Scaphisoma lineare, 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 : 1361-1362

5.2.5.1. Scaphisoma lineare nov.sp. ( Figs 65-68 )

T y p e m a t e r i a l: Holotype 6: Luzon: Lagunas Mt. Makiling (summit rd) 600m, 21- 22.XI.1995, I.Löbl, fungi on logs (MHNG). Paratypes: with the same data as the holotype, 1 6, 1♀ (MHNG); with the same data but 28.XI., 1 6 (MHNG).

D e s c r i p t i o n: Length 1.12-1.23 mm, width 0.86-0.90 mm. Head, pronotum and elytra dark reddish-brown, ventral side of thorax and sternite 1 lighter than dorsum of body, apical abdominal segments and appendages light, almost yellowish. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 7/7: IV 11/6: V 20/8: VI 25/9: VII 39/14: VIII 24/9: IX 35/13: X 32/13: XI 45/14. Pronotum finely and densely punctate, punctures at 20 times magnification visible, lateral margins almost oblique, lateral margin carinae hardly visible in dorsal view, lateral striae punctate. Tip of scutellum exposed. Elytra convex, with lateral margin carinae visible in dorsal view, apical margins rounded, inner apical angles not prominent, situated in level with outer angles; sutural margin not or slightly raised, sutural striae fairly deep, bent at base, not extended along basal margins, parallel between level of scutellar tip to apices; adsutural areas narrow, flat, with dense, distinct puncture row, lateral striae punctate. Elytral disc with punctation fine, punctures larger than those on pronotum, mostly poorly delimited, with puncture intervals about twice to three times as puncture diameters, punctures near apices distinctly denser and coarser, fairly well delimited and only slightly smaller than puncture intervals. Hind wings fully developed. Hypomera and mesanepisterna smooth. Mesepimera about as three quarters of intervals to mesocoxae, about three times as long as wide. Metaventrite not microsculptured, very fine punctate, lacking impressions or stria; antecoxal puncture rows absent. Submesocoxal areas about 0.02 mm, about as sixth to seventh of intervals to metacoxae, submesocoxal lines parallel, finely punctate, punctures not extended by striae. Metanepisternum flat, hardly narrowed anteriad, inner margin straight, suture fairly deep. Tibiae straight. Abdomen not microsculptured and very finely and sparsely punctate; submetacoxal areas 0.04-0.05 mm, about as halves of intervals to apical margin of sternite, submetacoxal lines convex, distinctly punctate.

M a l e: Protarsomeres 1 to 3 slightly widened. Aedeagus ( Figs 65-68 ) 0.63-0.70 mm long, symmetrical. Median lobe with large, oval, fairly sclerotized basal bulb. Apical process very short, bent ventrally, with broad apical ostium. Articular process large, prominent ventrally. Parameres broad, sclerotized in basal section and at dorsal edges, with large membranous lobes very densely strigulate. Internal sac with large, elongate basal sclerites, elongate tuft of denticles and flattened flagellum extruded in repos.

E t y m o l o g y: The species epithet is a Latin adjective meaning linear.

Co mpar a tive note s: This species resembles in habitus members of the S. blefusca group, though it is larger and differs notably by the elytral punctation. Its aedeagal characters are, however, distinctive.

Figures

Figs 65 - 69: Aedeagi of Scaphisoma; (65 - 66), S. lineare nov. sp., in dorsal and lateral views; (67), ditto, paramere in ventral view; (68), internal sac and apex of median lobe in lateral view; (69), S. caudatoides nov. sp., aedeagus in dorsal view. Scale = 0.1 mm.