Scaphisoma neglectoides, Löbl, 2023

Löbl, Ivan, 2023, On the Scaphidiinae (Coleoptera: Staphylinidae) of Java, Indonesia, Acta Musei Moraviae, Scientiae biologicae 108 (1 - 2), pp. 1-34 : 15

Scaphisoma neglectoides sp. nov.

( Figs 14, 15 )

Type material. Holotype male, F. C. DRESCHER G. Tangkoeban Prahoe 4000 5000 Voet Preanger , Java 13.VII.1934 [printed, date handwritten] ( MBBJ). Paratypes, 2 females, with same data as holotype ( MBBJ, MHNG); 1 female, Java, Banjoewangi , 1909, Mac Gillavry ( NBCL).

Description. Lenth 2.0 2.05 mm, width 1.37 140 mm. Body light brown, legs ochraceous, antennae light brown. Length/width ratios of antennomeres III 13/13: IV 11/12: V 38 /12: VI 48 /13: VII 65 /16: VIII 46 /14: IX 54 /15: X 55 /16: XI: 60/16. Pronotum and elytra lacking microsculpture. Pronotum with rounded lateral margins, lateral carinae hardly visible in dorsal view, lateral margin stria impunctate, discal punctation extremely fine, hardly visible at magnification 60 times. Tip of scutellum exposed, triangular. Elytron moderately narrowed apicad, with lateral margin oblique posterior of basal third; lateral margin carina concealed in dorsal view; lateral margin stria impunctate; apical margin truncate; inner apical angle situated in level with outer apical angle; apical crenulation present; sutural margin not raised; sutural stria shallow, parallel with suture, curved at base and forming basal stria reaching outer third of elytral basal width; adsutural area flat, near scutellum about 0.06 mm wide, very finely punctate; punctation on basal third of disc scattered, slightly coarser than that on pronotum, punctures poorly delimited; punctation becoming denser and less fine apicad, puncture intervals posterior basal third mostly about three to five times as large as puncture diameters. Hind wings fully developed. Hypomeron smooth. Venter of mesothorax and metathorax lacking microsculpture, very finely and sparsely punctate. Mesepimeron about three times as long as wide and nearly as long as interval between its tip and mesocoxa. Metaventrite lacking impressions or stria; antecoxal puncture rows absent. Submesocoxal areas about 0.05 mm long, about as long as fourth of shortest interval to metacoxa; submesocoxal lines convex, distinctly punctate. Metanepisternum flat, narrowing anteriad, with suture straight except at rounded anterior angle. Protibiae straight, mesotibiae and metatibiae slightly curved. Abdomen very finely and sparsely punctate. Ventrite I lacking microsculpture, with submetacoxal areas 0.05 0.06 mm long, about as long as fifth to fourth of shortest interval to apical margin of ventrite; submetacoxal lines convex, coarsely punctate. Following ventrites with punctulate microsculpture.

Male. Protarsomeres I to III distinctly widened, narrower than apex of protibia. Ventrite VI with rounded lobe. Aedeagus ( Figs 14, 15 ) 0.68 mm long.

Etymology. The species epithet refers to the similar species S. neglectum , the Greek oides means similar.

Differential diagnosis. The aedeagus suggest relationship with the species of the S. subalpinum group currently known only from temperate areas of the northern hemisphere. The structures, such as the simple flagellum, are similar to those of S. neglectum Löbl, 2003 and S. styloides Löbl, 2000 from China. The new species may be easily distinguished by the short antennomere III, the light body colour, the fine elytral punctation and the metaventrite lacking impression and entirely very finely punctate.

Figures

Figs 14-20. Male genitalia. 14, 15 – Scaphisoma neglectoides sp. nov., aedeagus in dorsal and lateral views, scale = 0.1 mm. 16, 17 – Scaphisoma planatoides sp. nov., aedeagus in dorsal and lateral views, scale = 0.2 mm. 18-20 – Scaphisoma posticum sp. nov. 18 – Aedeagus in dorsal view, scale = 0.1 mm. 19 – Ditto, paramere in ventral view, scale = 0.05 mm. 20 – Ditto, internal ac in dorsal view, scale = 0.05 mm.