Scaphobaeocera hamata, Lobl, 2011

Löbl, Ivan, 2011, On the Scaphisomatini (Coleoptera: Staphylinidae: Scaphidiinae) of the Philippines, II, Revue suisse de Zoologie 118 (4), pp. 695-721 : 707-708

Scaphobaeocera hamata sp. n. Figs 24-26

HOLOTYPE: Ƌ, Philippines: Mt. Makiling , Laguna Prov., 4 km SE Los Banos 12-IV- 1977 / berlese rotten logs L. E. Watrous ( MHNG).

PARATYPES: 8 Ƌ, 3 ♀, with the same data as the holotype. – 3 Ƌ , 1 ♀, with the same data but 9-IV-1977. – 1 Ƌ , 1♀, with the same data but 8-IV-1977 / berlese leaf litter ; 1♀, with the same data but 8-IV-1977 / berlese litter along stream. – 2 Ƌ , 1 ♀, with the same data but 11-IV-1977 / berlese debris under bark (all MHNG) .

DESCRIPTION: Length 1.25-1.30 mm, width 0.66-0.70 mm, dorsoventral diameter 0.66-0.72 mm. Head and body ochraceous, appendages lighter, elytra sometimes slightly darkened near apex. Thorax and elytra microsculptured, elytra and often also pronotum weakly iridescent. Pronotal and elytral punctation very fine, dense, visible at magnification 32x. Length ratio of antennomeres as: III 5: IV 6: V 9: VI 8: VII 11: VI- II 7: IX 11: X 10: XI 15. Segments III and IV similar, narrow, respectively 2.5 and 3 times as long as wide. Segments V and VI slightly wider than segment IV. Segment VII about 3 to 3.5 times as long as wide. Segment VIII about as wide as segment VII and almost twice as long as wide. Segments IX and X much wider than segment VII. Segment XI not widened apically, about 2.5 times as long as wide. Tip of scutellum exposed. Elytra without or with hardly visible parasutural striae, sutural striae starting at pronotal lobe. Hypomeron not microsculptured, lacking longitudinal stria. Middle part of metaventrite flat, with minute impression, densely punctate, pubescence short and very dense. Sides of metaventrite microsculptured, sparsely, extremely finely punctate, with fairly long pubescence. Mesocoxal lines with fine marginal punctures not extending laterally along mesepimera; submesocoxal areas about 0.01-0.02 mm long. Metepisterna slightly convex, exposed portion 0.05-0.06 mm wide, narrowed proximally, with straight suture. Abdomen with hardly visible striate microsculpture, punctation very fine. Basal punctures of ventrite 1 not elongate and fine. Tibiae straight.

Male characters. Protarsi with segments 1 to 3 strongly widened, almost as wide as protibiae. Aedeagus (Figs 24-26) 0.32-0.42 mm long.

HABITAT: Evergreen rain forest, under bark, in rotten wood and leaf litter.

DISTRIBUTION: Philippines: Luzon.

COMMENTS: The aedeagal characters suggest relationship to S. data and S. monticola . Scaphobaeocera hamata may be readily distinguished from the former by the lighter body color and from the latter by the sutural striae of the elytra reaching elytral base. See also comments under S. data .