Scaphobaeocera tengchinensis, Löbl, 2020

Löbl, Ivan, 2020, Four new Taiwanese species of Scaphobaeocera CSIKI (Coleoptera, Staphylinidae, Scaphidiinae), Linzer biologische Beiträge 52 (1), pp. 327-335 : 331

Scaphobaeocera tengchinensis nov.sp. ( Figs 11-14 )

Type material: Holotype ♂: TAIWAN Kaohsiung Hsien, Tengchin 1610 m 24.IV.1990 A. Smetana [T20] ( MHNG) . Paratype ♂: with the same data as the holotype ( MHNG).

Description: Length 1.24 mm, width 0.67 mm, dorsoventral diameter 0.73 mm. Head, pronotum and elytra blackish with weak reddish shine, ventral side of thorax and ventrite I dark brown, abdomen gradually light apically, with apical segments yellowish. Femora reddish-brown, tibiae, tarsi and antennae ochraceous to yellowish. Length/width ratios of antennomeres as: III 22/7: IV 23/7: V 28/7: VI 26/8: VII 33/12: VIII 26/9: IX 33/13: X 34/13: XI 42/15. Pronotum very finely punctate, not microsculptured. Scutellum concealed. Elytra not iridescent, with hardly visible parasutural striae, sutural striae deep, curved at base, discal punctation about as fine as pronotal punctation, microsculpture absent. Hypomera not microsculptured, smooth, lacking longitudinal stria. Middle area of metaventrite flat, entirely densely, distinctly punctate, with punctures to part about as large as puncture intervals; pubescence long, median stria and median impression absent. Lateral parts of metaventrite very finely and sparsely punctate, not microsculptured. Submesocoxal areas about 0.02 mm, submesocoxal lines distinctly punctate. Metanepisterna about 0.05 mm wide, flat, not narrowed posteriad, impunctate, with straight suture reaching metepimera. Tibiae straight. Exposed ventrites bearing strigulate microsculpture, very finely punctate, ventrite I with not elongate basal punctures.

Male characters: Protarsomeres 1 to 3 widened, distinctly narrower than apices of tibiae. Aedeagus ( Figs 11-14 ) 0.42-0.43 mm long. Median lobe with basal bulb moderately wide, apical process asymmetrical, strongly inflexed, almost long as basal bulb, ventral side oblique, tip acute, hardly bent in lateral view, blunt in dorsal view. Articular process not prominent. Parameres symmetrical, oblique, reaching posterior level of tip of median lobe, slightly narrowed apically in dorsal view, oblique and widened apically in lateral view. Internal sac with narrow, convoluted flagellum forming two complete loops, widened and sinuate in proximal section (lateral view), capsular in dorsal view.

Differential diagnosis: This species has an aedeagus similar with that of S. sabapensis LÖBL, 1990 , described from Thailand and subsequently reported from the Philippines ( LÖBL 2011b). The proximal sections of the flagellum are, however, quite distinctive, being in S. sabapensis oblique, weakly widened and not joint to a proximal capsule. The new species may be also distinguished by the median part of the metaventrite not impressed, and the pronotum and elytra not iridescent and lacking distinct microsculpture.

Etymology: The species epithet is derived from the name of the type locality.

Figures

Figs 8-14: Scaphobaeocera, aedeagi; (8, 9) S. montana nov.sp., in dorsal and lateral views, scale = 0.1 mm; (10) Ditto, flagellum and proximal sclerite of internal sac, dorsal view, scle = 0.05 mm; (11, 12) S. tengchinensis nov.sp., in dorsal and lateral views, scale = 0.1 mm; (13, 14) Ditto, flagellum in dorsal and lateral views, scale = 0.05 mm.