Tachinus (Tachinoderus) centralis Chang, Li, Yin & Schülke, 2019

Chang, Yuan, Li, Li-Zhen, Yin, Zi-Wei & Schülke, Michael, 2019, A review of the Tachinus longicornis - group of the subgenus Tachinoderus Motschulsky (Coleoptera: Staphylinidae: Tachyporinae) from China, Zootaxa 4545 (4), pp. 478-494 : 482

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

Chinese Common Name: 华中圆胸隐翅虫

( Figs 3–4 , 12 )

Type material (25 exs). Holotype: CHINA: Ƌ: ‘ China: Shaanxi, Ningshaan (宁陕县), Qinling , Ping-he-liangding (平河梁顶), N33.28.386, E108.29.612, alt. 2107 m, 1.v.2008, Huang Hao & Xu Wang leg.’ ( SNUC) . Paratypes: CHINA: 1 Ƌ, 2 ♀♀: ‘ China: Shaanxi Prov., Hanzhong city (汉中市), Nanzheng Country (南郑县), Yuanba Town , Liping (黎平) National F.P., 32°50’N, 106°36’E, alt. 1400–1600 m, 16.vii.2012, Chen, Li, Ma & Zhao leg.’ ( SNUC) ; 1 ♂, 1 ♀: same label data, except ‘ Li Li-Zhen leg.’ ( SNUC) ; 1 ♀: same label date, except ‘ 15.vii.2012 ’ ( SNUC) ; 1 ♀: ‘ CHINA: (S-Shaanxi) Qinling Shan, river bank above Houzhenzi (厚畛子), 115 km WSW Xi’an, 1450 m, 33°50’N / 107°47’E (mixed deciduous forest, moss/leaves-sifted) 4.VII.2001 Wrase [06b]’ (cSch) ; 1 ♀: ‘ China: Shaanxi, Qin Ling Shan , 110.06 E, 34.27 N, Hua Shan Mt. N Valley, 1200-1400 m, 118 km E Xian, sifted, 18./ 20.08.1995, leg. A. Pütz’ (cPüt) ; 1 ♀: ‘ CHINA: Shaanxi Qinling Shan above Houzhenzi 115 km WSW Xi’an / 1450 m, 33°50’N 107°47’E 5.VII.2001 A. Smetana [C95b]’ (cSme) ; 1 ♀: ‘ CHINA: Shaanxi Qinling Shan pass rd. Zhouzhi Foping (周至佛坪) 105 km SW Xi’an / N-slope 1700 m 33°46’N 107°58’E 3.VII.2001 A. Smetana [C91]’ (cSme) ; 1 ♂, 1 ♀: ‘ CHINA: W-Hubei ( Daba Shan ) creek valley 8 km NW Muyuping (木鱼坪) 31°29’N, 110°22’E, 1550–1650 m, 18.VII.2001, leg. M. Schülke [CH01-16A] / creek valley, deciduous forest, moss (sifted) [ CH 01-16A]’ (cSch) ; 2 ♂♂, 1 ♀: ‘ China: Chongqing city, Chengkou Coun (城口县), Gaonan xiang (高楠乡), West Da-ba-Shan (西大巴山), Guo Di Tang (锅底凼), N32.08.300, E108.37.022, alt. 1830 m, 24.iv.2008, Huang Hao & Xu Wang leg.’ ( SNUC) ; 2 ♀♀: also from Gaonan xiang, except ‘ East Da-ba-Shan, upper Huang’an Gou (黄安沟), N31.51.785, E109.09.459, alt. 2039 m, 22–23.iv.2008, Huang Hao & Xu Wang leg.’ ( SNUC) ; 1 ♂, 2 ♀♀: ‘ China: Sichuan Prov., Bazhong city (巴中市), Nanjiang Coun (南江县), Micang shan (米仓山), Daxiaolan Gou (大小兰沟), N32.40.021, E106.54.578, alt. 1350 m, 29.iv.2008, Huang Hao & Xu Wang leg.’ ( SNUC) ; 2 ♂♂, 2 ♀♀: ‘ CHINA: SE Sichuan Jinfo Shan , 29°01’N 107°14’E, 1800 m, 27.VI.1998, A. Smetana [C72] / 1998 China Expedition J. Farkač, D. Král, J. Schneider & A. Smetana’ (1 ♂, 1 ♀ in cSme; 1 ♂, 1 ♀ in cSch) .

Diagnostic description. Male. Habitus as in Fig. 3A ; TBL 3.34–4.05 mm, FBL 2.07–2.36 mm; head black, pronotal disc, elytra, abdomen and most parts of legs reddish-brown, antennomeres I–IV, mouthparts, and tarsi yellowish-brown. Head sub-triangular, HL 0.38–0.47 mm, HW 0.66–0.71 mm, with fine punctures; eyes prominent, EyL 0.14 mm; antenna elongate, AnL 1.46–1.65 mm, relative lengths of antennomeres I–XI: 1.25: 1: 1.25: 1.25: 1.25: 1: 1: 1: 1: 1: 1.5. Pronotum strongly transverse, PL 0.6 6– 0.75 mm, PW 1.27–1.32 mm, PI 0.52–0.57. Elytra slightly transverse, EL 0.81–0.99 mm, EW 1.18–1.27 mm, EI 0.76–0.78. Abdominal surface with microsculpture consisting of transverse waves; tergite VIII ( Fig. 4A ) with four relatively long lobes, inner lobes much longer than outer ones; sternite VII ( Fig. 4B ) shallowly and narrowly emarginate at middle along posterior margin, granules sparsely arranged in sub-rectangular area; sternite VIII ( Fig. 4C ) with four lobes, deeply and broadly incised between inner lobes, median length of sternite 0.75 times as long as depth. Length of aedeagus ( Fig. 4 D–E) 0.60 mm, parameres short and broad, each slightly angulate at apex, strongly constricted at middle in lateral view.

Female. General habitus ( Fig. 3B ) similar to male. Measurements: TBL 3.63–4.0 mm, FBL 2.26–2.40 mm, HL 0.38–0.47 mm, HW 0.66–0.71 mm, EyL 0.14 mm, AnL 1.55–1.70 mm, PL 0.71–0.75 mm, PW 1.32–1.41 mm, PI 0.53–0.54, EL 0.94–1.08 mm, EW 1.27–1.37 mm, EI 0.74–0.79. Tergite VIII ( Fig. 4F ) with four lobes, inner lobes slightly longer than outer ones, with additional pair of processes along inner margins; sternite VIII ( Fig. 4G ) with six lobes, fimbriate lobes longer than others.

Comparative notes. Tachinus centralis is most similar to T. striatulus Ullrich , described based on a single female from northeastern Myanmar, in sharing an additional pair of processes along the inner margins of the inner lobes of female tergite VIII. Females of these two species can be tentatively separated by the incisions between the inner and outer lobes being distinctly deeper than that between the inner lobes, and the relatively much longer median and outer lobes of sternite VIII in the new species.

Distribution. China: Shaanxi, Hubei, Chongqing, Sichuan ( Fig. 12 ).

Etymology. The specific epithet indicates the distribution of this species in central China.

Figures

FIGURE 3. Habitus of Tachinus centralis. A. Male. B. Female. Scale bar: 1.0 mm.

FIGURE 4. Diagnostic features of Tachinus centralis (A–E. Male. F–G. Female). A, F. Tergite VIII. B. Sternite VII. C, G. Sternite VIII. D–E. Aedeagus, in ventral (D) and lateral (E) view. Scale bar 0.2 mm.

FIGURE 12. Distribution of the Chinese species of the Tachinus longicornis-group. Star—T. bilobus; Pentagon—T. centralis; Square—T. curvipennis; Diamond—T. lobutulus; Triangle—T. ohbayashii (red triangle represents published data, pink ones are new records); Circle—T. tangliangi (note this species also extends its distribution to northern Thailand).