Scaphoxium shavrini, Löbl, 2021

Löbl, Ivan, 2021, Contribution to the knowledge of the Scaphisomatini (Coleoptera: Staphylinidae: Scaphidiinae) of Mindanao, Philippines, Biodiversity, Biogeography and Nature Conservation in WALLACEA and NEW GUINEA, Riga: The Entomological Society of Latvia, pp. 265-272 : 271-272

Scaphoxium shavrini sp. nov. (

Figs 13–15 )

Holotype ♂ MHNG: Mindanao , Araibo, Pantukan , Compostela Valley, 900 m, Candalaga / Mts., 7°16’35.3’’N, 126°10’12.8’’E, 4.5.2019 Shavrin A.V. leg .

Derivatio nominis: Patronymic. The species is dedicated to its collector Alexei V. Shavrin (Daugavpils, Latvia), a well-known expert of rove beetles.

Description: Length 1.54 mm, width 0.77 mm, dorsoventral diameter 0.86 mm. Head and most of body evenly very dark reddish-brown, apical abdominal segments, femora and tibiae lighter, tarsi lighter than tibiae, antennae brown. Length/ width rations of antennomeres as: III 20 /6: IV 19 /6: V 26 /6: VI 22 /7: VII 39 /11: VIII 25/11: IX 38 /13: X 33 /13: XI 48 /15. Pronotal punctation very fine, hardly visible at 50 times magnification. Scutellum concealed. Elytral punctation distinct, fine and dense, sutural striae starting about 0.20 mm posterior of level of pronotal lobe. Mesoventrite not striate, impressed and with low mesal ridge narrowed apically. Median part of metaventrite slightly convex, with irregular transverse row of extremely fine punctures. Lateral parts of metaventrite appearing impunctate near metacoxae, each with dense patch of conspicuously coarse punctures and oblique ridge. Mesocoxal areas about 0.05 mm, almost as halves of shortest intervals to metacoxae. Metanepisterna slightly convex, about 0.06 mm wide, with curved, deep, apically shortened sutures. Ventrite I with few distinct basal punctures, not microsculptured. Following ventrites and exposed tergites with punctulate microsculpture and extremely fine punctation. Male segments I to III of protarsi slightly widened. Aedeagus ( Figs 13–15 ) 0.68 mm long.

Differential diagnosis: This new species is likely related with S. alesi LÖbl, 2011 . It may be distinguished by the dark body-colour, the shorter sutural striae of the elytra, the sides of the metaventrite bearing dense and coarse punctures, the shape of the angular subapical parameral lobes and the presence of strongly sclerotized denticles in the internal sac of the aedeagus.

Figures

Figures 11–15. Scaphidiid aedeagi. 11–12 – Scaphobaeocera lata sp. nov., dorsal (11) and lateral (12) view [scale bar 0.1 mm]; 13–15 – Scaphoxium shavrini sp. nov. 13 – Aedeagus, dorsal view [scale bar 0.1 mm]; 14 – Parameres, ventral view [scale bar 0.1 mm]; 15 – Internal sac [scale bar 0.1 mm].