Bolitogyrus flavus Yuan et al., 2007

Brunke, Adam J., 2017, A revision of the Oriental species of Bolitogyrus Chevrolat (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 664, pp. 1-97 : 45

Bolitogyrus flavus Yuan et al., 2007 Figs 2C, 6C, 6F, 7B, 13 L–O, 22A

Bolitogyrus flavus Yuan et al., 2007: 148.

Type locality.

Manfei, Nabanhe Reserve, Xishuangbanna, Yunnan, China.

Type material.

Bolitogyrus flavus Yuan et al., 2007.

Holotype (♂, SNUC): Manfei, Nabanhe N.R., Jinghong City, Yunnan Prov., 9.I.2004, Li-Zhen Li & Liang Tang leg. [printed] / "[HOLOTYPE] Bolitogyrus flavus , Yuan, Zhao, Li & Hayashi, 2007, SHNU Collections" [red label] / AJB0000417 [identifier label].

Other material.

CAMBODIA: Siem Reap: Angkor, Preah Khan temple, Malaise trap, 2.V.2006, leg. Oul Yothin, 1 ♂, AJB0000589 (IRSNB). LAOS: Bolikhamsai: Lak Sao, Rd. no. 8, 500 m, 25-27.X.2003, S. Kurbatov, 1 ♂, AJB0000418 (NHMB); Khammouane: Ban Khounkham (Khun Kham) (Nahin), 18.217 104.514, 300 m, on tree fungi, disturbed primary rainforest, 3-5.VI.2008, A. Solodovnikov and J. Pedersen, 1 ♀, AJB0000554 (ZMUC); Ban Khoun Ngeun, 18.117 104.481, 200 m, 24-29.IV.2001, C.L. Pesa, 1 ♂, AJB0000555 (cShi), 1 ♀, AJB0000564 (NHMB); Nakai (environs of), route no. 8, 17.569 105.139, 560 m, 4-8.V.1995, E. Jendek & O. Sausa, 1 ♀, AJB0000565 (cShi). Louangphabang: Thong Khang, 750 m [should be 650 m], 19.585 101.966, 11-21.V.2002, J. Chalupek, 1 ♀, AJB0000566 (cShi).

MYANMAR: Kayin State: Kawkareik, V.1887, Fea, 1 ♂, AJB0000560 (IRSNB); Shan State: Shweudaung Wildlife Sanct., 23.085 96.225, ca. 360 m, FIT, 1-15.VIII.2002, M. Hlaing & A. Moe, 1 ♂, AJB0000563 (NMW).

THAILAND: Chiang Mai: Doi Suthep, 1000 m, on waterlogged wood in stream, 1979, G. de Rougemont, 1 ♂, AJB0000550 (cRou); Chiang Dao, 5-10.VII.1997, M. Klicha, 1 ♂, AJB0000558 (NMW); Chiang Dao, 26.X.2010, G. de Rougemont, 1 ♂, AJB0000562; Mae Rim, 3-4.VII.1997, M. Klicha, 1 ♂, AJB0000557 (NMW); Kanchanaburi Thong Pha Phum district, 30.VI-2.VII.1999, M. Klicha, 1 ♀, AJB0000556 (NMW); Ranong: Ranong, Doherty, 1 ♀, AJB0000552 (BMNH); Yala: Gunung Cang dun [=village], Betong, 25.III-22.IV.1993, Horak and Strnad, 1 ♂, AJB0000559 (NMW).

VIETNAM: Hoa Bihn: Hoa Binh, 1980, Clermont, 1 ♀, AJB0000553 (FMNH); Nghe An: Phuc Son, Fruhstorfer, N.-Dec., 1 ♀, AJB0000561 (FMNH); Tuyen Quang: Son Duong [translated from Cyrillic], 300 m, 23.III.1962, Kabakov, 1 ♀, AJB0000551 (ZIN).

Diagnosis.

This species may be recognized by the following: head entirely dark; pronotum widest in posterior third; elytra partly dark, base of elytra with broad pale area composed entirely of pale, raised yellow marking extending onto epipleuron (Fig. 2C, 6C); elytra with punctures along sutural area (Fig. 6C); paramere not constricted apically (Fig. 13L); female tergite VIII with wide triangular emargination (Fig. 7B).

Redescription.

Measurements ♂ (n = 5): HW/HL 1.31-1.38; PW/PL 1.31-1.39; EW/ EL 1.19-1.28; ESut/PL 0.75-0.81; PW/HW 1.04-1.08; forebody length 4.6-4.7 mm.

Measurements ♀ (n = 5): HW/HL 1.33-1.39; PW/PL 1.29-1.38; EW/ EL 1.18-1.25; ESut/PL 0.74-0.80; PW/HW 1.06-1.07; forebody length 4.2-4.9 mm.

Similar to B. vulneratus and differing only in the following: elytra with broad basal area composed entirely of raised yellow marking, pale area variable, as large spot extending to apical two-thirds (Fig. 6C) to extended to almost entire disc and leaving only apical angles dark (Fig. 2C); dark markings on femoral apices slightly larger on some specimens but never including dorsal face; head less transverse; antennomeres 7-10 distinctly transverse (Fig. 6F); pronotum more transverse; abdominal tergite VI not or only narrowly impunctate at middle; median lobe in lateral view with basal teeth formed as wide, toothed ridge (Fig. 13N); median lobe in parameral view with basal teeth barely visible, apical portion elongate and expanded, then suddenly constricted to acuminate and narrow apex (Fig. 13M); paramere elongate spoon-shaped (Fig. 13L), peg setae arranged in wide marginal group, convergent basally (Fig. 13O).

Distribution.

Figure 22A. Bolitogyrus flavus is widely distributed over the mainland of the southeast Oriental region.

Bionomics.

As far as known, B. flavus is a lowland to lower montane species and does not occur above 1000 m. Specimens have been collected in all months except February and September. Bolitogyrus flavus has been collected from fungi and rotten wood.

Comments.

Bolitogyrus flavus is the most commonly collected species of the genus in the Oriental region. Several single females could extend its range even further but may actually represent other related species.