Scaphisoma maramag, 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 : 1373-1374

5.2.7.12. Scaphisoma maramag nov.sp. ( Figs 93, 94 )

T y p e m a t e r i a l: Holotype 6: Mindanao, 30 km NW Maramag, 13.-17.May Bagongsilang, 1700m Bolm lgt., 1996 (SMNS).

D e s c r i p t i o n: Length 1.28 mm, width 0.85 mm. Head, thorax and most of elytra black, apical fourth of elytra yellowish. Abdomen brown, femora and tibiae ochreous. Tarsi and antennae yellowish to light brown. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 15/7: IV 30/6: V 45/6: VI 36/6: VII 47/11: VIII 40/9: IX 50/13: X 48/15: XI 64/16. Pronotum very finely and densely punctate, punctures hardly visible at 30 times magnification, lateral contours evenly rounded, lateral margin carinae not visible in dorsal view, lateral striae impunctate. Exposed tip of scutellum minute. Elytra with lateral margin carinae not visible in dorsal view, apical margins slightly rounded, inner apical angles not prominent, situated in level with outer angles; sutural margin somewhat raised; sutural striae fairly deep, bent along pronotal lobe, not extending along basal margins to form basal striae, parallel from level of tip of scutellum toward apices, punctate; adsutural areas narrow, finely punctate. Lateral striae impunctate. Discal punctation very fine, sparse, hardly coarser than pronotal punctation, most puncture intervals at least three times as large as puncture diameters, punctation near basal and apical margins much finer. Hind wings well developed. Hypomera and mesanepisterna smooth. Mesepimera somewhat shorter than intervals to mesocoxae and about four times as long as wide. Metaventrite not microsculptured, with punctuation hardly visible at 50 times magnification, in middle part weakly convex, with two distinct apicomedian impressions, lacking mesal stria. Submesocoxal areas 0.04 mm, about as third of intervals to apical margin, submesocoxal lines convex, conspicuously punctate, with punctures extending laterally along anterior margin of metaventrite. Metanepisterna flat, narrow, slightly narrowed anteriad, inner margins straight, sutures deep. Tibiae straight. Abdomen with distinct strigulate microsculpture and very fine punctation. Sternite 1 with submetacoxal areas about 0.03 mm, about as fourth of intervals to apical margin, submetacoxal lines convex, with distinct marginal punctures.

M a l e: Protarsomeres 1 to 3 weakly widened. Aedeagus ( Figs 93, 94 ) 0.40 mm long, symmetrical, well sclerotized. Apical process of median lobe obliquely inflexed, shorter than basal bulb, with blunt tip and dorsally split valves; articular process inconspicuous. Parameres almost evenly wide between bases and apices, slightly bent in dorsal view, straight in lateral view. Internal sac lacking sclerites, vesicular, bearing very dense, minute spine-like structures.

Etymology: The species epithet is the name of the municipality Maramag in Mindanao.

C o m p a r a t i v e n o t e s: This species may be distinguished from its congeners of similar body-size having sutural striae parallel, not extending along elytral bases, and strigulate abdominal microsculpture, by the conspicuous elytral colour pattern in combination with the coarse puncture row margining the submesocoxal lines and extending laterad mesocoxae.

Figures

Figs 89 - 94: Aedeagi of Scaphisoma in dorsal and lateral views; (89, 90), S. lunabianum nov. sp.; (91, 92), S. maculosum nov. sp.; (93, 94), S. maramag nov. sp. Scale = 0.1 mm.