Pseudobironium schuhi, Lobl & Liang Tang, 2013

Löbl, Ivan & Tang, Liang, 2013, A review of the genus Pseudobironium Pic (Coleoptera: Staphylinidae: Scaphidiinae), Revue suisse de Zoologie 120 (4), pp. 665-734 : 687-689

Pseudobironium schuhi sp. nov. Figs 27-29

HOLOTYPE: Ƌ, INDONESIA, W. Java, Mt. Gede , 50 km SE Bogor, 1400-1600m, 5-6.XI.1989, leg. I. Löbl, D. Agosti, D. Burckhardt ( MHNG).

PARATYPES: INDONESIA, with the same data as the holotype, 5 Ƌ, 2 ♀. – W . Java, Gede Pangrango Nat. Park way to Cibereum 1500-1620m, 2.-3.VIII.1994, 3 Ƌ leg. R. Schuh ( NHMW, MHNG) . – W. Java, Gede Pangrango, Cibodas Bot. Garden , 1400m, 23.VIII.1994, 1 Ƌ leg. R. Schuh ( NHMW) . – W. Java, Volcan Tangkuban Perahu , 30 km N Bandung, 7.VIII.1984, 1 ♀ leg. J. Robert ( MHNG) . – W. Java, Preanger [=Parahyangan], Pasir Junghuhn, G. Malabar - 1600m, III.1936, 2 ♀ leg. F. C. Drescher ( ZMBC) .

DESCRIPTION: Length 2. 0-2.4 mm, width 1.46-1.75 mm. Body blackish-brown to black. Femora and tibiae about as dark as body. Apex of abdomen, tarsi, palpi and antennomeres I to VI light, almost yellowish, antennomeres VII to XI slightly darker than preceding. Maxillary palpi with palpomere IV tapering, almost 4 times as long as wide. Length ratio of antennomeres as II 8: III 6: IV 13: V 10: VI 10: VII 12: VIII 11: IX 13: X 12: XI 14; antennomere XI somewhat about 2.5 to almost 3 times as long as wide. Head, pronotum and most of elytra very finely, sparsely punctate, puncture intervals on centre of elytral disc mostly about 5 to 10 times as large as puncture diameters. Some punctures near lateral and apical margins of elytra distinctly larger than remaining elytral punctures. Elytra lacking lateral or subapical impression and hump. Prohypomera, metanepisterna, lateral parts of metaventrite and abdominal sternites with very fine, inconspicuous punctation, similar to that on pronotum. Posterior part of mesoventrite lacking distinct punctures. Metaventrite lacking microsculpture, in middle part almost flat, distinctly punctate on small areas at each side of broad, almost impunctate centre. Submesocoxal area about as long as third of shortest interval to metacoxa. Metacoxal process almost impunctate, without microsculpture, lacking FIGS 27-31

(27-29) Pseudobironium schuhi sp. nov., aedeagus in dorsal (27) and lateral (28) views, internal sac (29) in dorsal view. (30, 31) Pseudobironium augur sp. nov., aedeagus in dorsal view (30), internal sac in dorsal view (31); scale bars for aedeagus = 0.2 mm, internal sac = 0.1 mm.

median stria or ridge, with margin slightly concave. Mesotibiae and metatibiae weakly curved, mesotibial ventral spur straight. Abdominal sternite 1 with punctulate microsculpture, in some specimens restricted onto basomedian and apicomedian areas, with very five, sometimes obsolete lateral striae and shallow apicolateral impressions. Following sternites with punctulate microsculpture.

Male: Protarsomeres 1 to 3 moderately widened, narrower than apex of protibia, bearing short ventral setae. Aedeagus (Figs 27-29) 0.81-0.89 mm long, fairly strongly sclerotized. Apical process of median lobe slightly longer than basal bulb, oblique, with ventral side almost straight in lateral view and tip acute. Parameres almost straight and parallel, with apex widened in dorsal view, gradually narrowed and hardly curved in lateral view. Internal sac with mesal guide-sclerites followed by two small, oblique, weakly sclerotized structures joined to membranes bearing very short spines. Apical part of internal sac long, bearing long, spine-like membranous structures.

DISTRIBUTION: Indonesia: Java.

ETYMOLOGY: The species is dedicated to one of its collectors, Rudolf Schuh,

Wiener Neustadt, Austria.

COMMENTS: The species resembles P. subglabrum and P. banonense by its small body size, the dark body, and the finely punctate pronotum and elytra. It differs drastically by its aedeagal characters, in particular by the shape of the parameres which is unique.