Scaphisoma multispinosum, Löbl, 2023

Löbl, Ivan, 2023, On the Scaphidiinae (Coleoptera: Staphylinidae) of Java, Indonesia, Acta Musei Moraviae, Scientiae biologicae 108 (1 - 2), pp. 1-34 : 14

Scaphisoma multispinosum sp. nov.

( Figs 12, 13 )

Type material. Holotype male, JAVA: W. Java Mt. Gede , 50km SE Bogor , 1400 1600 m 5 6.XI.1989 Löbl Agosti, Burckh [ardt] #3 ( MBBJ). Paratypes, 3 males, 3 females, with same data as holotype ( MBBJ, MHNG); 1 female: Java, Preanger, G. Patoeha , 5000 feet, 24.III.1928, F.C. Drescher ( MBBJ).

Description. Lenth 1.50 1.60 mm, width 1.0 1.08 mm. Head and most of body reddish­brown, apices of elytra somewhat lighter, abdomen and appendages ochraceous to yellowish. Length/width ratios of antennomeres III 14 /7: IV 30 /5: V 54 /6: VI 45 /6: VII 55 /9: VIII 45 /7: IX 58 /9: X 57 /10: XI: 70/13. Pronotum and elytra lacking microsculpture. Pronotum with rounded lateral margins, lateral carinae hardly visible in dorsal view, lateral margin stria punctate, discal punctation fine and sparse, on prevailing surface hardly visible at magnification 40 times, becoming somewhat coarser and denser near basal margin, forming patch of rather coarse and dense punctures anterior of pronotal lobe. Tip of scutellum exposed, triangular. Elytron moderately narrowed apicad, with lateral margin rounded; lateral margin carina distinct in dorsal view; lateral margin stria punctate; apical margin rounded; inner apical angle situated in level with outer apical angle; apical crenulation present; sutural margin not raised; sutural stria starting posterior of scutellum, parallel with suture; adsutural area flat, about 0.05 mm wide, to part coarsely punctate; discal punctation very coarse and dense, forming oblique rows extending to apical third of elytron, with puncture intervals smaller than puncture diameters, intervals between rows larger than puncture diameters; punctation near elytral apex irregular und less coarse. Hind wings fully developed. Hypomeron with strigulate microsculpture. Mesanepisternum lacking microsculpture, very finely and sparsely punctate. Mesepimeron seven times as long as wide and twice as long as interval between its tip and mesocoxa. Metaventrite flattened on apicomesal area, lacking impressions or stria, with strigulate microsculpture evanescent on most of lateral areas, punctation coarse on mesal area, very fine on lateral areas; antecoxal puncture rows present. Submesocoxal areas about 0.02 mm long, about as long as tenth of shortest interval to metacoxa; submesocoxal lines parallel, distinctly punctate. Metanepisternum flat, narrowing anteriad, with suture rounded. Tibiae straight. Abdomen with strigulate microsculpture. Ventrite I densely and rather coarsely punctate near intercoxal process, remaining abdominal punctation very fine and sparse; submetacoxal areas 0.05 0.06 mm long, about as long as half of shortest interval to apical margin of ventrite; submetacoxal lines convex, punctate.

Male. Protarsomeres I to III slightly widened. Ventrite VI with triangular, about 0.10 mm long lobe. Aedeagus ( Figs 12, 13 ) 0.63 0.69 mm long.

Etymology. The species epithet is a Latin adjective referring to the spinose internal sac of the aedeagus.

Differential diagnosis. This species is a member of the S. rouyeri group (see LÖBL, 1981) and its aedeagal characters suggest relation to the Philippine S. banguiense Löbl, 1972 . These two species share apical halves of the parameres strongly narrowed and the internal sac bearing two admesal spine bunches. The new species may be distinguished by the spine­bunches interrupted in middle and consisting of long spines uneven in apical and proximal halves of the internal sac. The internal sac of S. banguiense has the spine bunches consisting of evenly long spines, uninterrupted in middle, and the spines much shorter than those of S. multispinosum .

Figures

Figs 8-13. Male genitalia. 8 – Scaphisoma bryanti sp. nov., aedeagus in dorsal view, scale = 0.2 mm. 9 – Ditto, in ventral view, without proximal part of basal bulb, scale = 0.1 mm. 10, 11 – Scaphisoma drescheri sp. nov., aedeagus in dorsal and lateral views, scale = 0.1 mm. 12, 13 – Scaphisoma multispinosum sp. nov., aedeagus in dorsal and lateral views, scale = 0.1 mm.