Thoracostrongylus baishanzuensis, Xia & Tang & Schillhammer, 2022

Xia, Mei-Hua, Tang, Liang & Schillhammer, Harald, 2022, Review of Chinese species of the genus Thoracostrongylus Bernhauer, 1915 (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 1131, pp. 99-134 : 99

Thoracostrongylus baishanzuensis sp. nov.

Figs 80-85 , 119 百山祖钝胸隐翅虫

Type material.

Holotype. China - Zhejiang Prov. • ♂, glued on a card with labels as follows: "China: Zhejiang, Qingyuan, Baishanzu N.R.; 27°45'26"N, 119°12'08"E; alt. 1730 m; 02 May 2014; Peng, Song, Yan & Yu leg." "Holotype / Thoracostrongylus baishanzuensis / Xia, Tang & Schillhammer" [red handwritten label]; SHNU. Paratypes. China - Zhejiang Prov. • 6♂♂, 2♀♀; same data as for the holotype; SHNU • 1♂, 1♀; Qingyuan, Baishanzu N.R.; 27°45'14"N, 119°11'55"E; alt. 1560-1750 m; 01 May 2014; Peng et al. leg.; SHNU • 1♂, 4♀♀; Lishui City, Qingyuan County, Baishanzu, Station to Peak; 27°45'20"N, 119°11'78"E; alt. 1721 m; 22 May 2015; Song & Yan leg.; SHNU • 1♂, 2♀♀; Lishui City, Qingyuan County, Baishanzu, Station to Peak; 27°45'20"N, 119°11'78"E; alt. 1721 m; 24 April 2015; Song & Yan leg.; SHNU • 1♀; Lishui City, Qingyuan County, Baishanzu; alt. 1500 m; 22-23 September 2008; Tang & Zhang leg.; SHNU.

Diagnosis.

The new species can be easily recognized by the combination of following characters: legs reddish yellow without dark markings, head slightly wider than or as wide as elytra, apical portion of median lobe of aedeagus (Figs 82-85 ) curved dorsad into a fin-shape, paramere bilobed.

Measurements.

Male: BL: 7.8-8.6 mm, FL: 4.3-4.9 mm. HL: 1.22-1.39 mm, HW: 1.72-1.95 mm, CL: 0.83-0.89 mm, PO: 0.28 mm, PL: 1.56-1.78 mm, PW: 1.33-1.50 mm, EL: 1.72-1.95 mm, EW: 1.72-1.95 mm. HL/HW: 0.71-0.74, CL/PO: 3.00-3.20, PL/PW: 1.15-1.23, EL/EW: 1.00, HW/EW: 1.00-1.03, PW/EW: 0.77-0.79, HW/PW: 1.26-1.31. Female: BL: 8.3-9.2 mm, FL: 4.7-5.2 mm. HL: 1.39-1.45 mm, HW: 1.95-2.06 mm, CL: 0.89-0.95 mm, PO: 0.28 mm, PL: 1.72-1.78 mm, PW: 1.45-1.61 mm, EL: 1.89-1.95 mm, EW: 1.89-2.00 mm. HL/HW: 0.68-0.71, CL/PO: 3.20-3.40, PL/PW: 1.10-1.19, EL/EW: 0.94-1.00, HW/EW: 1.00-1.03, PW/EW: 0.75-0.81, HW/PW: 1.28-1.35.

Description.

Forebody dark brown with a bronze tint, abdominal segments III and IV reddish brown, remaining segments gradually becoming darker apicad, labrum reddish brown, mandibles reddish brown with medial portions distinctly darker, maxillary and labial palpi reddish brown, antennae reddish brown, antennal club indistinctly darker, legs reddish brown without dark markings, elytra with few small patches of whitish pubescence, scutellum with black pubescence in apical half, abdominal tergites III-VII each with triangular mediobasal golden tomentose patch delimited by pair of dark tomentose spots, dark tomentose spots of tergites III and IV indistinct, dark tomentose spots of tergite V particularly large and dark, confluent apically, forming sagittate patch, dark tomentose spots of tergite VI similar to that of tergite V, but little smaller and distinctly lighter, dark tomentose spots of tergite VII indistinct.

Head slightly wider than or as wide as elytra; vertex with small longitudinal specular spot medially; surface densely covered with umbilicate punctures except specular median spot. Antennae with antennomere 1 longest, antennomeres 2 and 3 almost half as long as antennomere 1, antennomeres 4 and 5 longer than wide, antennomeres 6-10 gradually increasing in width and decreasing in length, antennomere 10 slightly longer than or as long as wide, antennomere 11 distinctly longer than wide, asymmetrical and subacuminate towards tip.

Pronotum widest behind anterior angles; punctation dense and umbilicate, very short and narrow impunctate midline in posterior quarter, pubescence golden, distinct on entire dorsal surface.

Elytra subquadrate, inconspicuously wider than long, slightly dilated posteriad; surface densely and finely, regularly punctate, with brassy pubescence, mixed with grey spots all over the disc. Scutellum triangular, finely and densely punctate, with black, velvety pubescence.

Abdomen with tergites densely punctate; tergites III-VII brown, tergite VII with apical palisade fringe.

Male. Sternite VIII with medio-apical emargination. Aedeagus (Figs 82-85 ) relatively stout, median lobe gradually narrowed apicad in apical fourth in ventral view, in lateral view, apical portion of median lobe curved dorsad forming distinct fin-shape; paramere very long, gradually widened apicad, apex bilobed, each lobe with five to six setae around apical margin.

Female. Sternite VIII with posterior margin entire.

Distribution.

China (Zhejiang).

Etymology.

This species is named after the type locality, Baishanzu, in Zhejiang Province, China.

Figures

Figures 80 - 85. Thoracostrongylus baishanzuensis sp. nov. 80, 81 habitus 82 - 85 aedeagus, ventral (82, 83) and lateral (84, 85) views. Scale bars: 1 mm (80, 81); 0.2 mm (82 - 85).

Figures 108 - 122. Distribution map of Thoracostrongylus species of China 108 T. acerosus 109 T. aduncatus 110 T. birmanus 111 T. diaoluoensis 112 T. formosanus formosanus 113 T. formosanus flavipes 114 T. fujianensis 115 T. malaisei 116 T. miyakei 117 T. sarawakensis 118 T. velutinus 119 T. baishanzuensis 120 T. bicolor 121 T. brachypterus 122 T. chrysites. Triangle, localities of specimens examined in this paper; square, localities of specimens listed in previous papers. Red, doubtful localities; blue, trustede localities.