A contribution to the knowledge of cavernicolous ground beetles from Sichuan Province, southwestern China (Coleoptera, Carabidae, Trechini, Platynini)

Abstract Two new genera and four new species of cave-adapted ground beetles are described from Sichuan Province, southwestern China. Uenoaphaenopsgen. nov. is established to place the trechine species Qianotrechus fani Uéno, 2003 occurring in the limestone cave Hua’er Dong, southeastern Sichuan (Luzhou: Gulin). Chu pheggomisetoidesgen. nov. & sp. nov., from the limestone cave Hanwang Dong, northeastern Sichuan (Guangyuan: Chaotian), is somewhat like the European cavernicolous trechine genus Pheggomisetes Knirsch, 1923, from Bulgaria and Serbia, in particular in the configurations of head and pronotum. Boreaphaenops liyuanisp. nov., also from Hanwang Dong, is the second representative of the genus and the first record in Sichuan. Agonotrechus sinotroglophilus Deuve, 1999, a troglophile, is reported from Sichuan for the first time. The other two new species belong to the platynine genus Jujiroa Uéno, 1952: J. uenoisp. nov. from the cave Banche Dong on the northern side of the Dadu River (Leshan: Shawan) and J. wangzhenisp. nov. from the cave Hua’er Dong, which is sympatric with Uenoaphaenops fani (Uéno, 2003) comb. nov. A distribution map for the localities of all abovementioned caves and a key to Jujiroa species known in Sichuan are provided.


introduction
Sichuan Province without question holds the richest specific diversity of Carabidae sensu lato in China. Over one fourth (1189) of the total species (3946) known in China occur in Sichuan (Anichtchenko et al. 2007(Anichtchenko et al. -2020. On the contrary, the subterranean fauna of Carabidae is comparatively poor in this province, with the only exception, the troglobitic platynine genus Jujiroa Uéno, 1952 which is very rich in Sichuan. Five of the eight Jujiroa species known in mainland China were reported from Sichuan (Vigna Taglianti 1995;Uéno and Kishimoto 2001;Uéno 2007;Deuve and Pütz 2013;Tian and He 2020).
However, the cave fauna of the ground beetles in Sichuan is interesting. For example, Troglopatrobus zhouchaoi Deuve et al., 2020, known only from the cave Lianhua Dong in Pengzhou in the northern suburb of Chengdu, the provincial capital city, is morphologically highly modified and the only Patrobini species occurring in subterranean habitats in the world (Deuve et al. 2020). Species of the genus Sichuanotrechus Deuve, 2005, together with Duvalioblemus (Shublemus) liyuani Deuve et al., 2020 occur only in the Longmen Mountains of northern Sichuan (Deuve 2005;Uéno 2006Uéno , 2008Huang and Tian 2015). Qianotrechus fani Uéno, 2003 is only found inside the cave Hua'er Dong in Gulin County, in the southeastern corner of the province (Uéno 2003;Deuve et al. 2020). Agonotrechus sinotroglophilus Deuve, 1999, a troglophilous species formerly recorded from Chongqing (Deuve 1999;Deuve and Tian 2016) was newly found in a cave in northeastern Sichuan. Another troglophilous species, Trechiotes perroti Jeannel, 1954, occurs in a large area in southwestern China including Sichuan Tian 2011, 2016).
Thanks to the Sichuan Cave Exploration Team (SCET, Chengdu), in which the cave biology group is led by Li He (the second author of the present paper), our knowledge of cave ground beetles in Sichuan Province is quickly increasing. The majority of members of SCET are young and active cavers (Fig. 1). In recent years, they have conducted many cave surveys which resulted in important scientific discoveries in terms of cave invertebrates, especially ground beetles. For instance, they found one of the richest cave fauna of ground beetles recorded from China in the limestone cave Hanwang Dong, northeastern Sichuan (Guangyuan: Chaotian). Four cave-adapted carabid species in total have been collected in this beautiful limestone cave: a pterostichine species belonging to the Pterostichus subgenus Huaius , two new troglobitic trechine species and the troglophile Agonotrechus sinotroglophilus Deuve, 1999. They have re-discovered almost all species of the genus Sichuantrechus. From two caves in Leshan and Luzhou respectively, they found another two new Jujiroa species apart from J. deliciola Uéno & Kishimoto, 2001 and the recently described J. zhouchaoi Tian &.
Qianotrechus fani Uéno, 2003 was the first troglobitic trechine beetle reported from Sichuan. This species was named in honour of the person who provided crucial support to Dr Shun-Ichi Uéno during his collecting travels in China from 1998 to 2010 based on a so-called international scientific collaborative project, which resulted in fruitful discoveries on subterranean ground beetles. Qianotrechus fani is a very peculiar member within the genus Qianotrechus Uéno, 2000 not only because of its locality which is far from those of other congeners, but also its morphological character states which are very different from the other species of the genus. Uéno (2003) tentatively treated it as a Qianotrechus species because only a female was available at that time. Thanks to Dr Yunchun Li (an expert of Pseudoscorpiones from China West Normal University, Nanchong), the first author received three individuals of Q. fani collected in the cave Hua'er Dong, the type locality. Later, Yuan Li and Zhen Wang (both are local amateur entomologists) who also surveyed in Hua'er Dong, successfully collected three specimens of the species. Further laboratory study revealed that there is no sexual dimorphism in this species, i.e., the protarsi are not modified in male, and abdominal ventrite VII is quadrisetose in both sexes. Furthermore, the male genital organ of Q. fani is very short and stout, contrary to the other Qianotrechus species in which it is always thin and long. These crucial features, plus other peculiar morphological characters, strongly support that Q. fani belongs to an unknown genus rather than Qianotrechus.
The aim of this paper is to establish a new genus for Uéno's Qianotrechus fani, describe another new genus and two new species of the tribe Trechini from the cave Hanwang Dong, give the first record of Agonotrechus sinotroglophilus for Sichuan Province, and describe two new species of the Platynini genus Jujiroa.
This paper is dedicated to the late Dr Shun-Ichi Uéno, a well-known cave biologist in National Science Museum (Natural History), Tokyo, who unfortunately passed away on October 3, 2020.

Material and methods
The material for this study were discovered from three caves in Sichuan Province, namely, Hanwang Dong, Hua'er Dong and Banche Dong (Fig. 2). Beetles were collected using an aspirator or trap baited with silkworm (Bombyx mori L., 1758) chrysalis meal, killed with ethyl acetate and kept in vials with 75% ethanol; a few specimens were kept in 95% ethanol, for DNA sequencing.
The specimens were examined with a Nikon SMZ1000 stereo-microscope in a solution of glycerin. All illustrations were completed using Adobe Illustrator CS 6.0 based on digital photos taken by means of a Keyence VHX-5000 digital microscope. The distribution map was drawn using MapInfo Professional 12.0 software.
Length of body is measured from the right mandible (when opened) to the apex of the elytra. Width of body is the maximum width of combined elytra. Abbreviations of measurements used in the text are as follows:

EL
length of elytra, from base of scutellum to elytral apex EW maximum width of combined elytra HLl length of head excluding mandibles, from front of labrum to base of head HLm length of head including mandibles, from apex of right mandible to base of head HW maximum width of head PfW width of pronotum at front PbW width of pronotum at base PL length of pronotum, through mid-line PW maximum width of pronotum Generic characteristics. Medium-sized, aphaenopsian and depigmented; body moderately elongate, wholly pubescent. Head strongly elongate, much longer than wide, nearly parallel-sided; neck weakly-marked, ring-shaped; two pairs of supraorbital setiferous pores present; frontal furrows incomplete, parallel-sided in most part though briefly divergent posteriorly; frons and vertex convex; right mandibular tooth bidentate; mentum and submentum completely fused; mentum bisetose, and covered with short setae on basal area of mental tooth, and along the site of labial suture; base largely concave, uni-foveate, tooth short and simple at tip; submentum with a row of 12 setae; labial palpomere 2 much longer than 3 (1.3 times), bisetose on inner margin, without additional setae; maxillary palpomere 3 much longer than 4 (1.4 times) (Fig. 4A); antennae long and thin, extending to about 1/4 of elytra from apex; one pair of suborbital pores present. Prothorax distinctly expanded, propleura visible from above; pronotum elongate, as long as head excluding mandibles, wider than head, widest at about 1/3 from front, lateral margins sinuate before hind angles which is nearly rectangular, base slightly narrower than front; two pairs of latero-marginal setae present, disc moderately convex. Elytra ovate, shoulders obtuse, almost rounded, distinctly serrate at prehumeral part, while ciliate on other parts; disc extraordinarily convex though depressed near base; striae reduced though traceable; presence of two dorsal pores along the 3 rd striae and the preapical; prehumeral set of the marginal umbilicate pores not aggregated, the 5 th pore much closer to 4 th than to 6 th . Protarsi not modified in male; tibiae without longitudinal sulci. Ventrites IV-VI each with pair of paramedian setae; ventrite VII quadrisetose in both sexes.
Male genitalia (Fig. 5A, B). Aedeagus very short and small, but thick, weakly sclerotized. The median lobe slightly arcuate at median portion, but strongly sinuate before apex which is obtuse, with a large round opening; base quite large, without a sagittal aileron; inner sac provided with a thick and long copulatory piece, which is about 2/5 as long as aedeagus; in dorsal view, apical lobe gradually contracted towards apex which is broadly rounded; parameres well-developed, but much shorter than the median lobe, truncate at apical margin, each armed with four long setae at apex.
Remarks. This peculiar species was put into the genus Qianotrechus Uéno, 2000 due to the lack of a male at that time. However, Uéno (2003) pointed out the following characteristics of this species which are not present in the congeners of Qianotrechus: body wholly pubescent; humeral margins of elytra strongly serrated; and the 5 th pore of marginal umbilicate series forwardly and inwardly shifted, widely distant from the 6 th pore. Hence, he mentioned that the above peculiarities may suggest a generic separation of this species from the Guizhou genus. Our examination of male individuals provided further evidence to support his opinion. First, protarsi are not modified in the male of Qianotrechus fani, while the 1 st and 2 nd protarsomeres are spurred inwards at the apices in all other Qianotrechus. Second, ventrite VII is quadrisetose in both sexes in Qianotrechus fani, vs. bisetose in males of other Qianotrechus. Third, the aedeagus of Qianotrechus fani is very small and stout, not the same type as in other Qianotrechus species, which are always large and elongate (Uéno 2000(Uéno , 2003.
Etymology. "Ueno"+ "-aphaenops". Dedicated to the late Dr Shun-Ichi Uéno who made a great contribution to the knowledge of Chinese subterranean ground beetles. Gender masculine.
Generic range. China (Sichuan) (Fig. 2). A monospecific genus only recorded from the cave Hua'er Dong, Gulin County, southeastern Sichuan. (Uéno, 2003)  Remarks. Uéno (2003) mentioned that the submentum of Qianotrechus fani is 8-setose. Actually, there are 12 setae in total in our exemplars, excluding the shorter pubescence along the site of labial suture.   (Uéno, 2003), comb. nov., female B ventral head of Chu pheggomisetoides gen. nov. & sp. nov., female C-e elytral chaetotaxy of Uenoaphaenops fani (Uéno, 2003), comb. nov., female, Chu pheggomisetoides gen. nov. & sp. nov., female paratype, and Boreaphaenops liyuani sp. nov., female holotype. Scale bars: 1.0 mm. Generic characteristics. Medium-sized, somewhat similar to the Balkan genus Pheggomisetes Knirsch, 1923 in appearance especially head and pronotum (Fig. 7); anophthalmic and depigmented; body moderately elongate, with rather thin and slender appendages. Head strongly expanded laterally and convex though shorter than long, two pairs of supraorbital setiferous pores present; frontal furrows long and wellmarked; labrum widely emarginated at front, mandibles widened and developed, apices strongly hooked, right mandibular tooth tridentate; labial suture visible at side, completely disappeared medially (Fig. 4B); mentum bisetose, base largely concave, submentum 8-setose; antennae thin and very long, extending over apices of elytra. Propleura invisible from above; pronotum subcordate, transverse, hind angles very sharp and distinctly protruded backwardly which is similar in Pheggomisetes, only presence of the anterior pair of latero-marginal setae. Elytra elongated ovate, twice as long as wide, much longer than fore body; prehumeral angles rounded off; lateral margins well-bordered throughout, finely ciliate on shoulders, whereas smooth on other parts; disc moderately convex, striae noticeable though distinctly reduced; two pairs of dorsal and the preapical setiferous pores present; the humeral group of the marginal umbilicate pores not aggregated, the 1 st pore inwardly shifted to the site of 7 th stria, only the 2 nd pore closest to marginal gutter, 4 th shifted posteriad; 5 th and 6 th pores closely spaced (Fig. 4D). The 1 st and 2 nd protarsomeres modified in male, distinctly widened and bluntly denticulate inward at apices, and with spongy setae ventrally. Ventrite VII with one pair of apical setae in male, whereas two pairs in female. Male genitalia with median lobe almost straight, suddenly widened at apical part; in lateral view, apex notched dorsally (Fig. 5C, D).

Uenoaphaenops fani
Remarks. Although Chu gen. nov. resembles the Balkan cavernicolous genus Pheggomisetes Knirsch, 1923(Knirsch 1923Vrbica et al. 2017) in the shape of head and pronotum, this must be a case of convergence because the faunas in the Balkan Peninsula and China are completely different. Indeed, there are many cases of large gaps in cave trechines between Europe and China, e.g., Doderotrechus from Western Italy vs. Trechus of the dacaitranus group (Trechus bastropi) from Tibet (Faille et al. 2013). Apart from the similarities of the head and pronotum, both Chu and Pheggomisetes are very different in many aspects including outlines of head, prothorax and elytra, and in particular the chaetotaxic pattern on head and elytra.
As the fauna of subterranean ground beetles are still not well known, the phylogenetic position of Chu gen. nov. among Trechini is unknown at present, like many other genera. Its peculiar characters, such as ellipsoidal head with deep emarginated labrum, stout mandible, subcordate pronotum with sharp and backwardly protruded hind angles, and almost straight median lobe which is enlarged and notched at the apex isolate Chu gen. nov. from all other Chinese trechines. Beside comparative morphological study, evidence from molecular analysis would be valuable in determining its position.
Etymology. "Chu" means "the first time" in Chinese, suggesting that this species was the first subterranean beetle discovered by Li He (the second author). Gender masculine.
Generic range. China (Sichuan) (Fig. 2 Diagnosis. Medium-sized troglobitic beetles, eyeless and lacking pigmentation, somewhat similar to a Pheggomisetes species of Bulgaria and Serbia in Balkan Peninsula due to its convex head and subcordate pronotum with very sharpened hind angles.
Description. Length: 6.0-6.5 mm; width: 1.5 mm. Habitus as in Fig. 7. Body yellow or brown, but antennae, palps and tarsi paler; surface glabrous and smooth though genae sparsely setose and elytra covered with a few, minute, pubescence on lateral margins. Underside of head with a few sparse setae, of thorax and abdominal ventrites glabrous. Microsculpture engraved meshes more or less polygonal on head and pronotum, and irregularly and densely striate on elytra.
Elytra much longer than fore body including mandibles, much longer than wide, EL/EW = 1.90-2.02; much wider than pronotum, EW/PrW = 1.65-1.67; base unbordered, prehumeral part widely rounded, lateral margins finely but well-bordered throughout, widest at about middle, gently and gradually contracted towards base and apices; disc moderately convex though slightly depressed on each elytron near base; striae faint but noticeable; basal pore present at side but behind of scutellum, anterior and posterior dorsal pores along the 3 rd stria located at about basal 1/5 and apical 2/5 of elytra respectively, preapical pore at about apical 1/8 of elytra, much closer to suture than to apical margin; locations of the marginal umbilicate pores as in Fig. 4D.
Legs densely pubescent; the 1 st tarsomere much, and slightly shorter than 2 nd -4 th combined in fore and middle legs, respectively, whereas as long as in hind ones; tibiae without longitudinal sulci.
Ventrites pubescent; IV-V each with two pairs, VI with three pairs of paramedian setae, and several additional setae which are much shorter; VII bisetose in male, while quadrisetose in female.
Male genitalia (Fig. 5C, D). Median lobe and parameres long and thin, suddenly curved at basal one fourth, then nearly straight towards apex. Basal opening small, without a sagittal aileron; inner sac provided with a long copulatory piece, which is about 1/3 as long as aedeagus; in dorsal view, apical lobe suddenly narrowed before the enlarged apex which is broadly rounded; each paramere armed with four long setae at apex.
Etymology. Refers to the similarity of this new species with a Pheggomisetes species from Balkans.
The exemplars of Chu pheggomisetoides gen. nov. & sp. nov. were collected under a stone at the water edge in the innermost main passage in the cave (Fig. 8A-C). In addition to the four ground beetle species mentioned above, other animals found in Hanwang Dong are a Pseudonesticus spider, a Nepalella millipede, a Gammarus amphipod, bats, crickets and diplurans (Fig. 8D-I). Diagnosis. An aphaenopsian, small-sized beetle, eyeless and depigmented, body distinctly elongate, with thin and long appendages, densely pubescent on head and elytra, presence of only a dorsal setiferous pore along the 3 rd stria on each elytron.
Description. Length: 5.2 mm, width: 1.3 mm. Habitus as in Fig. 9. Body brown, but antennae, palps and tarsi paler; head and elytra covered with dense pubescence, pronotum glabrous. Underside of head with a few sparse setae, of thorax and abdominal ventrites glabrous. Microsculpture engraved meshes more or less isodiametric on head, strongly transverse on pronotum and densely striate on elytra.
Elytra longer than fore body including mandibles, much longer than wide, EL/ EW = 1.94; nearly twice as wide as prothorax, EW/PrW = 1.96; base unbordered; similar in B. angustus but devoid of humeral angles, lateral margins finely but wellbordered throughout, smooth; widest at about middle, gently contracted towards base but strongly to apices; disc moderately convex though depressed near base just behind basal pores; striae faint but well-indicated from the 1 st to 4 th ; basal pore present at sides of scutellum, only a median dorsal pore present along the 3 rd stria at a little behind middle; preapical pore present at about apical 1/7 of elytra, much closer to suture than to apical margin; marginal umbilicate pores well-marked, 2 nd closer to marginal gutter than others, prehumeral set (1 st to 4 th ) equidistantly located (Fig. 4E).
Legs densely pubescent; 1 st tarsomere much and slightly shorter than 2 nd -4 th combined in fore and middle legs, whereas as long in hind ones; tibiae without longitudinal sulci. Abdominal ventrite IV-VI each with two pairs of paramedial setae, ventrite VII quadrisetose.
Male. Unknown. Etymology. In honour of Mr. Yuan Li (Deyang, Sichuan), a co-collector of the type material.
Remarks. The cave Hanwang Dong is about 400 km in a straight line from Lengre Dong, the locality of B. angustus Uéno, 2002, though both localities belong to same range of the Daba-Micang Mountains. Although B. liyuani sp. nov. has several differences from B. angustus which are probably of generic importance, e.g. completely fused mentum and submentum (labial suture visible in the latter species), thin and straight mandibles with tooth distinctly reduced (well-developed in B. angustus), smooth elytral lateral margins (ciliate in B. angustus), and very long 2 nd labial palpomere which is 1.7 time as long as the 3 rd (such a feature never observed in other Chinese cave trechines), we prefer to describe it as a member of Boreaphaenops at present as only a single female exemplar is available. In addition, it also differs from B. angustus in having smaller body size, presence of only a pair of posterior supraorbital pores on the head instead of two, pronotum well-angulate on hind and fore angles instead of rounded, lack of prehumeral angles of elytra which have only a single dorsal setiferous pore along the 3 rd stria instead of three in B. angustus, and with equidistant prehumeral pores of the marginal umbilicate series, vs. 4 th pore far from 3 rd in B. angustus.

Diagnosis.
A troglophilous species though depigmented, macrophthalmic, body stout, with short appendages, developed frontal furrows on head, humeral set of the marginal umbilicate pores aggregated. Habitus as in Fig. 11.
Remarks. This species was formerly reported from two limestone caves in Chongqing Municipality (Deuve 1999;Deuve and Tian 2016). This is the first record in Sichuan Province.
Distribution. China (Chongqing and Sichuan) (Fig. 2). The exemplars of Agonotrechus sinotroglophilus Deuve, 1999 were collected under stone in the moist area about 100-200 m from the entrance in Hanwang Dong. Diagnosis. Medium-sized Jujiroa species, body depigmented, microphthalmic, head thin and slightly expanded at sides, antennae not extending to apices of elytra, fore angles of pronotum distinctly protruded, elytra mucronate at apices, striae finely punctate, presence of two dorsal pores along the 2 nd stria, tarsi smooth.
Description. Length: 15.0-15.5 mm; width: 4.5 mm. Habitus as in Fig. 12. Body concolorous yellow or brown, but a little darker on head, surface smooth and glabrous (though rough on sides and lateral margins of pronotum), moderately shiny. Microsculptural meshes finely and transversely striate on head, pronotum and elytra.
Head thin and elongate, much longer than wide, HLm/HW = 2.06-2.11, HLl/ HW = 1.53-1.48; widest just behind the level of eyes; genae convex, and slightly expanded at side; frontal furrows short and shallow, ending before the level of anterior supraorbital pores; two pairs of supraorbital pores present, anterior at about middle of head from labrum to neck, posterior about basal 2/7 of head; eyes very small and flat; clypeus bisetose, labrum bisinuate at front margin, 6-setose; mandibles elongated, teeth reduced; labial suture clear; mentum with two setae on each side just in front of the basal pits which are very small; median tooth short, about half as long as lateral lobes, bluntly bifid at tip; submentum with two setae on each side, inner ones longer; ligula short, widened and truncated at apical margin, bisetose; palpomeres long and slender, the 2 nd labial palpomere bisetose on inner margin, 1.2 times as long as 3 rd , the 3 rd maxillary palpomere as long as 4 th ; antennae filiform, thin and very long, extended to apical 1/10 (male) or 1/9 (female) of elytra, the 1 st to 3 rd antennomeres glabrous, each of the 1 st and 2 nd with a seta near apex, pubescent from the 4 th ; the 2 nd shortest, while 4 th longest; relative length of each antennomere compared with the 2 nd in the holotype as: the 1 st (2.50), 2 nd (1.00), 3 rd (2.50), 4 th (2.93), 5 th (2.58), 6 th (2.07), 7 th (2.29), 8 th (2.00), 9 th (1.88), 10 th (1.64) and 11 th (1.71).
Pronotum subcordate, transverse, PL/PW = 0.91-0.92, but a little longer than wide measured through fore angles; much wider but slightly shorter than head, PW/ HW = 1.09-1.12, PL/HLl = 0.86-0.96; widest at about 2/5 from front, lateral margins including front and hind angles widely and strongly reflexed throughout, gently and gradually narrowed towards hind angles which are nearly rectangular, fore angle extraordinarily and forwardly protruded, forming a obtuse lobe; basal foveae short but  well-marked; only basal latero-marginal setae present, inserted just on the hind angles; entire lateral margins and front without borders, base finely bordered, slightly narrower than front including front angles, PbW/PfW = 0.87-0.88; both base and front nearly straight. Scutellum small. Elytra elongate, amygdaloid, much longer than wide, EL/EW = 1.80-1.89; distinctly longer than forebody including mandibles, much wider than pronotum; base well-bordered (but unbordered against the 1 st interval), shoulders nearly rounded; widest at about middle of elytra, apex distinctly protruded, mucronate; disc convex, marginal depressions well-defined and reflexed throughout, the 9 th interval suddenly deepened and distinctly curved at about basal 1/4; striae entire, impressed by small but deep punctures, intervals almost flat; scutellar striole short; basal pores present; the 3 rd interval with two setiferous pores close to 2 nd stria at about apical 1/5 and 3/7 of elytra respectively; three pores present on 7 th stria posteriorly; an apical pore present at apical anastomosis of the 1 st and 4 th striae; presence of 23-24 marginal umbilicate pores throughout, continuous (Fig. 13A).
Legs slender and elongate, procoxae asetose, mesocoxae unisetose, metacoxae trisetose (the inner setae present); each trochanter with a single seta; metafemur unisetose posteriorly; tibiae and tarsi smooth, without longitudinal sulci or striae externally; the 4 th tarsomere bilobed in fore and middle legs, deeply emarginated in hind ones; protarsi not modified in male, but 1 st -3 rd each with two spongy setae on ventral surface.
Male genitalia (Fig. 14A-D). Median lobe of aedeagus very slender and elongate, gently arcuate in middle portion, then gradually narrowed towards apex which is bluntly pointed; base moderately opened, presence of a small sagittal aileron; parameres developed. In lateral view, apical lobe thin, slightly longer than wide.
Remarks. Similar to Jujiroa zhouchaoi Tian & He, 2020 and J. satoi Uéno, 2005, but having much longer antennae and distinctly mucronated apices on the elytra. In addition, it is easily distinguished from J. zhouchaoi by a broader head, flat intervals and large punctate striae of the elytra and from J. satoi by a slenderer body with a thin head, and the presence of dorsal pores on the elytra. Furthermore, Jujiroa uenoi sp. nov. has a peculiar character state: presence of an inner seta on each metacoxa, which is absent in other species of Jujiroa.
Etymology. Dedicated to the late Dr Shun-Ichi Uéno, Science Museum (Natural History), Tokyo.
Cave Banche Dong is about 1.6 km away in a straight line from Xiaodouyan Tiankeng (硝斗岩天坑), which is a well-known touristic site in Leshan. The opening of the entrance is so narrow that it allows only one person to crawl in at a time (Fig. 15A). The interior of the cave is small and moist (Fig. 15B). The two individuals of Jujiroa uenoi sp. nov. were found running on the ground inside cave (Fig. 15C-D). Other animals observed in the cave are Leopoldamys rats, crickets, moths and Serriphaedusa snails (Fig. 15E-H Diagnosis. A small-sized Jujiroa species, depigmented, body and appendages elongate, microphthalmic, head thin and slightly expanded medially, fore angles of pronotum moderately protruded, elytral striae largely punctate, mucronate at apices, absence of dorsal pores, tarsi longitudinally sulcate. Description. Length: 12.5 mm; width: 3.6 mm. Habitus as in Fig. 16. Body concolorous yellow but a little darker on head, surface smooth and glabrous (though rough on sides and lateral margins of pronotum), moderately shiny. Microsculptural meshes transversely and densely striate on head, pronotum and elytra. Head thin and elongate, much longer than wide, HLm/HW = 2.00, HLl/HW = 1.48; widest exactly at the eyes location; frons nearly flat, vertex strongly convex medially, neck constriction wide; genae convex, and slightly expanded at side; frontal furrows short and shallow, ending before the level of anterior supraorbital pores; two pairs of supraorbital pores present, anterior near inner margin of eye; eyes very small and flat; clypeus bisetose, labrum bisinuate at front margin, 6-setose; mandibles elongate, teeth reduced; labial suture clear; mentum with two setae on each side, basal pits small; median tooth short, half as long as the lateral lobes, bifid at tip; submentum with two setae on each side, inner ones much longer; ligula short, widened and truncated at apical margin, bisetose; palpomeres long and slender, the 2 nd labial palpomere bisetose on inner margin, 1.2 times as long as 3 rd , the 3 rd maxillary palpomere slightly longer than 4 th ; antennae filiform, thin and very long, extended to apices of elytra, the 1 st to 3 rd antennomeres glabrous, the 1 st and 2 nd with a seta near apex, pubescent from the 4 th ; the 2 nd shortest, while 5 th longest; relative length of each antennomere compared with 2 nd antennomere in the holotype as follows: the 1 st (1.88), 2 nd (1.00), 3 rd (2.07), 4 th (2.89), 5 th (2.76), 6 th (2.89), 7 th (2.35), 8 th (2.14), 9 th (2.00), 10 th (1.57) and 11 th (1.64).
Pronotum subcordate, nearly as long as wide, PL/PW = 0.98; wider but slightly shorter than head, PW/HW = 1.38, PL/HLl = 0.88; widest at about 2/5 from front, lateral margins including front and hind angles widely reflexed throughout, gently and gradually straight towards hind angles, fore angles roundly and moderately protruded forwardly, hind angles rectangular; basal foveae large and shallow; only basal lateromarginal setae present, inserted on the hind angles; entire lateral margins and front without borders, base finely bordered, slightly wider than front, PbW/PfW = 1.10; both base and front nearly straight. Scutellum small, short.
Elytra elongate, amygdaloid, much longer than wide, EL/EW = 2.01; distinctly longer than forebody including mandibles, much wider than pronotum; base wellbordered (but interrupted against the 1 st interval), shoulders nearly rounded; widest at about 4/7 of elytra from base, apex sharply protruded, distinctly mucronate; disc convex, striae entire, impressed by large and nearly rounded punctures; scutellar striole short; basal pores present; without setiferous pore on the 3 rd interval, and absence of the preapical pore; two pores present on 7 th stria posteriorly; an apical pore present on each elytron; marginal umbilicate pores present throughout, continuous (Fig. 13B).
Male. Unknown. Remarks. More or less similar to J. deliciola Uéno & Kishimoto, 2001 (from two caves in Xingwen County, Yibin, southern Sichuan) (Uéno and Kishimoto 2001;Tian and He 2020) in having a thin and elongate body, and distinctly mucronate elytral apices, but J. wangzheni sp. nov. is easily recognized by a less shiny and less glabrous body, widened elytra base, strongly convex intervals and largely punctate striae of elytra which are devoid of dorsal pores on 3 rd elytral interval and without preapical pores.
Etymology. The new species is dedicated to Mr. Zhen Wang (Chengdu, Sichuan), a co-collector of the type exemplars.
The specimens of J. wangzheni sp. nov. were collected by baited traps in a chamber at about 30-50 m inside of the left entrance of Hua'er Dong. The species is sympatric with Uenoaphaenops fani (Uéno, 2003) (Fig. 6E).
Key to species of the genus Jujiroa Uéno, 1952 from Sichuan Province