Scaphobaeocea davaoana, Löbl, Ivan, 2011

Löbl, Ivan, 2011, On the Scaphisomatini (Coleoptera: Staphylinidae: Scaphidiinae) of the Philippines, II, Revue suisse de Zoologie 118 (4), pp. 695-721 : 702-703

Scaphobaeocea davaoana sp. n. Figs 11, 12

HOLOTYPE: Ƌ, E. slope Mt. McKinley , Davao Prov., MINDANAO IX.1946 / Elevation 6400 ft. / CNHM - Philippines Zool. Exped. (1946-47) F. G. Werner leg. ( FMNH).

DESCRIPTION: Length 1.15 mm, width 0.62 mm, dorsoventral diameter 0.55 mm. Head and body uniformly ochraceous, appendages lighter. Thorax and elytra lacking microsculpture, not iridescent. Pronotal and elytral punctation extremely fine, barely visible at magnification 160x. Length ratio of antennomeres as: III 6: IV 7: V 8: VI 7: VII 11: VIII 5: IX 10: X 10: XI 14. Segment III comparatively short, about 3 times as long as wide. Segments IV to VI narrow, as wide as segment III. Segment VII almost 3 times as long as wide. Segment VIII slightly wider than segment VI, almost twice as long as wide. Segments IX and X distinctly larger than segment VII. Segment XI not widened apically, about 2.5 times as long as wide. Tip of scutellum exposed. Elytra without parasutural striae, sutural striae starting at margin of pronotal lobe, hardly curved at base. Hypomeron lacking longitudinal stria. Middle part of metaventrite flat, lacking stria or impression, coarsely and densely punctate, with long pubescence. Sides of metaventrite lacking microsculpture, sparsely, extremely finely punctate, with long pubescence. Mesocoxal lines with fine marginal punctures not extending laterally along mesepimera; submesocoxal areas about 0.03 mm long. Metepisterna flat, exposed portion about 0.05 mm wide, almost parallel-sided, with straight suture. Abdomen with striate microsculpture. Tibiae straight.

FIGS 11-13

(11, 12) Scaphobaeocera davaoana sp. n., aedeagus in dorsal and lateral views. (13) Scaphobaeocera episternalis sp. n., aedeagus in dorsal view. Scale bars = 0. 1 mm.

Male characters. Protarsi with segments 1 to 3 strongly widened, about as wide as protibiae. Aedeagus (Figs 11, 12) 0.37 mm long.

DISTRIBUTION: Philippines: Mindanao.

COMMENTS: The species resembles S. nuda Löbl, 1979 in external characters. Both possess not microsculptured thorax and elytra, very fine punctation, fairly similar antennae, and large exposed portion of metepisterna. Scaphobaeocera davaoana differs from S. nuda by the elytra not darkened at apex and lacking parasutural striae, and, more drastically, by its aedeagal characters. The new species may be distinguished from its congeners by following characters in combination: median lobe with robust, strongly prominent ventral processes, flagellum very narrow, and parameres wide in dorsal view, tapering in lateral view. The shape of the median lobe is similar to that in S. uncata Löbl, 1990 , while the apically widened parameres differ conspicuously. Similar ventral processes are present in B. amicalis Löbl, 2003 , B. stipes Löbl, 1971 , B. tenella Löbl, 1990 and B. uncata Löbl, 1990 . Scaphobaeocera amicalis and B. uncata differ conspicuously by the distal part of the median lobe strongly arcuate and reaching beyond tip of the parameres, B. stipes and B. tenella have the parameres widened in apical half and distinctive internal sac.