Bolitogyrus pederseni Brunke

Brunke, Adam J., 2017, A revision of the Oriental species of Bolitogyrus Chevrolat (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 664, pp. 1-97 : 27

Bolitogyrus pederseni Brunke sp. n. Figs 1F, 11 D–F, 20B (map)

Type locality.

Ban Thongvay, Muang Paxong, Bolaven Plateau, Champasak, Laos.

Type material.

Holotype (♂, ZMUC): DNA voucher [blue label] / LAOS: Champasak prov., Bolaven plat., 1000 m, 8.VI.2008, Solodovnikov and Pedersen / zmuc00046170 [identifier label] / Bolitogyrus n.sp. nr. carnifex Det. A. Brunke / HOLOTYPE Bolitogyrus pederseni Brunke, des. A. Brunke 2017 [red label].

Paratype (1 ♂ IRSNB): Coll. I.R.Sc.N.B., Cambodia, Ratanakiri prov., Veunsai, 13°59N 106°49E, 10-15.x.2007, leg. S. DeGreef and P. Naskreki / AJB0000587 [identifier label] / PARATYPE Bolitogyrus pederseni Brunke, des. A. Brunke 2017 [yellow label].

Diagnosis.

Within the Carnifex Group: elytral disc entirely reddish (Fig. 1F); abdominal tergites III-V with relatively wide dark markings at middle (Fig. 5C); peg setae arranged in both marginal and medial groups (Fig. 11F); apex of median lobe knob-like in lateral view, with prominent pair of subapical teeth each situated on longitudinal ridge (Fig. 11E); basal teeth of median lobe situated laterally (Fig. 11D).

Description.

Measurements ♂ (n = 2): HW/HL 1.38-1.39; PW/PL 1.40-1.42; EW/ EL 1.23-1.24; ESut/PL 0.82-0.84; PW/HW 1.13-1.14; forebody length 6.3-6.4 mm.

Extremely similar to B. carnifex and differing only in the following: lateral face of mid-femur with at least a faint dark band (Fig. 5D); median lobe in lateral view with prominent pair of subapical teeth each situated on longitudinal ridge forming lateral outline (Fig. 11E); median lobe in parameral view more slender, constricted weakly about midway, slightly dilated in apical third and narrowed to acuminate apex (Fig. 11D); median lobe in lateral view narrower in apical half (Fig. 11E); basal-most peg setae removed from margin (Fig. 11F).

Distribution.

Figure 20B. Known from the Bolaven Plateau in southern Laos and an adjacent region of northern Cambodia.

Bionomics.

The holotype was collected by pyrethrum fogging of fungusy logs in a disturbed primary rainforest (selective logging) at 1000 m during June. The paratype was collected in a malaise trap during October.

Etymology.

This species is named after Jan Pedersen (ZMUC), a friend and Coleopterist, collector of the holotype, and one who shares an interest in this genus.

Comments.

Bolitogyrus pederseni is most similar to allopatric B. vietnamensis from northern Vietnam but can be distinguished by the more rounded apex of the median lobe and broader paramere.