Tachinus (s. str.) hujiayaoi 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 : 61-62

Tachinus (s. str.) hujiayaoi Feng, Li & Schuelke sp. n. Figs 3A, 3B, 9E, 10E, 11E, 13E, 15E, 18E, 20E, 21E

Type locality.

China, Shaanxi Province, Taibai Mountain.

Type material.

Holotype: ♂, CHINA: Shaanxi Prov., Baoji City, Taibai County, Mt. Taibai, alt. 2,750-3,300 m, 12.vii.2004, HU, TANG & ZHU leg. (SNUC). Paratypes: 56 ♂♂, 38 ♀♀, same label data as holotype (SNUC); 11 ♂♂, 17 ♀♀, CHINA: Shaanxi Prov., Baoji City, Taibai County, Mt. Taibai, alt. 2,750-3,300 m, 12.vii.2004, HU & TANG leg. (SNUC); 22 ♂♂, 12 ♀♀, CHINA: Shaanxi Prov., Qinling, 33°51'N, 108°47'E, mountain W pass at autoroute km 70, 47 km S Xi'an, 2,300-2,500 m, 26-30.viii.1995, A. Pütz, M. Schülke leg. ( cPüt, cSch); 1 ♀, CHINA: Shaanxi Prov., Qinling, 33°51'N, 108°47'E, mountain W pass at autoroute km 70, 47 km S Xi'an, 2,500-2,600 m, 26-29.viii.1995, Wrase leg. (cSch); 1 ♀, CHINA: S–Shaanxi, Qinling, range W pass on rd. Xi'an–Shagoujie, 45 km SSW Xi'an, 33°52'N, 108°46'E, 2,600 m, 25.vii.2001, A. Smetana leg. (cSme).

Description.

Measurements of males (holotype): BL 4.23-4.61 (4.61); FL 3.11-3.22 (3.22);PL 0.89-0.95 (0.95); EL 1.33-1.45 (1.45); SEL 0.08-0.11 (0.11); HW 0.82-0.84 (0.83); PW 1.39-1.45 (1.45); EW 1.56-1.61 (1.61); relative length of antennomeres I–XI: 23: 17: 17: 8: 13: 12: 12: 13: 13: 14: 27. Measurements of females: BL 4.33-4.45; FL 3.45-3.50;PL 0.89-0.95; EL 1.61-1.72; SEL 0.22-0.28; HW 0.88-1.00; PW 1.45-1.50; EW 1.78-1.83; relative length of antennomeres I–XI: 24: 18: 16: 11: 15: 13: 13: 13: 12: 13: 30.

Body (Figs 3A, 3B) dark brown to black, disc of elytra brown, mouthparts, basal four antennomeres, lateral margins of pronotum, posterior margin of elytra, abdominal tergites and legs reddish brown.

Head transverse, HW: PW = 0.57-0.60 (0.57) in males, HW: PW = 0.59-0.69 in females;disc with microsculpture consisting of irregular striae, posterior portion with microsculpture consisting of transverse meshes, punctation fine and sparse. Antennae moderately short, antennomeres X slightly shorter than wide.

Pronotum: PL: PW = 0.59-0.68 (0.66), punctation similar to that of head, microsculpture consisting of irregular transverse meshes.

Elytra: EL: EW = 0.83-0.93 (0.90), EL: PL = 1.40-1.63 (1.53), EW: PW = 1.08-1.16 (1.11) in males; EL: EW = 0.88-0.97, EL: PL = 1.69-1.93, EW: PW = 1.19-1.26 in females; apical margin broadly rounded, punctation coarser than that of head and pronotum, microsculpture more distinct than on head and pronotum, consisting of shorter transverse meshes.

Abdomen with fine microsculpture consisting of transverse lines.

Male. Sternite VII (Figs 9E, 10E) triangularly emarginate at posterior margin, apical margin bent ventrad, with moderately broad area of coarse granules. Tergite VIII as in Fig. 11E. Sternite VIII as in Fig. 13E, all four lobes nearly fused, forming a sinuate apical margin. Median lobe of aedeagus (Fig. 15E) apically distinctly projecting beyond apices of parameres, apical part with characteristic projections.

Female. Elytra slightly longer than in male, inner part of posterior margin weakly produced, forming a broadly obtuse angle. Tergite VIII (Fig. 18E) with lobes almost fused, apical margin of median lobe broadly and triangularly projecting, as long as lateral lobes; lateral lobes each with one pair of long setae. Sternite VIII (Fig. 20E) with six lobes, fimbriate median lobes nearly fused, with small and shallow emargination, sublateral lobes slightly longer than fimbriate median lobes.

Etymology.

The species is named after Jia-Yao Hu (Shanghai), a colleague and friend specializing in Paederinae and Quediina .

Remarks.

The new species is most similar to Tachinus coronatus externally, and can be separated only by aedeagal characters. Males of Tachinus hujiayaoi can be differed from those of the other species by the unique shape of the apical projections of the aedeagal median lobe. Females are distinguished from those of all other species except Tachinus coronatus by the shape of the apical margin of tergite VIII (lateral lobes each with one pair of long setae).