Scaphisoma subpunctulum, Ivan Löbl & Ryo Ogawa, 2016

Ivan Löbl & Ryo Ogawa, 2016, On the Scaphisomatini (Coleoptera, Staphylinidae, Scaphidiinae) of the Philippines, IV: the genera Sapitia ACHARD and Scaphisoma LEACH, Linzer biologische Beiträge 48 (2), pp. 1339-1492 : 1355-1356

5.2.2.6. Scaphisoma subpunctulum nov.sp. ( Fig. 52 )

T y p e m a t e r i a l: Holotype ♀: Burungkot, Upi, Cotabato Prov., Mindanao Elev. 1500 ft. I, 1-9, 1947 / Lot 167; on fermenting sap of freshly cut tree / CNHM-Philippine Zool. Exped. (1946-47) F.G.Werner leg. (FMNH).

D e s c r i p t i o n: Length 1.10 mm, width 0.83 mm. Head and body, including apical abdominal segments evenly reddish-brown, appendages light brown to yellowish. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 6/6: IV 6/6: V 16/7: VI 29/8: VII 38/10: VIII 26/8: IX 33/10: X 35/11: XI 45/11 ( Fig. 52 ). Pronotum very finely and sparsely punctate, with lateral margins evenly rounded, lateral margin carinae not visible in dorsal view, lateral striae impunctate. Exposed tip of scutellum small. Elytra not flattened, with lateral margin carinae not visible in dorsal view, apical margins rounded, inner apical angles not prominent, situated in level with outer angles; sutural margin raised, sutural striae deep, not extending along basal margin, in basal fifth strongly converging, posterior basal fifth gradually, weakly converging, finely punctate; adsutural areas fairly wide near bases, flat, each with single very fine puncture row, lateral striae impunctate. Elytral disc with punctation hardly visible and similar to pronotal on almost entire surface. Patch of dense and coarse puncture present on centrolateral, impressed areas. Hind wings fully developed. Hypomera and mesanepisterna smooth. Mesepimera indistinct, fused. Metaventrite not microsculptured and very finely punctate. Median part of metaventrite weakly convex, with two admesal impressions; antecoxal puncture rows absent. Submesocoxal areas 0.04 mm, about as third of intervals to metacoxae, submesocoxal lines convex, very finely punctate, punctures not extended by striae. Metanepisternum flat, impressed, narrowed anteriad, inner margin curved, suture deep. Tibiae straight. Abdomen lacking obvious microsculpture and very finely and sparsely punctate; sternite 1 with submetacoxal areas 0.08 mm, about 1.5 times as intervals to apical margin of sternite, submetacoxal lines strongly convex, very finely punctate.

E t y m o l o g y: The species epithet is derived from the Latin sub, meaning below, and punctulum, referring to small punctures.

C o m p a r a t i v e n o t e s: This species may be readily distinguished from members of the group as from all other Philippine congeners, with the exception of S. centripunctulum, by the elytral punctation. It is unique in having antennomeres III and IV evenly short in combination with impressed patch of coarse elytral punctures.

Figures

Figs 52 - 57: Scaphisoma; (52), antenna of S. subpunctulum nov. sp.; (53, 54), S. diversum nov. sp., aedeagus in dorsal and lateral views; (55, 56), S. blefusca nov. sp., aedeagus in dorsal and lateral views; (57), S. ilonggo nov. sp., aedeagus in dorsal view. Scale = 0.1 mm.