessible ( Fig. 6A View Fig ). It is about 90 m long with a short and narrow side passage inside. A large part of the passage is dry, but there are some moist places. The single blind beetle specimen was discovered on the moist wall about 30 m from the entrance at the left side of the main passage. Other syntopic cave animals were observed during the investigation in the cave, for instance, a flatworm and a bat.( Fig. 6B, D View Fig ).