Bolitogyrus electus Smetana & Zheng, 2000

Brunke, Adam J., 2017, A revision of the Oriental species of Bolitogyrus Chevrolat (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 664, pp. 1-97 : 10

Bolitogyrus electus Smetana & Zheng, 2000 Figs 1A, 3B, E, H, 4A, 8A, B, D, F, H, 19A (map)

Bolitogyrus elegans Smetana & Zheng, 2000a: 59.

Bolitogyrus electus Smetana & Zheng, 2000b: 465 (replacement name).

Bolitogyrus electus : Hu et al. 2011, misidentification of B. confusus.

Type locality.

Yulongshan, Yunnan, China.

Type material.

Bolitogyrus electus Smetana & Zheng.

Holotype (♂, NHMB). China, N-YUNNAN, Yulongshan mts., 2500-2800 m, GANHAIZI/LIJIANG road, lgt. D. Kral, 24-26/7/'90 [printed] / HOLOTYPE Bolitogyrus elegans A. Smetana, 1999 [red label] / AJB0000439 [identifier label].

Paratype (♀, NMW). CHINA: Yunnan, Gaoligongshan Nat. Res., 14-21.6.1993, E. Jendek & O. Sausa leg, AJB0000440.

Other material.

CHINA: Yunnan: Haba Shan, 2800-3150 m, 27.337 100.155, 8-19.VI.2004, Fouqué, R. & H, 1 ♂ 1 ♀, AJB0000462, AJB0000468 (cHay); Bichuan County, Jizu Shan, 2500-3200 m, 26-31.VII.1993, C. Holzschuh, 3 ♂, AJB0000463, AJB0000465, AJB0000469 (NMW); Jizu Shan, 2500-2700m, 25.966 100.350, 6-10.7.1994, Z. Cernin, 1 ♂ 1 ♀, AJB0000441, AJB0000464 (cHay); Weibaoshan, western slope, 25.169 100.352, 2000-2800, 25-28.VI.1992, V. Kubán, 1 ♀, AJB0000466 (NHMB).

Diagnosis.

Among the members of the Electus Group: head punctures clearly separated (Fig. 3E); elytra non-metallic; hind tibia entirely dark, as dark as darkened portion of femur (Fig. 3H); antennomere 6 quadrate, 7 weakly transverse (Fig. 4A); paramere slightly to distinctly longer than median lobe, with strongly attenuate apex in parameral view (Fig. 8A), in lateral view with broad lateral expansion (Fig. 8F); apex of median lobe in lateral view forming an elongate triangle (Fig. 8B); median lobe with expansion in lateral view (Fig. 8B).

Redescription.

Measurements ♂ (n = 5): HW/HL 1.33-1.37; PW/PL 1.28-1.32; EW/ EL 1.24-1.34; ESut/PL 0.84-0.91; PW/HW 1.09-1.13; forebody length 4.3-4.7 mm.

Measurements ♀ (n = 4): HW/HL 1.34-1.40; PW/PL 1.24-1.31; EW/ EL 1.25-1.30; ESut/PL 0.86-0.89; PW/HW 1.07-1.12; forebody length 4.6-5.1 mm.

Coloration: body black, abdominal segments sometimes slightly paler at base and apex, dorsal forebody often with faint metallic reflection; maxillary and labial palpi entirely yellowish-brown, last segment often darkened; antennomeres 1-4 or 1-5 reddish-orange with apices often darkened, 6-11 dark brown, contrasting with previous; legs bicolored: forecoxa yellow with basal fifth (males) or nearly one half dark brown (females), femur yellow and darkened apically, tibia entirely dark brown (very apex sometimes slightly paler), tarsus light brown.

Head distinctly transverse, dorsal surface with moderately dense but clearly separated and asetose punctures, frons distinctly more densely and coarsely punctate.

Pronotum distinctly transverse, posterior puncture in dorsal row occasionally doubled. Elytra weakly to distinctly transverse, shorter than pronotum at middle.

Abdomen with disc of tergites III-V distinctly, VI narrowly impunctate at middle; sternites III-V with basal line projected posteriad (IV-V weakly) at middle.

Median lobe with expansion at apical third in lateral view and narrowed to acute apex, with pair of moderately-sized lateral teeth projecting ventrad (Fig. 8B, H); apical portion of median lobe in parameral view gradually narrowed to acute apex (Fig. 8H); paramere slightly to distinctly longer than median lobe, entire but with median apical suture, distinctly dilated at apical fourth and then strongly converging to attenuate apex (Fig. 8A), in lateral view with broad lateral expansion (Fig. 8F); peg setae distributed in a marginal group and a pair of divergent and elongate median clusters that are narrowly to indistinctly separated from middle, median clusters extended only slightly basad of marginal group (Fig. 8D); apical margin of male sternites VII and VIII weakly emarginate, VIII with elongate triangular asetose area medially; male sternite IX distinctly expanded at midlength, with distinct apical emargination.

Female tergite X triangular with small rounded apex, disc not characteristically flattened.

Distribution.

Figure 19A. This species is distributed in the mountains of central Yunnan, China. The female paratype from Gaoligongshan may actually belong to B. uncus based on distribution. Until males are available from western Yunnan, the identity of this specimen must remain in doubt.

Bionomics.

Bolitogyrus electus is found at higher elevations than its closest relatives ( B. uncus , B. huanghaoi and B. confusus ) and, according to more precise labels, occurs at or above 2500 m. Specimens were collected in June and July.

Comments.

The identity of Bolitogyrus electus was until now rather confused in the literature (see discussion under B. confusus ) and the concept herein is based on diagnostic differences consistent with the male holotype. Presently, Bolitogyrus electus cannot be separated from B. uncus unless males are dissected but it is possible that these two species are not sympatric in Yunnan Province, China.