Barypalpus ruficornis Cameron, 1932

Schillhammer, Harald, 2019, A review of Barypalpus Cameron, 1932 (Coleoptera: Staphylinidae) with descriptions of three new species, Zootaxa 4629 (4), pp. 571-582 : 572-573

Barypalpus ruficornis Cameron

Barypalpus ruficornis Cameron 1932: 276 .

Type material: Lectotype ♂ (present designation): “Type \ Birmah Ruby M es \ Doherty \ Fry Coll. 1905.100. \ Barypalpus ruficornis Cam. Type” ( BMNH) .— Paralectotype: 1 ♀ (“Cotype”) with same data as holotype ( BMNH) .

Description (Habitus: Fig. 1 ): 10.0– 11.1 mm long (4.8–5.2 mm, abdomen excluded). Black, shining; palpi and labrum pale reddish, antennae reddish brown, suture of elytra sometimes obscurely reddish, particularly in the type specimens which might be paler due to their age; posterior margins of tergites IV–VI narrowly but well delimited reddish, tergite VII more broadly and tergite VIII entirely reddish; legs dark reddish brown, protarsi paler reddish, distinctly paler that tibia.

Head ( Fig. 9 ) rounded quadrangular, 1.20–1.25 times as wide as long; eyes very small, tempora subparallel, 1.6–1.8 times as long as eyes, dorsal surface with only a few larger setiferous punctures along medial margin of eyes, on tempora and along base of head; hind angles of head broadly rounded; surface of head without microsculpture, but with moderately dense micropunctation; antennae moderately long, segments 4–5 slightly oblong, segments 6–8 about as long as wide, segments 9 and 10 slightly transverse; pronotum slightly longer than wide (ratio 1.04–1.09), widest at anterior third, sides weakly rounded, surface without any setiferous punctures, polished, with micropunctation as on head; scutellum sparingly punctate; elytra ( Fig. 13 ) along sides markedly longer than pronotum along midline, with irregular rows of larger punctures, becoming distinctly finer and less dense laterad, and with interspersed finer punctation, along sides almost only very fine punctures left, hypomera densely and coarsely punctate; abdominal tergites with dense and coarse, almost pit-like punctation, from third visible tergite on, punctural grooves becoming increasingly longitudinal posteriad; tergite VII with whitish seam of palisade setae; male sternite VIII ( Fig. 29 ) with moderately deep medio-apical emargination and narrow semi-membranous extension.

Aedeagus ( Figs 17, 18 , 25 ) rather small; apical portion of median lobe widened in ventral view ( Fig. 17 ), outline more or less regularly convex, apex subacute, in lateral view ( Fig. 18 ) with apex shortly, slightly hook-like bent toward paramere, with minute subapical tooth on parameral face; paramere ( Fig. 25 ) slender, subparallel-sided, somewhat shorter than median lobe, apex either subtruncate, slightly convex or slightly emarginate, peg setae arranged in two irregular sublateral rows, number and arrangement of peg setae seems to be quite variable.

Diagnosis: See following species and key.

Additional material examined: MYANMAR: 1 ♂: Mandalay Region, Mogok Township, S Panlin village, Mt. Taung Mae , W-slope, 1710–1750 m, ca. 22°58’09”N 96°27’13”E, 10.–18.VI.2014, FIT, leg. Brunke & Schil- lhammer [MBS 201C] ( NMW) ; 1 ex.: same collecting event as previous, but probably with slightly differing labels ( NHMD); (3 ♂♂: ibidem, but, 1780 m, ca. 22°58’03”N 96°27’22”E, 17.–21.V.2016, FIT, leg. Schillhammer, Brunke, Jenkins-Shaw, Jensen [MBS 213A] ( NMW).

Distribution: The species is at present known only from the type locality. Mount Taungmae is regarded as being roughly the place where W. Doherty collected the type specimens (environments of Bernardmyo, north of Mogok).

Figures

FIGURES 1–2. Habitus of Barypalpus ruficornis Cameron (1); B. shibatai sp. n. (2).

FIGURES 9–12. Head (dorsal view) of Barypalpus ruficornis (9), B. shibatai sp. n. (10), B. holzschuhi sp. n. (11), B. chinensis sp. n. (12).

FIGURES 13–16. Elytra of Barypalpus ruficornis (13), B. shibatai sp. n. (14), B. holzschuhi sp..n. (15), B. chinensis sp. n. (16).

FIGURES 25–29. Paramere of Barypalpus ruficornis (25), B. shibatai sp. n. (26), B. holzschuhi sp. n. (27), B. chinensis sp. n. (28); male sternite VIII of B. ruficornis (29).

FIGURES 17–24. Aedeagus of Barypalpus ruficornis (17, 18), B. shibatai sp. n. (19, 20), B. holzschuhi sp. n. (21, 22), B. chinensis sp. n. (23, 24)—ventral view (17, 19, 21, 23), lateral view (18, 20, 22, 24).