Bolitogyrus rufipennis (Cameron, 1937)

Brunke, Adam J., 2017, A revision of the Oriental species of Bolitogyrus Chevrolat (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 664, pp. 1-97 : 24

Bolitogyrus rufipennis (Cameron, 1937) Figs 1E, 10 K–M, 19D (map)

Cyrtothorax rufipennis Cameron, 1937: 27

Type locality.

Baturaden ( “Batoerraden”), Mt. Slamet, Central Java.

Type material.

Cyrtothorax rufipennis Cameron, 1937.

Lectotype (♂, BMNH, here designated): Batoerraden, G. Slamat [=Mount Slamet], Java, F.C. Drescher, VII.1928 [printed] / M. Cameron., Bequest, B.M. 1955-147 [printed] / Lectotype ♂, Cyrtothorax rufipennis Cameron, 1937, des. A. Brunke 2017 [red printed label] / AJB0000402 [identifier label].

Paralectotypes (2 ♂, 1 ♀, BMNH, FMNH): same as lectotype, AJB0000403, AJB0000502; same as lectotype except, 18.I.1929, AJB0000501.

In his description of B. rufipennis , Cameron (1937) stated ambiguously that the ‘Type’ was in his collection. However, label data was given for ‘Batoerraden’ and ‘Pengalengan’, two different, distant Javanese volcanoes. Complicating matters, the specimen bearing a circular BMNH type label (the only one collected by Fruhstorfer) does not correspond with Cameron’s morphological description (black frons, only apical antennomere paler) and is instead a female closely related to B. doesburgi (Scheerpeltz). In order to stabilize the taxonomic concept of B. rufipennis , a different, male, specimen (from “Batoerraden”) that matches the original description (orange frons, apical two antennomeres paler) is here designated as a lectotype. The female from Pengalengan is excluded from the paralectotypes.

Diagnosis.

Among the members of the Caesareus Group: pronotum entirely pale; elytra without dark spot; first two visible abdominal segments without distinct darkened area (Fig. 1E); median lobe with a pair of median teeth at subapex.

Redescription.

Measurements ♂ (n = 3): HW/HL 1.35-1.35; PW/PL 1.31-1.35; EW/ EL 1.18-1.20; ESut/PL 0.76-0.79; PW/HW 1.01-1.04; forebody length 6.4-6.7 mm.

Measurements ♀ (n = 1): HW/HL 1.31; PW/PL 1.20; EW/ EL 1.21; ESut/PL 0.76; PW/HW 1.0; forebody length 6.4 mm.

Similar to B. caesareus but differing only in the following: antennae with apical 2 segments distinctly paler, first segment entirely yellow; palpi with last segment darkened; abdominal tergites III-V without clear dark markings; antennomeres 7-10 transverse and asymmetrical; head slightly less transverse; pronotum slightly less transverse; elytra distinctly shorter proportional to pronotum at middle; forebody slightly longer; elytral disc with small, variably-shaped, elevated and impunctate yellow spot; elytral disc with setose punctures only in usual rows; median lobe in lateral view angularly truncate with sharp apex, with pair of median teeth basad of truncate face (one visible in lateral view), this tooth arising from middle of subapex, not apical carina (Fig. 10L); median lobe in parameral view more strongly dilated subapically (Fig. 10K); paramere slightly longer than median lobe, peg setae similar but more restricted to marginal area and leaving a wider median space empty (Fig. 10 M); male sternite IX with regular setation, without conspicuous rows of long setae; female unknown.

Distribution.

Figure 19D. Endemic to Java and possibly to Mt. Slamet.

Bionomics.

No additional data accompanies the specimens.

Comments.

Several female specimens examined are similar to B. rufipennis but may represent additional species (see 'Undescribed Species’, below).