Scaphobaeocera truncata, Löbl, 2023

Löbl, Ivan, 2023, On the Scaphidiinae (Coleoptera: Staphylinidae) of Java, Indonesia, Acta Musei Moraviae, Scientiae biologicae 108 (1 - 2), pp. 1-34 : 27-28

Scaphobaeocera truncata sp. nov.

( Fig. 30 )

Type material. Holotype male, JAVA: W. Java Cibodas , 50 km E Bogor , 1400 m, 3 6.XI.1989, Agosti, Löbl, Burckhardt #2a ( MBBJ). Paratype male, with the same data as holotype ( MHNG).

Description. Length 1.21 1.25 mm, width 0.66 0.68 mm, dorsoventral diameter 0.74 0.76 mm. Head, pronotum, elytra, venter of thorax and ventrite I dark brown to blackish, following ventrites light brown to yellowish. Femora rufous, tibiae, tarsi and antennae yellowish. Length/width ratios of antennomeres: III 16 /6: IV 23 /6: V 20 /6: VI 22 /7: VII 27/10: VIII 20 /8: IX 31/10: X 34 /11: XI 40 /13. 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 absent. Elytral punctation as fine and sparse as pronotal punctation. Ventral side of thorax lacking microsculpture. Hypomeron lacking stria, appearing impunctate. Mesoventrite with mesal ridge. Mesanepisternum and sides of metaventrite very finely and sparsely punctate. Metaventrite flat in middle, lacking mesal stria, finely and densely punctate on entire mesal area, with short pubescence; submesocoxal lines parallel, appearing impunctate, submesocoxal areas hardly 0.02 mm long. Metanepisternum flat, 0.03 mm wide, not narrowing anteriad, with shallow, slightly curved suture. Tibiae straight. Ventrites with strigulate microsculpture. Ventrite I with punctation similar to that on metaventral sides; basal puncture row absent.

Male. Protarsomeres I to III distinctly widened, narrower than apex of protibia. Aedeagus ( Fig. 30 ) 0.32 0.34 mm long.

Etymology. The species epithet is a Latin adjective meaning truncate.

Differential diagnosis. The aedeagal characters of this species suggest relationship with S. lombokensis and S. basalis . It is distinguished from them by the shape of the basal section of the flagellum. This new species differs from S. lombokensis notably by the gradually widening parameres and the dark body. It may be easily distinguished from S. basalis by its small body size and the truncate apex of the median lobe.

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.