Tachinus (s. str.) coronatus Feng, Li & Schuelke

Feng, Ting, Schuelke, Michael & Li, Li-Zhen, 2013, A taxonomic revision of the silphaeformis species-group of the genus Tachinus Gravenhorst (Staphylinidae, Tachyporinae) from China, ZooKeys 359, pp. 53-99 : 58-59

Tachinus (s. str.) coronatus Feng, Li & Schuelke sp. n. Figs 2A, 2B, 9C, 10C, 11C, 13C, 15C, 18C, 20C, 21C

Type locality.

China, Ningxia A. R., Jingyuan, Yehegu Valley.

Type material.

Holotype: ♂, CHINA: Ningxia A. R., Guyuan City, Jingyuan County, Xixia Forestry Station, Yehegu, alt. 1,900 m, 13.vii.2008, Zi-Wei YIN leg. (SNUC). Paratypes: 17 ♂♂, 22 ♀ ♀, same label data as the holotype (SNUC); 4 ♂♂, 2 ♀♀, CHINA: Ningxia A. R., Guyuan City, Jingyuan County, Fengtai Forestry Station, alt. 2,400 m, 26.vi.2008, Wen-Xuan BI leg. (SNUC); 1 ♂, 1 ♀, CHINA: Qinghai Prov., Xining City, Huzhu County, Beishan, alt. 2,450 m, 28.vii.2004, TANG, HU & ZHU leg. (SNUC); 23 ♂♂, 16 ♀♀, CHINA: Qinghai Prov., Xining City, Huzhu County, Beishan, alt. 2,750 m, 29.vii.2004, TANG, HU & ZHU leg. (SNUC); 14 ♂♂, 62 ♀♀, CHINA: Qinghai Prov., Yunning Si (Lamasery), 2,890 m, 36°45.6'N, 102°10.6'E, 1.-16.vii.2005, J. Hájek, D. Král & J. Růžička leg. (NMP, cSch).

Description.

Measurements of males (holotype): BL 3.67-3.73 (3.67); FL 3.06-3.17 (3.06) mm;PL 0.89-0.95 (0.89); EL 1.45-1.50 (1.50); SEL 0.11-0.17 (0.11); HW 0.83-0.89 (0.83); PW 1.44-1.46 (1.45); EW 1.61-1.67 (1.61); relative length of antennomeres I–XI: 21: 15: 15: 10: 14: 12: 13: 13: 13: 13: 25. Measurements of females: BL 4.17-4.45; FL 3.34-3.50; PL 0.99-1.01; EL 1.66-1.68; SEL 0.21-0.23; HW 0.89-0.95; PW 1.50-1.61; EW 1.83-1.89; relative length of antennomeres I–XI: 25: 15: 16: 9: 15: 14: 14: 14: 13: 13: 25.

Body (Figs 2A, 2B) dark brown to black; head and disc of pronotum black; elytra brown; mouthparts, basal four antennomeres, lateral margins of pronotum, small humeral spots on elytra, posterior margin of abdominal tergites and legs reddish brown.

Head slightly transverse, HW: PW = 0.55-0.62 (0.57); surface with fine microsculpture consisting of irregular striae, punctation moderately fine and sparse. Antennomeres X shorter than wide.

Pronotum: PL: PW = 0.61-0.67 (0.61); sides widest near base; surface with microsculpture similar to that of head, punctation slightly finer than that of head.

Elytra: EL: PL = 1.53-1.69 (1.69), EL: EW = 0.87-0.93 (0.93), EW: PW = 1.10-1.16 in males; EL: PL = 1.64-1.70; EL: EW = 0.88-0.92; EW: PW = 1.14-1.26 in females; posterior margin slightly rounded. Surface with coarser punctation than on pronotum, microsculpture distinct, consisting of irregular transverse meshes.

Male. Sternite VII (Figs 9C, 10C) similar to that of Tachinus hujiayaoi , with moderately deep triangular emargination at posterior margin, apical margin bent ventrad, with broad area of coarse granules. Tergite VIII as in Fig. 11C, with four almost fused lobes, forming a sinuate apical margin. Sternite VIII as in Fig. 13C. Median lobe of aedeagus (Fig. 15C) short and broad, distinctly projecting beyond apices of parameres, apical portion of median lobe with projection of unique shape. Parameres short, directed latero-apicad.

Female. Pronotum and elytra with microsculpture slightly more distinct. Elytra distinctly longer than in male, apical margin of elytra broadly rounded, without distinct projection near sutural angle. Tergite VIII (Fig. 18C) and sternite VIII (Fig. 20C) similar to those of Tachinus hujiayaoi .

Etymology.

The specific name (Latin adjective), meaning “crowned”, refers to the unique apical projection of the median lobe of the aedeagus.

Remarks.

Males of this can be separated from those of the other species by the unique projection on the apex of the median lobe of the aedeagus. Females are distinguished from those of all other species except Tachinus hujiayaoi by the shape of the apical margin of tergite VIII with two pairs of long setae.