Scaphisoma bicolor, 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 : 1444

5.2.22.1. Scaphisoma bicolor nov.sp. ( Figs 3 , 257 )

T y p e m a t e r i a l: Holotype ♀: Meran, E. slope Mt. Apo, Davao Province, Mindanao 6000 ft; XI: 5: 46 / On decayed fleshy, gilled bracket fungus / original forest / CNHM-Philippine Zool. Exped. (1946-47) F.G. Werner leg. (FMNH). Paratypes: Mindanao, Davao Prov., E. slope of Mt. McKinley, 6800 ft., 25.VIII.1946, lot 26, beating, 1♀ leg. F.G. Werner (MHNG); Mindanao, Todaya, 30.VII.1970, 1♀ leg. M. Satô (MHNG).

Description: Length 1.98-2.06 mm, width 1.37-1.45 mm. Head, pronotum, anterior halves of elytra, mesoventrite and metaventrite with anepisterna and epimeres black, hypomera dark reddish-brown to blackish. Elytra with apical halves yellowish, border between black and yellowish areas fairly abruptly delimited, oblique, black area extended posterior elytral mid-length along suture, not reaching mid-length along lateral margins. Abdomen brown to ochreous, with yellowish apical segments. Legs ochreous. Antennae with yellowish segments II to VI, somewhat darken from segment VII on. Pronotum and elytra not microsculptured and not iridescent. Length/width ratios of antennomeres as: III 17/12: IV 24/11: V 30/10: VI 56/9: VII 60/19: VIII 36/12: IX 55/20: X 53/20: XI 65/22 ( Fig. 257 ). Pronotum very finely and densely punctate, with lateral contours evenly rounded, lateral margin carinae visible in dorsal view, lateral striae impunctate. Exposed tip of scutellum minute. Elytra with lateral margin carinae entirely visible 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, bent at base along margin of pronotal lobe, not extending laterad pronotal lobe, parallel between level of scutellar tip and apex, very finely punctate; adsutural areas flat, very finely punctate, lateral striae impunctate. Elytral disc with punctation fine and fairly dense, punctures not well delimited yet clearly larger than pronotal punctures; puncture intervals mostly about twice to four times as large as puncture diameters. Hind wings fully developed. Hypomera and mesanepisterna smooth. Mesepimera shorter than intervals to mesocoxae, about four times as long as wide. Metaventrite not microsculptured, convex in middle, lacking mesal or apicomesal impressions or striae, with punctation very fine and sparse; antecoxal puncture rows absent. Submesocoxal 0.06 mm, about as fifth of intervals to metacoxae, submesocoxal lines convex, impunctate. Metanepisternum flat, narrowed anteriad, inner suture deep, almost straight except at distinctly rounded angles. Tibiae straight. Abdomen with sternite 1 lacking microsculpture and very finely punctate, submetacoxal areas 0.05 mm, about as fourth of intervals to apical margin of sternite 1, submetacoxal lines convex, distinctly punctate. Sternites II to IV and exposed tergites with hardly visible punctulate microsculpture, sternite V with strigulate microsculpture.

E t y m o l o g y: The species epithet is Latin and refers to the bicolorous elytra.

Comparative notes: This species has unique, conspicuous colour pattern and may be easily distinguished from its Asian and Australian congeners.

Figures

Figs 1 - 6: Habitus of Scaphisoma; S. anomalum LÖBL (1); S. bibiranense LÖBL (2); S. bicolor nov. sp. (3); S. bicoloripenne nov. sp. (4); S. bicuspidatum nov. sp. (5); S. binaluanum PIC (6). Scale: 1.0 mm.

Figs 256 - 258: Scaphisoma; (256), S. trimaculatum nov. sp., aedeagus in lateral view, scale = 0.3 mm; (257), S. bicolor nov. sp., antennomeres II-XI, scale = 0.1 mm; (258), S. lienhardi nov. sp., antennomeres III-XI, scale = 0.1 mm.