Scaphisoma luzonicum PIC , 1926

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 : 1428-1429

5.2.19.15. Scaphisoma luzonicum PIC, 1926 ( Figs 214, 215 )

Scaphosoma luzonicum PIC, 1926 : 1. Lectotype 6, MNHN; type locality Luzon, Los Banos. Lectotype designation and redescription: LÖBL 1972: 107, figs 41-43 [" S. luconicum " on p. 107 is a typographical error].

A d d i t i o n a l m a t e r i a l e x a m i n e d: Luzon, Lagunas Prov. Mt. Makiling, 4 km SE Los Banos, 8-IV-1977, berlese forest litter, leg. L. Watrous 1 6, the same data but 9.IV.1977, 1♀ (MHNG); Luzon, Lagunas, Mt. Makiling, summit road, 600 m, 21-22.XI.1995, leg. I. Löbl, 1♀ (MHNG); Luzon, Lagunas, Mt. Banahaw above Kinabuhayan, Cristalino trail, 600-700 m, 24.XI.1995, leg. I. Löbl, 1♀ (MHNG).

Redescription: Length 1.60-1.65 mm, width 1.08-1.17 mm. Head, body, femora and tibiae ochreous. Elytra as thorax or slightly lighter, with or without darkened areas near apices. Tarsi and antennae almost yellowish. Length/width ratio of antennomeres as: III 10/6: IV 30/5: V 46/7: VI 38/6: VII 45/12: VIII 38/9: IX 45/12: X 40/12: XI 50/12. Pronotum very finely and fairly densely punctate; lateral contours evenly rounded, lateral margin carinae exposed in dorsal view, lateral striae punctate. Tip of scutellum exposed. Elytra with lateral margin carinae entirely distinct in dorsal view, apical margins truncate, inner apical angles not prominent, situated somewhat posterior level of outer angles; sutural margin not raised, sutural striae shallow, starting at base, impunctate, weakly converging from level of scutellum to apex; adsutural areas flat, densely and very finely punctate, lateral striae distinctly punctate. Discal punctation fine and fairly dense, puncture intervals smaller than puncture diameters. Hind wings fully developed. Hypomera and mesanepisterna not microsculptured, smooth. Mesepimera distinctly longer than intervals to mesocoxae, about four times as long as wide. Metaventrite with elongate, shallow mesal impression, middle area flattened, with strigulate microsculpture and finely and sparsely punctate; lateral areas lacking micros- culpture, very finely and sparsely punctate, punctures notably smaller than those on median area; antecoxal puncture rows absent. Submesocoxal areas 0.04 mm, about as third of intervals to metacoxae, submesocoxal lines convex, distinctly punctate. Meta- nepisternum flat, weakly narrowed anteriad, inner margin straight, rounded at angles, impressed below margin of metaventrite. Protibiae and mesotibiae straight, metatibiae slightly curved. Abdomen with strigulate microsculpture, very finely and sparsely punc- tate, punctures and along submetacoxal lines excepted; sternite 1 with submetacoxal areas about 0.05 to 0.07 mm, almost as or as halves of intervals to apical margin, submetacoxal lines convex, distinctly punctate.

M a l e: Protarsomeres 1 to 3 and mesotarsomeres 1 strongly widened, mesotarsomeres 2 slightly widened. Aedeagus ( Figs 214, 215 ) 0.86 mm long, symmetrical, strongly sclerotized. Basal bulb narrow, about as long as apical process of median lobe. Ventral branch of apical process weakly inflexed, gradually narrowed apically, with two subapi- cal denticles on dorsal side. Dorsal branches of apical process short and wide. Parameres sinuate and apically overlapping in dorsal view, widened posterior basal third in lateral view. Internal sac complex, with dense spinose and denticular structures in basal half, fairly strongly sclerotized, elongate rod-like mesal structure, two bunches of weakly sclerotized admesal teeth, four strongly sclerotized horn-like teeth and several smaller sclerites posterior mid-length, fine scale-like structures and narrow rods in apical section. D i s t r i b u t i o n: Philippines: Luzon.

Comments: The aedeagus of the holotype illustrated in LÖBL 1972: 96 has the internal sac extruded and is to part damaged. Therefore, new illustrations are given inn the present paper.

Figures

Figs 212 - 218: Aedeagi of Scaphisoma; (212, 213); S. jankodadai nov. sp., in dorsal and lateral views, scale 0.2 mm; (214), S. luzonicum PIC, in dorsal view, scale = 0.2 mm; (215), ditto, internal sac, scale = 0.1 mm; (216, 217), S. bilobum nov. sp., in dorsal and lateral views, scale 0.2 mm; (218), ditto, internal sac, scale = 0.1 mm.