Pseudobironium fujianum, 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 : 682-684

Pseudobironium fujianum sp. nov. Figs 3, 4, 18-20

HOLOTYPE: Ƌ, CHINA, Fujian Prov., Wuyishan City , Guadun Vill. 27°44'N 117°38'E 1200-1300m, 1.VI.2012, leg. Peng & Dai ( SNUC).

PARATYPES: CHINA, with the same data as the holotype but " 1300-1500m, 27.V. 2012 ", 2 ♀ ( SNUC, MHNG) .

DESCRIPTION: Length 3.20-3.35 mm, width 2.20-2.25 mm. Head very dark, almost black, pronotum black, elytra and most of ventral side of body very dark, almost black, apical abdominal segments lighter, femora and tibiae hardly lighter than elytra, tarsi and antennomeres I to VI light, following antennomeres infuscate. Maxillary palpi with palpomere IV tapering, about 4 times as long as wide. Length ratio of antennomeres as II 13: III 12: IV 20: V 20: VI 18: VII 18: VIII 17: IX 18: X 18: XI 20; antennomere XI about 3 times as long as wide. Punctuation on frons very five, puncture diameters much smaller than puncture intervals. Pronotal punctation coarser than that on frons, with punctures not well delimited, intervals mostly about as to three times as large as puncture diameters. Elytra lacking lateral impressions, without humps, impressed apically, punctation very fine near bases, on most of disc distinctly coarser than that on pronotum, with punctures well delimited, puncture intervals mostly about twice to three times as large as puncture diameters. Prohypomera very finely punctate, with inconspicuous pubescence, lacking microsculpture. Mesoventrite hardly swollen mesally, very finely punctate mesally and basolaterally, lacking striae. Metaventrite not microsculptured, hardly convex in median part, with minute impression posterior centre, densely and coarsely punctate on almost entire median part and indistinctly pubescent, puncture diameters mostly larger than puncture intervals, smooth on short FIGS 18-22

(18-20) Pseudobironium fujianum sp. nov., aedeagus in dorsal (18) and lateral (19) views, internal sac (20) in dorsal view. (21, 22) Pseudobironium merkli sp. nov., aedeagus in lateral view (21), internal sac (22) in dorsal view; scale bars for aedeagi = 0.2 mm, internal sac = 0.1 mm.

mesal area between mesocoxae. Lateral parts of metaventrite sparsely, very finely punctate. Submesocoxal area about as long as or slightly longer than half of shortest interval to metacoxa. Area between metacoxae and submesocoxal lines somewhat swollen. Metacoxal process flat, lacking microsculpture, punctate, with truncate margin. Mesotibiae and metatibiae curved, mesotibial ventral spur straight. Abdominal sternites with punctulate microsculpture evanescent on basolateral parts of sternite 1, latter very finely punctate, with large lateral impression posterior mid-length. Following sternites lacking wrinkles.

Male: Protarsus distinctly shorter than protibia, with tarsomeres 1 to 3 moderately widened, narrower than apices of protibia, bearing fairly short tenent setae. Aedeagus (Figs 18-20) 1.05 mm long. Median lobe with basal bulb slightly shorter than apical process, latter laterally inconspicuously tuberculate, hardly inflexed and weakly convex ventrally, with curved, strongly narrowed tip in lateral view. Parameres gradually bent and weakly narrowed to mid-length in dorsal view, almost straight and weakly narrowed toward apices in lateral view. Internal sac with fairly short, proximally widened median guide-sclerites, pair of small, weakly sclerotized, triangular admesal plates joined to folded membranous lobes, followed by section bearing minute points and in apical part with very fine hair-like structures oriented mesally. Flagellum and complex of admesal sclerites bearing invaginated rods absent.

DISTRIBUTION: China: Fujian.

ETYMOLOGY: The species epithet refers to the Province Fujian where the species was found.

COMMENTS: This species is unique by the almost straight parameres and narrow, bent tip of median lobe (lateral view), in the combination. It is similar to P. feai , but may be readily distinguished from the latter by the metaventrite lacking microsculpture and having much shorter smooth mesal surface, and the punctulate abdominal microsculpture. In addition, both species differ drastically by their aedeagal characters.