Barypalpus holzschuhi, Schillhammer, 2019

Schillhammer, Harald, 2019, A review of Barypalpus Cameron, 1932 (Coleoptera: Staphylinidae) with descriptions of three new species, Zootaxa 4629 (4), pp. 571-582 : 575-577

Barypalpus holzschuhi sp. n.

Holotype ♂: “NE-LAOS: Prov. Hua-phan, Ban Saluei, Phou Pan, 3.– 30.4.2014, 20°12‘N 104°01‘E, 1300–1900m, leg. Holzschuh ” ( NMW) .— Paratype: 1 ♀ with same data as holotype, but “1.– 31.5.2011, 1500–1900m “ ( NMW) .

Description (Habitus: Fig. 3 ): 10.3–11.7 mm long (5.1–5.3 mm, abdomen excluded). Black, shining; mandibles dark brown, palpi and labrum pale reddish, antennae reddish brown, basal segment often partly or entirely dark brown to blackish, sometimes middle segments to variable extent darker brown; posterior margins of tergites V–VII very narrowly, obscurely, badly delimited reddish, tergite VIII black with posterior fourth reddish; legs black to dark brown, protarsi reddish, meso- and metatarsi of similar color as tibiae at base, becoming paler distad, tarsomeres V usually reddish.

Head ( Fig. 11 ) rounded quadrangular, 1.13–1.14 times as wide as long, tempora subparallel, 1.8 (female) to 2.2 (male) times as long as very small 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 with faint traces of isodiametric microsculpture, in addition, 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 oblong, 1.07–1.08 times as long as wide, sides weakly rounded, surface without any setiferous punctures, with micropunctation and isodiametric microsculpture as on head; scutellum rather coarsely, moderately densely punctate; elytra ( Fig. 15 ) along sides markedly longer than pronotum along midline, with coarse and dense, almost uniform punctation, becoming somewhat finer laterad, hypomera densely, moderately coarsely punctate; abdominal tergites with dense and coarse, almost pit-like punctation, from third visible tergite on, punctural grooves becoming increasingly longitudinal posteriad; abdominal characters hardly differing from those of the previous species.

Aedeagus ( Figs 21, 22 , 27 ) with median lobe in ventral view almost parallel-sided ( Fig. 21 ), apex in lateral view ( Fig. 22 ) straight, paramere ( Fig. 27 ) slightly longer than median lobe, slender, parallel-sided, peg setae ar- ranged in irregular subapical cluster.

Diagnosis: The species differs from B. ruficornis by the generally darker color, particularly of the posterior margins of the abdominal tergites, the smaller eyes and the almost uniform elytral punctation.

Distribution: The species is known only from the type locality.

Etymology: The species is named in honor of its collector, Carolus Holzschuh, whose extensive collecting at this locality contributed a lot to the knowledge of Staphylinidae from Laos.

Figures

FIGURES 3–4. Habitus of Barypalpus holzschuhi sp. n. (3); B. chinensis sp. n. (4).

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 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).

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).