Tachinus (s. str.) cavazzutii 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 : 56-57

Tachinus (s. str.) cavazzutii Feng, Li & Schuelke sp. n. Figs 1C, 1D, 9B, 10B, 11B, 13B, 15B, 18B, 20B, 21B

Type locality.

China, Sichuan Province, Nanping, Jiuzhaigou.

Type material.

Holotype: ♂, CHINA: Sichuan Prov., Aba A. R., Nanping County, Jiuzhaigou, 27.vii.2001, LI & ZHAO leg. (SNUC). Paratypes: 11 ♂♂, 11 ♀♀, same label data as holotype (SNUC); 3 ♂♂, 1 ♀, CHINA: Sichuan Prov., pass between Pingwu and Nanping, 3100 m, 22.viii.1999, Cavazzuti leg. (cSme, cSch); 2 ♀♀, CHINA: N–Sichuan [CH12-20] 60 km N Songpan, road S 301 km 103, N Gongangling pass, 33°10'06"N, 103°43'13"E, 3000 m, forest near creek, litter sifted, 9.viii.2012, leg. M. Schülke (cSch); ♂, CHINA: N–Sichuan [CH12-19] 47 km N Songpan, road S 301 km 118, N Gongangling pass, 33°03'15"N, 103°43'36"E, 3390 m, spruce forest with shrubs, litter, moss, and mushrooms sifted, 9.viii.2012, leg. M. Schülke (cSch).

Description.

Measurements of males (holotype):BL 4.05-4.73 (4.73); FL 3.11-3.78 (3.78); PL 0.89-1.06 (1.06); EL 1.39-1.67 (1.67); SEL 0.10-0.12 (0.12); HW 0.89-1.00 (1.00); PW 1.50-1.67 (1.67); EW 1.78-1.83 (1.83); relative length of antennomeres I–XI: 23: 13: 17: 10: 14: 14: 14: 15: 14: 14: 25. Measurements of females: BL 4.45-4.73; FL 3.45-3.84; PL 1.00-1.06; EL 1.66-1.68; SEL 0.16-0.18; HW 0.89-0.95; PW 1.50-1.61; EW 1.89-1.95. HW: PW = 0.55-0.63; relative length of antennomeres I–XI: 25: 17: 16: 10: 15: 15: 15: 15: 15: 15: 22.

Body (Figs 1C, 1D) dark brown; basal four antennomeres, mouthparts, posterior margin of elytra and legs reddish brown.

Head shorter than wide, HW: PW = 0.53-0.67 (0.60), punctation fine and sparse; microsculpture composed of irregular transverse striae. Antennae moderately short, antennomeres X slightly shorter than wide.

Pronotum: PL: PW = 0.53-0.71 (0.63); apical margin transversely sinuate, base slightly arcuate; side broadly rounded, widest in basal third; microsculpture consisting of irregular transverse striae, punctation denser and finer than that of head.

Elytra only slightly elongate, EL: EW = 0.76-0.91 (0.91), EL: PL = 1.31-1.88 (1.58), EW: PW = 1.07-1.22 (1.10) in males; EL: EW = 0.85-0.89, EL: PL = 1.57-1.68, EW: PW = 1.17-1.30 in females; surface with denser and coarser punctation than that of head and with dense microsculpture consisting of transverse meshes.

Abdomen with microsculpture radiating from punctures.

Male. Sternite VII (Figs 9B, 10B) with posterior margin broadly and deeply emarginate, apical margin bent ventrad, with moderately broad area of coarse granules. Tergite VIII (Fig. 11B) with four almost reduced lobes, lateral lobes slightly longer than median ones. Sternite VIII as in Fig. 13B. Aedeagus (Fig. 15B) with median lobe broad and projecting beyond apices of parameres, apical portion of median lobe with slight projection; parameres short, of latero-apicad orientation, broadly triangular in lateral view.

Female (Fig. 1D). Pronotum with microsculpture more distinct, forming transverse meshes. Elytra distinctly longer than that of male; posterior margin rounded; microsculpture denser and more distinct than in male. Abdominal tergite VIII (Fig. 18B) with posterior margin deeply emarginate medially, lateral angles each with one long seta. Sternite VIII (Fig. 20B) with six distinct lobes, fimbriate median lobes separated by shallow emargination.

Etymology.

The species is named after Pierfranco Cavazzuti (Pagno, Italy), the collector of some paratypes.

Remarks. Males can be separated from the other species by the apical projection of the median lobe of the aedeagus, and by the broadly triangular parameres (in lateral view). Females are distinguished by the unique shape of tergite VIII.