Tachinus (Tachinoderus) tangliangi Chang, Li, Yin & Schülke, new species

Chinese Common Name: 汤氏圆胸隐翅虫

(Figs 10–11, 12)

Type material (9 exs). Holotype: CHINA: Ƌ: ‘ China: Yunnan, Jinghong, Nanbanhe Nature Reserve (纳版河自然 保护区), Xiao-nuo-you-shang-zhai (小糯有上寨), 6.i.2004, Li & Tang leg.’ (SNUC) . Paratypes: CHINA: 1 ♀: same label date as Holotype (SNUC); 1 ♀: also from Xiao-nuo-you-shang-zhai, except ‘alt. 1600 m, 07.v.2009, Jia-

Yao Hu & Zi-Wei Yin leg.’ (SNUC); THAILAND: 1 Ƌ: ‘ THAILAND [58]— Doi Pha Hom, Huay Nam Saw, 20°04’N, 99°11’E, 1530 m, along stream, 23.I.2014 , leg. Ob’ (cAss); 1 ♂, 1 ♀: ‘ THAILAND [43]— Doi Pha Hom Pok, Tad Luang waterf., 19°52’N, 99°07’E, 1100 m, 27.i.2014 , leg. Ob’ (♂ in cSch, ♀ in cAss); 1 ♂, 1 ♀: ‘ THAILAND [37]— Doi Inthanon, Khun Huay Hang, 18°34’N, 98°31’E, 1290 m, along stream, 11.I.2014 , leg. Ob’ (♂ in cAss, ♀ in cSch); 1 ♀: ‘ THAILAND [34]— Doi Inthanon, routeto Mae Wang, 18°35’N, 98°31’E, 1580 m, 9.I.2014 , leg. Ob’ (cAss).

Diagnostic description. Male. Habitus as in Fig. 10A; TBL 3.90 mm, FBL 2.36 mm; head black, pronotal disc, elytra and abdomen reddish-brown, antennomeres I–II, XI, mouthparts, pronotal posterolateral areas, and most parts of legs yellowish-brown. Head sub-triangular, HL 0.42 mm, HW 0.71 mm, with finely punctures in posterior portion; eyes prominent, EyL 0.14 mm; antenna elongate, AnL 1.98 mm, relative lengths of antennomeres I–XI: 1.25: 1: 1.5: 1.25: 1.25: 1.25: 1.25: 1.25: 1: 1: 1.5. Pronotum distinctly transverse, PL 0.71 mm, PW 1.27 mm, PI 0.56. Elytra slightly transverse, EL 1.08 mm, EW 1.22 mm, EI 0.88. Abdominal surface with microsculpture consisting of transverse waves; tergite VIII (Fig. 11A) with four relatively long lobes, inner lobes much longer than outer ones; sternite VII (Fig. 11B) shallowly and broadly emarginate at middle along posterior margin, granules evenly arranged in sub-semicircular area; sternite VIII (Fig. 11C) with four lobes, deeply incised between inner lobes, median length of sternite 0.64 times as long as depth. Length of aedeagus (Fig. 11 D–E) 0.70 mm, parameres long and thin, slightly curved ventrally in lateral view, median lobe truncate at apex.

Female. General habitus (Fig. 10B) similar to male. Measurements: TBL 3.77–4.24 mm, FBL 2.40–2.68 mm, HL 0.42–0.47 mm, HW 0.66–0.75 mm, EyL 0.14–0.19 mm, AnL 1.88–2.12 mm, PL 0.71–0.75 mm, PW 1.22–1.32 mm, PI 0.57–0.58, EL 0.99–1.18 mm, EW 1.22–1.32 mm, EI 0.81–0.89. Tergite VIII (Fig. 11F) with four lobes, inner lobes slightly longer than outer ones, incision between inner lobes deep V-shaped, sternite VIII (Fig. 11G) with six lobes, fimbriate lobes longer than others.

Comparative notes. As stated above, the new species is similar to T. curvipennis and T. drescheri in sharing elongate and thin parameres of the aedeagus. It differs from T. curvipennis in the slightly shallower incisions between the inner and outer lobes, and a much broader incision between the inner lobes of male sternite VIII; from T. drescheri in the much shallower median emargination of male sternite VII.

Distribution. China: Yunnan; Thailand: Chiang Mai (Fig. 12).

Etymology. The new species is dedicated to our colleague Liang Tang, who collected the male holotype.