Bolitogyrus rufomaculatus (Shibata, 1979)

Brunke, Adam J., 2017, A revision of the Oriental species of Bolitogyrus Chevrolat (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 664, pp. 1-97 : 45-48

Bolitogyrus rufomaculatus (Shibata, 1979) Figs 15 D–E, 15G, 21D (map)

Cyrtothorax rufomaculatus Shibata, 1979: 26.

Bolitogyrus rufomaculatus : Smetana 1995.

Type locality.

Near Lushan, Nantou County, Taiwan.

Type material.

Cyrtothorax rufomaculatus Shibata, 1979.

Paratypes (♂, ♀, cShi): Taiwan: Kaohsiung Hsien [now Kaohsiung City County], near Luikuei [=Liugui], July 31st 1976, Y. Shibata legt., 1 ♂ AJB0000432, 1 ♀ AJB0000433.

Other material.

TAIWAN: ‘Formosa’, S. Sauter, 1 ♀, AJB0000580 (ZMHB); Chiayi: Alishan National Scenic Area, road 18, to Youth Activity Centre, 2000 m, fern litter, 8.I.2009, S. Vit, 1 ♀, AJB0000549 (BMNH); Chashan, County road 129, km 33.5, 400 m, forest litter, 13.IV.2009, Viter, 1 ♂, AJB0000539 (cAss); Kaohsiung City: Hozan [=Fengshan], III.1910, S. Sauter, 1 ♂, AJB0000548 (ZMHB); Nantou: Huisun Forest Area, 24.075 120.998, 6.IV.2014, D. Huang (photo record); Lianhuachi, 16.VII.1973, Y. Kiyoyama, 1 ♀, AJB0000546 (cHay). Nanshanchi, 9.IV.1974, S. Takeda, 1 ♀, AJB0000541 (cHay); same except, 17.IV.1974, 2 ♀, AJB0000542 (cHay), AJB0000543 (SNUC); same except, 8.V.1978, K. Ando, 1 ♂, AJB0000544 (SNUC); same except, 3.V.1971, Y. Hayashi, 1 ♀, AJB0000545 (cHay); same except, 28.VII.1970, T. Kobayashi, 1 ♂, AJB0000547 (cHay); New Taipei City: Fuhosho [=Wucheng], Sauter, 1 ♀, AJB0000540 (NMW).

Diagnosis.

This species may be recognized by the following: head entirely dark; pronotum widest in posterior third; elytra partly dark, discal markings of elytra extending onto epipleuron, not forming v-shape, medial and lateral markings of different sizes and never entirely fused (Fig. 5G); median lobe in lateral view projected ventrad, with hooked apex and without distinct expansion, basal teeth appearing at or near ventral face (Fig. 15E); median lobe in parameral view with apex acuminate (Fig. 15D); paramere slightly to distinctly longer than median lobe and at most, as wide as median lobe in parameral view (Fig. 15 D–E).

Redescription.

Measurements ♂ (n = 5): HW/HL 1.39-1.44; PW/PL 1.33-1.37; EW/ EL 1.19-1.26; ESut/PL 0.85-0.89; PW/HW 1.04-1.07; forebody length 4.3-4.7 mm.

Measurements ♀ (n = 5): HW/HL 1.34-1.44; PW/PL 1.35-1.45; EW/ EL 1.19-1.24; ESut/PL 0.82-0.89; PW/HW 1.04-1.09; forebody length 4.5-5.0 mm.

Similar to B. vulneratus and differing only in the following: females sometimes with small basal area of forecoxae dark; head slightly less transverse, frontal impression more weakly impressed; antennomeres less transverse, 7 slightly, 8-10 distinctly transverse, 10 asymmetrical and longer than 9; pronotum more transverse; suture longer relative to pronotum at middle; forebody slightly longer; pronotal disc slightly more micropunctate; median lobe in lateral view with basal teeth appearing at ventral face (Fig. 15E); median lobe in parameral view widened in apical fourth and then strongly narrowed to acuminate apex, basal teeth appearing mediad of lateral margin (Fig. 15D); paramere at widest point, no wider than median lobe, slightly to distinctly longer than median lobe, with longer, slightly to distinctly acuminate apical portion (Fig. 15D); peg setae arranged in clear medial and marginal groups, medial group extended basad of marginal group (Fig. 15G); male sternite VIII emargination very slight; female tergite VIII with narrower emargination, varying from moderately deep to deep U-shaped; female tergite X with apical projection raised and distinctly longer than wide.

Distribution.

Figure 21D. Bolitogyrus rufomaculatus is distributed broadly in Taiwan, in mountainous areas on the western half of the island.

Bionomics.

Specimens have been collected in January, March-May and July, at elevations ranging from 400-2000 m. Some specimens have been sifted from litter.

Comments.

Bolitogyrus rufomaculatus may be allopatric with B. taiwanensis , the only other species of the genus on Taiwan. These two species are easily distinguished using the color of the elytra and are not each other’s closest relatives. Bolitogyrus rufomaculatus is most similar to allopatric B. depressus (mainland China) but lacks the expansion of the median lobe in lateral view, has a basal tooth on the median lobe, and the paramere is longer than the median lobe.