Scaphobaeocera basalis, Löbl, 2023

Löbl, Ivan, 2023, On the Scaphidiinae (Coleoptera: Staphylinidae) of Java, Indonesia, Acta Musei Moraviae, Scientiae biologicae 108 (1 - 2), pp. 1-34 : 22-23

Scaphobaeocera basalis sp. nov.

( Figs 21, 22 )

Type material. Holotype female, JAVA: W. Java Cibodas , 50 km E Bogor , 1400 1600 m, 5 6.XI.1989, Löbl, Agosti, Burckh [ardt] #3a ( MBBJ). Paratype male, JAVA: W. Java Cibodas , 50 km E Bogor , 1400 m, 3 6.XI.1989, Agosti, Löbl, Burckhardt #2a ( MHNG).

Description. Length 1.55 1.67 mm, width 0.83 0.95 mm, dorsoventral diameter 0.88 0.98 mm. Head and body blackish, apical abdominal segments and appendages brown. Length/width ratios of antennomeres: III 24 /6: IV 17 /6: V 30 /6: VI 25 /7: VII 41 /9: VIII 25 /8: IX 45 /9: X 38 / 10 XI 43 /10. Pronotum not iridescent, lacking microsculpture, extremely finely punctate. Scutellum completely concealed. Elytron with strigulate microsculpture and weakly iridescent, sutural stria shallow, starting at side of pronotal lobe, parasutural stria hardly visible posterior of elytral mid­length, evanescent anteriad. Elytral punctation as fine and sparse as pronotal punctation. Hypomeron lacking stria, appearing impunctate. Mesoventrite with mesal ridge. Mesanepisternum lacking microsculpture, with punctation very fine and sparse, similar to that on metaventral sides. Metaventrite flattened in middle, lacking mesal stria, finely and densely punctate on posterior two thirds and with short pubescence; lateral parts of metaventrite with strigulate microsculpture; submesocoxal lines parallel, appearing impunctate, submesocoxal areas about 0.02 mm long. Metanepisternum flat, 0.05 0.07 mm wide, narrowing anteriad, with deep, slightly curved suture. Tibiae straight. Ventrites with strigulate microsculpture. Ventrite I with punctation similar to that on metaventral sides; basal puncture row hardly visible.

Male. Protarsomeres I to III strongly widened, with distinct tenent setae, protarsomere I as wide as apex of protibia. Aedeagus ( Figs 21, 22 ) 0.49 mm long.

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

Differential diagnosis. The aedeagal characters suggest relationship with S. lombokensis Löbl, 2015 . The new species may be easily distinguished by its large and much darker body, the lateral parts of metaventrite bearing microsculpture, the tip of the median lobe acute and the parameres gradually widening posteriad.

Figures

Figs 21-27. Male genitalia and antenna. 21 – Scaphobaeocera basalis sp. nov., aedeagus in lateral view, scale = 0.1 mm. 22 – Ditto, internal sac, scale 0.1 mm. 23, 24 – Scaphobaeocera larga sp. nov., aedeagus in dorsal and lateral views, scale = 0.1 mm. 25 – Scaphobaeocera montisgedei sp. nov., antennomeres III to XI, scale = 0.1 mm. 26, 27 – Ditto, aedeagus in dorsal and lateral views, scale = 0.1 mm