Pterostichus (Huaius) hanwang, Tian & He, 2020

Tian, Mingyi & He, Li, 2020, New species and new record of cavernicolous ground beetles from Sichuan Province, China (Coleoptera: Carabidae: Pterostichini and Platynini), Zootaxa 4881 (3), pp. 545-558 : 552-555

Pterostichus (Huaius) hanwang sp. nov.

(Chinese name: ỡŦúãṃm)

Figs. 6–10

Material. Holotype: male, cave Hanwang Dong, Zhongbai, Zengjia , Chaotian , Guangyuan , Sichuan (HnjờỮ KḿfikṽǎẍüϕffifflỡŦḆ), 32°34′40.14″N, 106°6′25.32″E, 1210 m, IX-22-2018, leg. Li He, in SCAU . Paratypes (12): 1 male, 1 female, idem holotype, in SCAU ; 1 male, idem holotype, in CHL ; 1 male, same collection data except IV-5-2018, in CHL ; 1 male, 1 female, same collection data except VI-6-2020, leg. Li He, Yuan Li & Yimei Wen, in SCAU ; 3 males, 1 female, same collection data except VI-6-2020, leg. Li He, Yuan Li & Yimei Wen, in CHL ; 2 males, same collection data except VI-6-2020, leg. Li He, Yuan Li & Yimei Wen, one in CCZ and one in CYL . 1 male, spare in ethanol, SCAU .

Diagnosis. Similar to P. (Huaius) yuae Tian and Chen, 2019 (in Tian et al. 2019), but slightly stouter. Upper surface smooth and glabrous, except pronotum punctate in and near the basal foveae; body strongly shiny, light brown, with antennae, mouthpart palpi and tarsi light reddish brown.

Description. Length: 11.5–12.5 mm; width: 3.1–3.2 mm. Habitus as in Fig. 6 .

Head slightly widened, HLm/LW = 1.36–1.39, HLl/LW = 1.10–1.18; neck short, anterior and posterior supraorbital setiferous pores at about middle and about apical 5/6 of head respectively; clypeus bisetose; mentum tooth short, bluntly bifid at apex; mentum bisetose, submentum quadrisetose ( Fig. 7A, C ).

Pronotum quadrate, transverse, PL/PW = 0.86–0.92; lateral margins evidently not sinuate before hind angles (but convergent and relatively straight); PL/HLm = 0.74–0.76; PW/HW = 1.19–1.23; widest at about 1/5 of pronotum from front; fore angles porrect, widely rounded, hind angles bluntly rectangular ( Fig. 7A ).

Elytra much longer than wide, EL/EW = 1.85, EW/PW = 1.26–1.28; widest at about 2/3 from base; umbilicate marginal series composed of 15–17 pores on each elytron; two dorsal pores present on interval 3, all close to stria 2, at about middle and 3/4 of elytra respectively from base; scutellar striole absent.

Hind coxa trisetose; each femur in all legs with two setae posterio-ventrally. Prosternal process blunt at apex; metepisternum with outer upper angle acute; ventrites smooth, ventrites IV–VI bisetose, ventrite VII bisetose in male, quadrisetose in female.

Male genitalia ( Fig. 8 ): Similar to P. caoi Tian and Ding, 2019 (in Tian et al. 2019), but strongly bisinuate on ventral side, and apex sharp instead of blunt in lateral view.

Female genitalia ( Fig. 9 ): Gonosubcoxite with four setae along outer margin; gonocoxite faintly bent outwards, with longer ensiform setae on outer margin; bursa copulatrix wide, simply saccate, evidently folded; oviduct situated in middle position, spermathecal gland large and long, spermatheca short.

Remarks. Similar to P. (Huaius) yuae Tian and Chen (in Tian et al. 2019), but median tooth bluntly bifid at apex, instead sharply bifid ( Fig. 7C, D ); pronotum wider, lateral margins not sinuate before hind angles ( Fig. 7A, B ); and elytra without scutellar striole.

Etymology. Refers to the type locality.

Distribution. China (Sichuan). Known only from the cave Hanwang Dong in Guangyuan ( Fig. 10 ).

The cave Hanwang Dong is located at the base of a limestone mountain, with a large entrance ( Fig. 10A ) and a large main passage. The main passage extends inward along a stream. It is a beautiful cave with spectacular scenery inside ( Fig. 10B, C ). Individuals of P. hanwang sp. nov. were collected under stone in the moist and gravelly areas about 100–400 m from the entrance ( Fig. 10 D–G). The cave holds a rich fauna. Apart from P. hanwang , many other cave animals are also living in this cave, such as three trechines, bats, millipedes, spiders, moths, diplurans, amphipods and snails.

P. hanwang sp. nov. is the first troglobitic pterostichine recorded from Sichuan Province.

Figures

FIGURE 6. Habitus of Pterostichus (Huaius) hanwang sp. nov., male, holotype.

FIGURE 7. Head and pronotum (A, B) and labium (C, D) of Pterostichus (Huaius) species. A and C Pt. (H.) hanwang sp. nov.; B and D Pt. (H.) yuae Tian et Chen, 2019

FIGURE 8. Male genitalia of Pterostichus (Huaius) hanwang sp. nov. A median lobe and parameres, lateral view B apical lobe, dorsal view.

FIGURE 9. Female genitalia of Pterostichus (Huaius) hanwang sp. nov. co common oviduct; bc bursa copulatrix; sp spermatheca; sd ductus of spermatheca; sg spermathecal gland; sgd ductus of the spermathecal gland; gscx gonosubcoxite; gcx gonocoxite.

FIGURE 10. Cave Hanwang Dong, the type locality of Pterostichus (Huaius) hanwang, sp. nov. A, entrance; B, C, spectacular scenery inside the cave; D, the moist and gravelly areas in cave, showing the habitat where the beetles were collected; E, a running individual of P. hanwang, sp. nov. in cave; F, the original state of the beetles when the stone was turned over; G, two individuals of P. hanwang, sp. nov. were collected in a test tube.