Scaphobaeocera spinigeroides, Löbl, 2023

Löbl, Ivan, 2023, On the Scaphidiinae (Coleoptera: Staphylinidae) of Java, Indonesia, Acta Musei Moraviae, Scientiae biologicae 108 (1 - 2), pp. 1-34 : 27

Scaphobaeocera spinigeroides sp. nov.

( Figs 28, 29 )

Type material. Holotype male, Java Mt. Gede , 1400 m, 25.V.1966, Rougemont ( MHNG).

Description. Length 1.36 mm, width 0.70 mm, dorsoventral diameter 0.77 mm. Head, thorax, nearly entire elytra and most of ventrite blackish, narrow apical area of elytra, apex of ventrite I and following ventrites brown, femora and tibiae reddish­brown, tarsi and antennae yellowish. Length/width ratios of antennomeres: III 20 /5: IV 20 /5: V 25 /6: VI 22 /6: VII 26 /9: VIII 18 /7: IX 26/13: X 30/14: XI 37 /15. Pronotum not iridescent, lacking microsculpture, extremely finely punctate. Scutellum completely concealed. Elytron with strigulate microsculpture and iridescent, sutural stria deep, starting at side of pronotal lobe, parasutural stria distinct. Elytral punctation as fine and sparse as pronotal punctation. Hypomeron lacking stria, with strigulate microsculpture, appearing impunctate. Mesoventrite with mesal ridge not reaching margin of mesocoxal process, lacking striae. Mesanepisternum extremely finely punctate, lacking microsculpture. Metaventrite lacking microsculpture, impressed in middle, with mesal stria extending from anterior margin to mid­length; with scattered, relatively large punctures and very short pubescence on apicomedian area, extremely finely punctate on lateral areas; submesocoxal lines slightly convex, finely punctate, submesocoxal areas about 0.03 mm long. Metanepisternum flat, 0.06 mm wide, narrowing anteriad, with deep, arcuate suture. Tibiae straight. Abdomen with strigulate microsculpture, very finely punctate. Ventrite I with punctation similar to that on metaventral sides; basal puncture row fine, interrupted in middle, punctures not elongate.

Male. Protarsomere I to III strongly widened, slightly narrower than apex of protibia. Aedeagus ( Figs 28, 29 ) 0.44 mm long.

Etymology. The species epithet refers to the similarity of the new species with S. spinigera .

Differential diagnosis. This new species is similar and related with S. spinigera Löbl, 1979 . It may be distinguished by the antennomeres III and IV evenly long, the antennomere XI clearly longer than the antennomere X, the metaventrite lacking microsculpture, the metanepisterna narrower and with rounded suture, the spine­like process of the median lobe much shorter, and the parameres not extending posterior of the tip of the median lobe and obliquely truncate at apex.

Figures

Figs 28-36. Male genitalia. 28, 29 – Scaphobaeocera spinigeroides sp. nov, aedeagus in dorsal and lateral views, scale = 0.1 mm. 30 – Scaphobaeocera truncata sp. nov., aedeagus in lateral view. 31-33 – Scaphoxium corporaali sp. nov. 31 - Aedeagus in dorsal view, scale = 0.1 mm. 32 – Ditto, internal sac, scale = 0.1 mm. 33 Ditto, paramere in ventral view, scale = 0.1 mm. 34-36 – Scaphoxium dentatum sp. nov. 34 - Aedeagus in dorsal view, scale = 0.1 mm. 35 – Ditto, internal sac, scale = 0.05 mm. 36 – Ditto, paramere in ventral view, scale = 0.1 mm.