Baeocera yamdena, Löbl, 2014

Löbl, Ivan, 2014, On the Scaphidiinae (Coleoptera, Staphylinidae) of the Moluccas, Mitteilungen Der Schweizerischen Entomologischen Gesellschaft 87, pp. 49-60 : 51-53

Baeocera yamdena sp. n. (Figs 4 - 7 )

Holotype ♂ labelled: INDO: Maluc F911110 Tanimbar: Yamdena 22 km N Saumlaki . Ink' 1 D. l a k i1. D Agosti 11.9.91 (10) ( MHNG).

Paratypes: 2 ♀ ♀, with the same data as the holotype ; 1 ♀, INDO: Maluc F911146 Tanimbar Isl. Yamdena Bomaki, NW of Saumlaki leaflitt Agosti 10.9.91; 1 ♀, INDO: Maluc F911107 Tanimbar : Yamdena Isl. 22 km N Saumlaki litter Agosti 11.9.91 (9) (all MHNG) .

Description. Length 1.06-1.17 mm, width 0.76-0.85 mm. Head and body uniformly reddish-brown, appendages lighter than body. Antennae comparatively short, length ratio of antennomeres as: III 25: IV 25: V 34: VI 30: VII 35: VIII 30: IX 32: X 35: XI 47; antennomeres III to VII similar, narrow, VII and VIII weakly widened, IX moderately widened, X and XI much wider, each about 3 times as long as wide. Lateral contours of pronotum and elytra continuously convex. Pronotum not microsculptured, with sparse and very fine punctation, setation hardly visible at 50x magnification. Lateral margins of pronotum convex, anterior margin narrow, basal lobe small. Scutellum concealed. Elytra not microsculptured, fairly narrowed apically, almost completely covering abdomen, lateral margins rounded, lateral margin carinae not visible in dorsal view, suturai striae complete, curved along bases and lengthened to form basal striae extended about to basal-mid-width, not joined to lateral striae. Elytral punctation coarse and dense, with punctures to part about as large as puncture intervals. Lateral striae coarsely punctate, epipleural striae impunctate. Metathoracic wings reduced. Hypomera smooth. Mesepimera fairly narrow, about 4 times as long as wide and about twice as long as intervals to mesocoxae. Metaventrite weakly convex in middle, lacking impression, all over very densely and coarsely punctate, with punctures about as large as or distinctly larger than puncture intervals. Submesocoxal areas 0.02 mm long, shortest interval to metacoxae about 0.05 mm. Metanepisternum almost completely concealed, its suture indicated by outer puncture row of metaventrite. Sternite 1 with coarse and very dense punctation covering entire surface, basal punctures not elongate, lacking basal wrinkles. Following sternites very finely punctate. Protibiae and metatibiae straight, mesotibiae hardly curved.

Male sexual characters. Protarsomeres 1 to 3 hardly widened. Aedeagus ( Figs 5-7 ) 0.28 mm long, symmetrical. Median lobe weakly sclerotized, with basal process inconspicuous, apical process gradually narrowed, tip fairly blunt in lateral view, ventral side almost evenly concave. Paramères narrow, lacking lobes, almost straight in dorsal view, somewhat sinuate in lateral view. Internal sac with basal complex of sclerites, membranes lacking denticulate or hair-like structures.

Female sexual characters. Protarsomeres 1 to 3 not widened. Ovipositor (Fig. 4) with apically strongly narrowed distal gonocoxite, single long apical seta, and lacking gonostyle.

Distribution. Moluccas, Tanimbar group, Yamdena Island.

Etymology. The species epithet is the name of the island Yamdena.

Comments. This species is a member of the B. lenta group, and shares most diagnostic characters with B. punctata (Löbl, 1975) from Papua New Guinea. It may be distinguished from B. punctata by the lighter, reddish body colour, the antennomere m6f€ XI well 1.3 times longer than X (only 1.1 times in B. punctuta), denser punctation tation on sternite 1, the apical process of the median lobe longer, reaching to level of apical tenth of the paramères.

Figures

Figs 1-3. Baeocera agostii sp. n., aedeagus in dorsal view (1), same, in lateral view (2), ovipositor (3); scale bar 0.1 mm. Fig. 4. Baeocera yamdena sp. n., ovipositor. Scale bar 0.05 mm.

Figs 5-7. Baeocera yamdena sp. n., aedeagus in dorsal view (5), same, in lateral view (6); scale bar 0.1 mm. Internal sac in dorsal view (7); scale bar 0.05 mm.