Scaphobaeocera gemina, Ivan Löbl, 2017

Ivan Löbl, 2017, New species and records of Scaphobaeocera CSIKI from New Guinea (Coleoptera: Staphylinidae: Scaphidiinae), Mitteilungen der Münchner Entomologischen Gesellschaft 107, pp. 33-41 : 36

Scaphobaeocera gemina sp. n.

( Figs 4 - 7 )

Type material. Holotype ♂: PAPUA NG: Morobe Biaru Rd, Mt Kolorong 2200m, 04.VI.1992 G. CUCCODORO #16 A ( MHNG).

Paratypes: 2 ♂♂, 2 ♀♀, 6 specimens sex not examined, same data as the holotype; 1 ♀, same data but #16B [vegetational debris, 50% bamboo leaves], 1 ♂, 1 ♀, same data but 2 000m, 03.VI.1992 #15C [old wet rotting trunk]; 1 ♀, same data as the holotype but 01.VI.1992, #13C [singled]; 1 ♂, 4 ♀♀, same data but 2250 m, 02.VI.1992, # 14F [moss on bark and vegetational debris]; 1 ♂, same data but 2200m, 07.VI.1002, #18C [moss on trees]; 2 ♂♂, 2 ♀♀, same data but 08.VI. 1992, #19A [moss on ground and vegetational debris] (all MHNG); 2 ♀♀, NEW GUINEA /NE/ Mt. Wilhelm Keglsugl , 10.-14.VIII.1969 /No. NG Mt-B.53 / leg. Dr. J. Balogh (HNMB); 1 ♂, NEW GUINEA /NE/ Wau Eddy Creek , 2050 m 30.VIII.1968 / No. NG-W-B.50. leg. Dr. J. Balogh (HNMB); 1 ♂, PAPUA NG: Morobe Bulldog Rd , Mt. Naiko 2750m, 28.VI.1992, G. Cuccodoro #25C [vegetational debris on moss, in Ericaceae /bamboo forest] ( MHNG).

Description. Length 1.10-1.25 mm, width 0.67-0.78 mm, dorsoventral diameter 0.72-0.85 mm. Head, pronotum, elytra and ventral side of thorax dark reddish-brown, hypomera usually somewhat lighter than pronotum, abdomen and femora light reddish-brown, tibiae, tarsi and antennae lighter than femora. Length/width ratios of antennomeres as: III 14/7: IV 19/7: V 24/6: VI 16/7: VII 27/12: VIII 18/11: IX 25/12: X 27/13: XI 64/18 (Fig. 4). Pronotum very finely punctate, not microsculptured. Tip of scutellum barely visible. Elytra not iridescent, without parasutural striae, sutural striae deep, curved near base, discal punctation about as fine as pronotal punctation, microsculpture absent. Hypomera not microsculptured, smooth, lacking longitudinal stria. Middle area of metaventrite weakly convex, lacking median stria, smooth on small central area, with dense and fairly coarse punctation around smooth centre, many punctures larger than puncture intervals, pubescence short. Lateral parts of metaventrite very finely punctate, not microsculptured. Submesocoxal areas about 0.02 mm, submesocoxal lines impunctate. Metanepisterna about 0.09-0.10 mm wide, flat, impunctate, not or weakly narrowed anteriad, with suture usually somewhat curved, reaching metepimera. Tibiae straight. Sternite 1 not microsculptured, very finely punctate, basal punctures coarse. Following sternites with punctulate microsculpture.

Male: Protarsomeres 1 to 3 slightly widened, narrower than apices of protibiae. Aedeagus as in Figs 5-7, 0.38-0.48 mm long.

Etymology. The species epithet is a Latin adjective, meaning coupled.

Differential diagnosis. This species is very similar with S. remota LÖBL, 1981 . It may be distinguished from the latter by the absence of elytral microsculpture and iridescent body, the shorter antennae, and the significantly wider aedeagal flagellum. The aedeagal characters of S. gemina suggest relationships with S. japonica (REITTER, 1880) and S. stephensoni LÖBL, 1988. These two species differ drastically in having distinct hypomeral striae, microsculptured pronotum and elytra, and elytra with parasutural striae.

Figures

Figs 1-3. Scaphobaeocera balkei sp.n., holotype; 1. ‒ Antennomeres 2 to 11; 2, 3. ‒ Aedeagus, internal sac extruded, in dorsal and lateral views. Figs 4, 5. Scaphobaeocera gemina sp.n.; 4. ‒ Holotype,antennomeres 3 to 11; 5. ‒ Paratype,aedeagus in dorsal view. Scale = 0.1 mm.

Figs 6, 7. Scaphobaeocera gemina sp.n.; 6. ‒ Holotype,aedeagus in lateral view; 7. ‒ Ditto, paratype. Figs 8-11. Scaphobaeocera lycocorax sp.n.; 8. ‒ Holotype,aedeagus in dorsal view; 9. ‒ Paratype,aedeagus in lateral view, without internal sac; 10. ‒ Paratype,internal sac in lateral view; 11. ‒ Holotype,internal sac in dorsal view. Scale = 0.1 mm.