Scaphisoma inconventum, 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 : 1391-1392

5.2.13.6. Scaphisoma inconventum nov.sp. ( Figs 125, 126 )

T y p e m a t e r i a l: Holotype 6: Philippines: Luzon Mount Data n. Lodge 8.I.80 Deharveng-Orousset 156 (MHNG). Paratypes: Luzon, Mountain Prov., env. Sagada nr. Ambasing, 15-19.XII.79, leg. L. Deharveng & J. Orousset 41, 1♀ (MHNG); Luzon, Mountain Prov., env. Sagada Ambasing, 1460 m, 16.XII.79, leg. L. Deharveng & J. Orousset 27, 1♀ (MHNG); Luzon, Mountain Prov., Mt. Puguis, 2000 m, 19.VII.1985, leg. M. Sakai, 1 6 (MHNG); Luzon, Benguet Prov., Sayangan, 2300 m, 10.VII.1985, leg. M. Sakai, 1 6 (EUMJ); with the same data but 12.VII.1985, 1♀ (EUMJ); Luzon, Benguet Prov., nr. Sayangan, Paoay 2400 m, 11.VII.1985, leg. M. Sakai, 1 6, 1♀ (EUMJ, MHNG).

D e s c r i p t i o n: Length 1.33-1.42 mm, width 0.93-0.98 mm. Head and most of body brown to blackish-brown, mesoventrite and metaventrite darkened in lighter specimens, appendages lighter than body, ochreous. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 10/7: IV 27/6: V 25/7: VI 27/8: VII 35/9: VIII 27/8: IX 35/10: X 32/10: XI 37/12. Pronotum with punctation very fine, lateral margins evenly rounded, lateral margin carinae not or hardly visible in dorsal view, lateral striae very finely punctate. Exposed tip of scutellum minute. Elytra convex, with lateral margin carinae usually exposed in dorsal view, apical margins rounded, inner apical angles not prominent, situated posterior level of outer angles; sutural margin not raised, sutural striae fairly deep, shortly bent at base, not extended along basal margins, parallel posteriad, very finely punctate; adsutural areas narrow, flat, each with single puncture row, lateral striae impunctate. Elytral disc with punctation fine and sparse, well visible, punctures usually somewhat larger than those on pronotum. Hind wings fully developed. Hypomera and mesanepisterna smooth. Mesepimera fused. Metaventrite not microsculptured, with barely visible punctate. Median part of metaventrite convex, without two deep apicomedian impressions; antecoxal puncture rows absent. Submesocoxal areas 0.05 mm, about as half of intervals to metacoxae, submesocoxal lines convex, coarsely punctate, punctures not extended by striae. Metanepisternum flat, narrowed anteriad, inner margin oblique. Tibiae straight. Abdomen lacking microsculpture, very finely punctate, sternite 1 with submetacoxal areas 0.04 mm, about as third of intervals to apical margin of sternite, submetacoxal lines convex, coarsely punctate.

M a l e: Protarsomeres 1 to 3 slightly widened. Aedeagus ( Figs 125, 126 ) 0.31 mm long, symmetrical, weakly sclerotized. Median lobe with comparatively large basal bulb and robust articular process, apical process moderately curved, gradually narrowed in dorsal view, with acute tip. Parameres strongly widened basally, narrow in apical halves, with membranous inner margins. Proximal part of flagellum widened.

E t y m o l o g y: The species epithet is Latin adjective, meaning not joint.

C o m p a r a t i v e n o t e s: This species is quite similar to S. palawanum PIC. It may be readily distinguished from the latter and other allied species by the fused mesepimera. In addition, the shape of its median lobe and of the parameres is diagnostic.

Figures

Figs 126 - 130: Aedeagi of Scaphisoma; (126), S. inconventum nov. sp., in lateral view; (127, 128), S. inopportunum nov. sp., in dorsal and lateral views; (129, 130) S. oviforme nov. sp., in dorsal and lateral views. Scale = 0.1 mm.