Bolitogyrus nigropolitus Smetana, 2000

Brunke, Adam J., 2017, A revision of the Oriental species of Bolitogyrus Chevrolat (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 664, pp. 1-97 : 14

Bolitogyrus nigropolitus Smetana, 2000 Figs 8 P–Q, 19B (map)

Bolitogyrus nigropolitus Smetana, 2000: 327.

Bolitogyrus nigropolitus : Cai et al. 2015.

Type locality.

Jianjin Shan, Tianquan County, Sichuan, China.

Type material.

Bolitogyrus nigropolitus Smetana, 2000.

Holotype (♂, cSch). CHINA: W-Sichuan, 1999, Ya’an Prefecture, Tianquan Co., Jiajin Shan, Tal oberh., Labahe N.R. St., 57 km W Ya’an, 30°06'N 102°25E, Streu, Rinde, Pilze, 1800 m, 12.VII., leg. M. Schülke [printed] / Sammlung M. Schulke Berlin [green label] / HOLOTYPE Bolitogyrus nigropolitus , A. Smetana, 2000 [red label] / AJB0000455 [identifier label].

Other material.

CHINA: Sichuan: Baoxing County, Pujigou, 2100 m, 30.6032 102.5627, 14.VIII.2003, J. Wu, 1 ♂, AJB0000456 (IZCAS); same except Fengtongzhai, 1730 m, 30.592 102.879, 30.VI.2003, H. Zhou, 1 ♀, AJB0000457 (IZCAS).

Diagnosis.

Among the members of the Electus Group: head punctures clearly separated (Fig. 8E); elytra non-metallic; hind tibia with at least distal half distinctly lighter than apex of femur (Fig. 8G); median lobe in lateral view with large expansion (Fig. 8P, arrow); paramere distinctly shorter than median lobe, distinctly dilated in apical third (Fig. 8Q); peg setae absent from narrow median area of paramere, pair of median clusters extended distinctly basad of marginal group (Fig. 8Q).

Redescription.

Measurements ♂ (n = 2): HW/HL 1.28-1.31; PW/PL 1.25-1.31; EW/ EL 1.25-1.29; ESut/PL 0.86-0.88; PW/HW 1.11-1.15; forebody length 4.5-4.6 mm.

Measurements ♀ (n = 1): HW/HL 1.26; PW/PL 1.23; EW/ EL 1.26; ESut/PL 0.83; PW/HW 1.16; forebody length 4.8 mm.

Extremely similar to B. electus and differing only in the following: antennomeres I-VI paler than following segments; hind tibia brownish to brownish-yellow, paler than apical darkened area of femur, especially lateral face (Fig. 8G); head slightly less transverse; sternites III-V with basal line projected sharply posteriad at middle; median lobe in lateral view with much larger expansion at apical third (Fig. 8P), with lateral teeth smaller; paramere distinctly shorter than median lobe, slightly less dilated, apex slightly attenuate (Fig. 8Q); peg setae with pair of median clusters extended distinctly basad of marginal group (Fig. 8Q); female tergite X with acute, pointed apex.

Distribution.

Figure 19B. Known from three localities within a small area of central Sichuan, China.

Bionomics.

Collected in June-August at elevations ranging from 1730-2100 m.

Comments.

Bolitogyrus nigropolitus is easily distinguished from its closest relatives by the paler antennae and legs.