Jujiroa wangzheni, Tian & He, 2020

Tian, Mingyi & He, Li, 2020, A contribution to the knowledge of cavernicolous ground beetles from Sichuan Province, southwestern China (Coleoptera, Carabidae, Trechini, Platynini), ZooKeys 1008, pp. 61-91 : 61

Jujiroa wangzheni sp. nov. Chinese name: 王震穴胫步甲 Figs 2 , 6 , 13B , 16

Material.

Holotype: female, cave Hua’er Dong, Xiangdingshan, Xiangding, Shiping, Gulin, Luzhou, Sichuan (四川省泸州市古蔺县石屏镇向顶村象顶山华儿洞), 28.028931°N, 106.00716°E, 640 m, 2020-XI-24, leg. Yuan Li & Zhen Wang, in SCAU. Paratype: 1 female, idem, in SCAU.

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 2nd labial palpomere bisetose on inner margin, 1.2 times as long as 3rd, the 3rd maxillary palpomere slightly longer than 4th; antennae filiform, thin and very long, extended to apices of elytra, the 1st to 3rd antennomeres glabrous, the 1st and 2nd with a seta near apex, pubescent from the 4th; the 2nd shortest, while 5th longest; relative length of each antennomere compared with 2nd antennomere in the holotype as follows: the 1st (1.88), 2nd (1.00), 3rd (2.07), 4th (2.89), 5th (2.76), 6th (2.89), 7th (2.35), 8th (2.14), 9th (2.00), 10th (1.57) and 11th (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 latero-marginal 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 well-bordered (but interrupted against the 1st 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 3rd interval, and absence of the preapical pore; two pores present on 7th stria posteriorly; an apical pore present on each elytron; marginal umbilicate pores present throughout, continuous (Fig. 13B ).

Legs very thin and slender, procoxae asetose, mesocoxae unisetose, metacoxae bisetose (without inner setae); each trochanter with a single seta; metafemur bisetose posteriorly; tibiae and tarsi smooth, without longitudinal sulci externally; the 4th tarsomere bilobed in fore and middle legs, while deeply emarginated in hind ones.

Ventral surface smooth and glabrous. Each abdominal ventrite IV-VI bisetose, ventrite VII, quadrisetose.

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 3rd 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.

Distribution.

China (Sichuan). Known from the cave Hua’er Dong in Gulin County, southeastern Sichuan (Fig. 2 ).

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 ).

Figures

Figure 2. Map of Sichuan Province showing the locations of the related caves.

Figure 6. Cave Hua'er Dong, the type locality of Uenoaphaenops fani (Ueno, 2003), comb. nov. and Jujiroa wangzheni sp. nov. A-C environs of the cave, left (yellow arrow) and right (red arrow) entrances D entrance to the right E a running individual of Jujiroa wangzheni sp. nov. in cave. (A-D by courtesy of Yuan Li).

Figure 13. Elytral chaetotaxy of Jujiroa species A J. uenoi sp. nov., male holotype B J. wangzheni sp. nov., female holotype.

Figure 16. Habitus of Jujiroa wangzheni sp. nov., male holotype.