Tachinus (s. str.) maderianus Feng & Li

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 : 71-73

Tachinus (s. str.) maderianus Feng & Li sp. n. Figs 5A, 5B, 9I, 10I, 11I, 13I, 16C, 19A, 20J, 21J

Type locality.

China, Sichuan, Jiulong, Wahuishan Mountain.

Type material.

Holotype: ♂, CHINA: Sichuan Prov., Ganzi A. R., Jiulong County, Wahuishan, alt. 3,900 m, 26.viii.2005, [collector unknown] (SNUC). Paratypes: 2 ♂♂, 4 ♀♀, same label data as holotype; 1 ♂, 2 ♀♀, CHINA: Sichuan Prov., Ganzi A. R., Jiulong County, Wuxuhai, alt. 3,700 m, 18.viii.2005, [collector unknown] (SNUC).

Description.

Measurements of males: BL 4.26-4.39; FL 3.34-3.39; PL 0.99-1.01; EL 1.55-1.57; SEL 0.11-0.17; HW 0.83-0.89; PW 1.44-1.46; EW 1.61-1.72; relative length of antennomeres I–XI: 24: 15: 15: 8: 15: 13: 13: 11: 12: 12: 25. Measurements of females: BL 4.67-4.73; FL 4.00-4.11; PL 0.99-1.01; EL 1.78-1.83; SEL 0.38-0.40; HW 0.88-0.90; PW 1.53-1.56; EW 1.88-1.90; relative length of antennomeres I–XI: 25: 15: 18: 10: 14: 14: 14: 14: 14: 14: 24.

Body (Figs 5A, 5B) dark brown to black; mouthparts, basal four antennomeres and legs reddish brown.

Head slightly transverse, HW: PW = 0.56-0.62, surface with fine punctation and dense microsculpture consisting of meshes. Antennomeres X distinctly shorter than wide in male, but slightly shorter than wide in female.

Pronotum: PL: PW = 0.68-0.70 (male), PL: PW = 0.63-0.66 (female); surface with punctation similar to that of head, microsculpture consisting of transverse striae.

Elytra: EL: PL = 1.53-1.59, EL: EW = 0.90-0.98, EW: PW = 1.10-1.19 in males; EL: PL = 1.76-1.85, EL: EW = 0.94-0.97, EW: PW = 1.21-1.24 in females; surface with coarser punctation than head and pronotum, microsculpture consisting of transverse meshes.

Abdomen with microsculpture consisting of transverse striae, punctation moderately coarse and dense.

Male. Posterior margin of elytra broadly rounded. Sternite VII (Figs 9I, 10I) with apical margin broadly and deeply emarginate, apical margin bent ventrad, with very broad area of coarse granules. Tergite VIII as in Fig. 11I, all four lobes nearly fused, forming a sinuate apical margin. Sternite VIII as in Fig. 13I. Median lobe of aedeagus (Fig. 16C) as wide as, and longer than parameres, parameres forming one apically truncate plate.

Female. Inner part of posterior margin of elytra distinctly produced, forming a distinct angle. Posterior margin of tergite VIII (Fig. 19A) without distinct lobes, lateral angles each with only one long seta. Sternite VIII (Fig. 20J) with fimbriate median lobes separated by a shallow emargination; sublateral lobes as long as median ones.

Etymology.

The specific name (adjective) is derived from the name of the Austrian entomologist Leopold Mader (1886-1961), referring to the similarity of this species to Tachinus maderi .

Remarks.

Males can be separated from those of other species by the shape of the very broadly bent portion of sternite VII, as well as by the shape of the parameres, and the apical projection of the median lobe of the aedeagus. Females are distinguished by the shape of the apical margin of tergite VIII.