Pseudobironium montanum, 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 : 685-687

Pseudobironium montanum sp. nov. Figs 24-26

HOLOTYPE: Ƌ, CHINA: Yunnan [CH07-28], Nujiang Lisu Aut. Pref., Gaoligong Shan , side valley, 19 km NW Liuku, 25°59'02''N 98°42'23''E, 2730m, devast. prim. forest, litter sifted, 9.VI.2007, leg. A. Pütz ( PCAP).

DESCRIPTION: Length 2.65 mm, width 1.90 mm. Head and most of body black, very narrow basal and apical margins of pronotum reddish, apical abdominal segments, femora and tibiae dark brown, tarsi and antennomeres I to VI light, yellowish-brown, following antennomeres brown. Maxillary palpi with palpomere IV tapering, about 4 times as long as wide. Length ratio of antennomeres as II 13: III 9: IV 15: V 15: VI 12: VII 16: VIII 15: IX 17: X 15: XI 16; antennomere XI about twice as long as wide. Pronotal punctation irregular, consisting of not well delimited punctures as small as those on head and partly distinctly larger, puncture intervals mostly about five times as large as puncture diameters. Elytral punctation fine near base, similar to pronotal punc- FIGS 23-26

(23) Pseudobironium merkli sp. nov., aedeagus in dorsal view. (24-26) Pseudobironium montanum sp. nov., aedeagus in dorsal (24) and lateral (26) views, internal sac (25) in dorsal view; scale bars for aedeagi = 0.2 mm, internal sac = 0.1 mm.

tation, dense and coarse on remaining surface, much coarser than on pronotum, with punctures well delimited, puncture intervals mostly about twice to three times as large as puncture diameters. Apical part of elytra impressed. Prohypomera very finely punctate. Middle of mesoventrite distinctly punctate, lacking mesal ridge or line. Metaventrite with microsculpture on small area posterior submesocoxal areas, punctation coarse and dense covering most of median part, narrow anteriomesal area impunctate, apicomedian part flattened, lateral parts very finely punctate. Submesocoxal area about as long as third of interval to metacoxa. Metacoxal process distinctly punctate, with weekly concave margin, lacking tubercle or ridge. Meso- and metatibae fairly curved, mesotibial ventral spur straight. Abdomen with punctulate microsculpture, sternite 1 very finely punctate.

Male: Protarsus shorter than protibia, with tarsomeres 1 to 3 distinctly widened, much narrower than apex of protibia. Aedeagus (Fig. 24-26) 0.92 mm long. Median lobe with basal bulb shorter than apical process, latter moderately inflexed, with hooklike tip in lateral view. Parameres evenly arcuate, lacking membranous lobes, widest in middle parts in lateral view, almost straight and widest in apical halves in dorsal view. Internal sac without flagellum, with mesal guide-sclerites and pair of narrow, curved lateral sclerites in middle part, membranes with apical denticulate structures.

DISTRIBUTION: China: Yunnan.

ETYMOLOGY: The species epithet is a Latin adjective meaning mountain.

COMMENTS: This species is similar to P. bilobum and P. merkli . It may be distinguished from them as from other congeners, P. subovatum excepted, by the shape of the tip of the median lobe. It differs drastically from P. subovatum by the shape of the parameres that are narrow near base in lateral view. See also comments under P. merkli .