Pseudobironium pseudobicolor, 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 : 709-713

Pseudobironium pseudobicolor sp. nov. Figs 66, 67

HOLOTYPE: Ƌ, TAIWAN, Pingtung Co., Sandimen Township, Rd 29, env. Saijia 1053m, 13.ii.2012, leg. S. Vít ( MHNG).

DESCRIPTION: Length 2.50 mm, width 1.75 mm. Head and body reddish-brown. Pronotum moderately darkened on large central area, limits of darkened area obsolete. Elytra darkened at base and at apex, not along lateral margins. Inferior part of prohypomera, mesoventrite and metaventrite slightly darkened, remaining ventral surface about as most of pronotum and elytra. Femora and tibiae as most of body, tarsi slightly lighter. Maxillary palpi and antennomeres I to VI yellowish, following antennomeres darkened. Maxillary palpi with palpomere IV tapering, about 4 times as long as wide. Length ratio of antennomeres as II 11: III 7: IV 11: V 13: VI 10: VII 14: VIII 13: IX 15: X 14: XI 20; antennomere XI four times as long as wide. Frons and vertex finely and densely punctate. Pronotum and elytra with similar, dense and fairly coarse punctation, puncture intervals mostly slightly larger to three times as large as puncture diameters. Elytral punctures well delimited. Prohypomeral punctation indistinct. Mesoventrite with apical, erect setae. Metaventrite not microsculptured, middle part weakly convex and almost entirely densely punctate, smooth area limited to narrow mesal surface. Lateral parts of metaventrite very finely punctate, appearing impunctate. Submesocoxal area as long as third of shortest interval to metacoxae. Metacoxal process truncate, smooth, with stria or tubercle. Mesotibiae and metatibiae distinctly curved, mesotibial ventral spur straight. Abdominal sternites with strigulate microsculpture, very finely punctate. Following sternites lacking wrinkles.

Male: Protarsus shorter than protibia. Protarsomeres 1 to 3 moderately widened, much narrower than apex of protibia, bearing fairly long ventral setae. Aedeagus (Figs 66, 67) 0.84 mm long, moderately sclerotized. Basal bulb long. Apical process about as long as basal bulb, weakly inflexed, with ventral side almost straight, except near tip, tip slightly bent and rounded in lateral view. Parameres almost straight in lateral view, somewhat curved posterior base and apically in dorsal view, with inner margin membranous posterior mid-length lobe, narrow near base and gradually widened in lateral view. Membranes of internal sac irregularly, densely folded, without obvious denticles or spines.

DISTRIBUTION: Taiwan.

ETYMOLOGY: The species epithet refers to similarity with P. bicolor .

COMMENTS: This species resembles P. horaki , P. bicolor and P. parabicolor by its maculate pronotum. It differs from P. horaki by the elytra distinctly darkened along apices, and from P. bicolor and P. parabicolor by the hardly darkened middle part of elytral disc. The shape of the parameres in P. pseudobicolor , as seen in lateral view, is unique and provides a sure diagnostic character separating this species from its congeners.

Pseudobironium pubiventer sp. nov. Figs 68-70 HOLOTYPE: Ƌ, MALAYSIA, East Malaysia, Sabah, Mt. Kinabalu Nat. Park 1700m,

16-30.VII.2002, leg. S. Kurbatov & Zimina ( NHMB). PARATYPE ♀: with the same data as the holotype ( MHNG) .

DESCRIPTION: Length 2.20 mm, width 1.52 mm. Head, most of body, femora and tibiae reddish-brown, mesoventrite and metaventrite slightly darkened, brown, elytra near apices, apical abdominal segments, tarsi and antennomeres I to V lighter, FIGS 67-70

(67) Pseudobironium pseudobicolor sp. nov., aedeagus in dorsal view (67); scale bar = 0.2 mm. Pseudobironium pubiventer sp. nov., aedeagus in dorsal (68) and lateral (69) views, internal sac in dorsal view (70); scale bars for aedeagus = 0.2 mm, for internal sac = 0.1 mm.

antennomeres VI to XI infuscate. Head and pronotum densely, very finely punctate, punctures not clearly delimited, puncture intervals mostly about twice to three times as large as puncture diameters. Elytra with punctation fine near sutural striae, becoming coarse laterally, much coarser than on pronotum, with puncture intervals mostly about twice to three times as large as puncture diameters on outer halves, and denser apically, punctures partly about as large as intervals near apices. Elytral lacking lateral impressions and humps, near apices somewhat flattened. Maxillary palpi with palpomere IV about 4 times as long as wide, tapering. Antennae long, length ratio of antennomeres as II 10: III 6: IV 11: V 15: VI 11: VII 14: VIII 13: IX 13: X 14: XI 15; antennomere XI about 2.5 times as long as wide. Prohypomera distinctly, finely punctate and bearing well visible, long pubescence. Mesoventrite im middle swollen, impunctate, obliquely striate. Metaventrite between mesocoxae weakly convex, median part posterior level of mesocoxae flat, with small, shallow impression in middle, distinct pubescence. Metaventrite with strigulate microsculpture on posterior half of median area and between meso- and metacoxae, lacking microsculpture on remaining surface; punctation fairly coarse and dense near inner margin of mesocoxae and in median impression, very fine and sparse on middle of swollen area between mesocoxae, fine and very dense on flattened posterior part of mesal area, very fine and sparse on lateral parts. Submesocoxal area about as third of interval to metacoxae. Metacoxal process carinate laterally, with concave apical margin, punctulate microsculpture, impunctate. Mesotibiae and metatibiae moderately curved, mesotibial ventral spur straight. Abdominal sternites with strigulate microsculpure. Sternite 1 very finely punctate, basal puncture row obsolete, with narrow oblique lateral impression followed by fairly wide lateral impression.

Male: Protarsus shorter than protibia, with tarsomeres 1 to 3 narrower than apex of protibia, bearing long tenent setae. Aedeagus (Figs 68-70) 0.93 mm long. Median lobe with basal bulb moderately convex ventrally, slightly shorter than apical process. Apical process weakly inflexed, ventrally sinuate, near tip oblique in lateral view, tip almost reaching level of apices of parameres. Parameres arcuate in dorsal view and with narrow ventral lobe, in lateral view almost straight. Internal sac with pair of very long mesal guide-sclerites and admesal sclerites consisting of two rods joined ventrally to weakly sclerotized plates. Membranes of internal sac with sparse, extremely short denticles.

DISTRIBUTION: East Malaysia: Sabah.

ETYMOLOGY: The specific epithet is a noun in apposition and refers to the presence of well visible pubescence on the ventral side of the body.

COMMENTS: This species may be distinguished from other small-sized congeners with reddish-brown body by the combination of following characters: antennomere XI clearly more than twice as long as wide, prohypomera pubescent, metaventrite with strigulate microsculpture and fine punctation on its apicomedian part, metacoxal process microsculptured, mesoventrite swollen in middle, tip of median lobe almost in level with apices of parameres. The species is unique in having distinctly pubescent prohypomera and the mesal guides-sclerites of the internal sac very long, almost as long as third of the median lobe. It shares with P. javanum the impressed metaventrite.

Pseudobironium sparsepunctatum ( Pic, 1915) Fig. 71 Amalocera sparsepunctata Pic, 1915: 31 .

Morphoscapha bangueyi Achard, 1920: 134 .

LECTOTYPE A. SPARSEPUNCTATA : ♀, MNHN. Type locality: East Malaysia: Banguey [= Banggi Is.] . Lectotype designation and transfer to Pseudobironium: Löbl, 1982b .

LECTOTYPE M. BANGUEYI : Ƌ, NMPC. Type locality: East Malaysia: Banguey [= Banggi Is.] . Lectotype designation and synonymy: Löbl, 1982b.

ADDITIONAL MATERIAL EXAMINED: INDONESIA, Java, G. Slamat, Batoerraden, 21.X.1928, 2 ex. leg. F. C. Drescher ( ZMBC, MHNG) . – Java, Zuid-Preanger, Patimoean , VI. 1925, 2 ex. leg. F. C. Drescher ( ZMBC, MHNG) . – West Sumatra, south hills above Padangpanjang , 2.-6.IV.1996, 1 ex. leg. S. Bečvář ( MHNG) . – MALAYSIA, East Malayasia , Sarawak, Kapit Distr., Sebong, Belah riv. 9.-23.III.1994, 1 ex. leg. J. Horák ( MHNG) . – Sarawak, Kapit Distr., Sebong, Belah riv. 9.-12.III.1994, 4 ex. leg. S. Bilý ( NMPC, MHNG) . – Sabah, env. Batu Punggul Resort. , 24.VI.-1.VII.1996, lower floor forest vegetation, 3 ex. ( MHNG) .

DISTRIBUTION: East Malaysia: Sarawak, Sabah, Banggi; Indonesia: Java; Philippines: Palawan (see also Löbl, 1982b: 790 for records from East Malaysia and Palawan).

COMMENTS: The species was redescribed and its antenna, maxillary palpus and aedeagus were illustrated in Löbl (1982b: 791). It may be distinguished from the very similar P. languei (Achard) by the shape of the apex of the median lobe and the parameres seen in lateral view (Fig. 71). The record from Thailand in Löbl, 1990: 514 refers to the latter species.