Tachinus (s. str.) linzhiensis 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 : 63-65

Tachinus (s. str.) linzhiensis Feng & Li sp. n. Figs 4A, 4B, 9G, 10G, 11G, 13G, 16A, 18G, 20G, 21G

Type locality.

China, Tibet A. R., Linzhi County, Basongcuo.

Type material.

Holotype: ♂, CHINA: Tibet A. R., Linzhi County, Basongcuo, alt. 3,465 m, 9.viii.2004, Li-Zhen LI leg. (SNUC). Paratypes: 11 ♂♂, 5 ♀♀, same label data as holotype (SNUC).

Description.

Measurements of males (holotype):BL 3.89-4.17 (3.89); FL 2.95-3.17 (2.95); PL 0.94-0.96 (0.95); EL 1.45-1.56 (1.56); SEL 0.06-0.08 (0.06); HW 0.83-0.89 (0.89); PW 1.39-1.45 (1.39); EW 1.56-1.61 (1.56); relative length of antennomeres I–XI: 21: 13: 14: 10: 15: 12: 13: 12: 13: 12: 27. Measurements of females: BL 4.84-5.12; FL 3.61-3.73; PL 0.95-1.00; EL 1.61-1.67; SEL 0.11-0.14; HW 0.88-0.90; PW 1.49-1.51; EW 1.72-1.78; relative length of antennomeres I–XI: 20: 14: 15: 10: 14: 14: 14: 14: 14: 14: 24.

Body (Figs 4A, 4B) black to piceous; mouthparts, antennomeres I and IV, elytra and legs reddish brown.

Head slightly transverse, HW: PW = 0.57-0.64 (0.64). Surface of head with distinct microsculpture and fine and sparse punctation. Antennae moderately short, antennomeres X slightly transverse or as long as wide.

Pronotum: PL: PW = 0.63-0.69 (0.68), surface with microsculpture consisting of transverse irregular meshes, punctation finer than that of head.

Elytra short, EL: EW = 0.90-1.00 (1.00), EL: PL = 1.51-1.66 (1.64), EW: PW = 1.08-1.16 (0.12) in males; EL: EW = 0.90-0.97, EL: PL = 1.61-1.76, EW: PW = 1.14-1.19 in females; with microsculpture consisting of transverse meshes, more coarsely punctate than head and pronotum.

Surface of abdomen with dense microsculpture consisting of transverse lines, punctation similar to that of elytra.

Male. Sternite VII (Figs 9G, 10G) only shallowly emarginate at posterior margin, apical margin bent ventrad, with broad area of coarse granules. Tergite VIII (Fig. 11G) with four short lobes, median lobes broader and slightly longer than lateral ones. Sternite VIII as in Fig. 13G. Aedeagus (Fig. 16A) with parameres much longer than median lobe; parameres directed apicad, slightly curved medially. Parameres projecting beyond apex of median lobe by one quarter length of median lobe.

Female. Elytra only slightly longer than in male, apical margin broadly rounded. Tergite VIII (Fig. 18G) long and broad, distinctly trilobed, lateral lobes shorter than median lobe, apical margin of median lobe slightly emarginate at middle; lateral lobes each with one pair of long setae. Sternite VIII (Fig. 20G) with fimbriate median lobes completely fused.

Etymology.

The specific name (adjective) is derived from “Linzhi”, the type locality of this species.

Remarks.

Males can be separated from those of the other species of the group by the apically strongly elongate aedeagal parameres. Females are distinguished from those of all other species except Tachinus paralinzhiensis by the shape of tergite VIII, from those of Tachinus paralinzhiensis by the totally fused fimbriate lobe of sternite VIII.