Scaphisoma tricolorinotum, 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 : 1436-1437

5.2.21.5. Scaphisoma tricolorinotum nov.sp. (Figs 40, 240, 241)

T y p e m a t e r i a l: Holotype 6: Philippines Baracatan, 1500 m Mindanao June, 27-29, 1977 M. Satô leg (MHNG). Paratypes: Mindanao, with the same data as the holotype, 7 66 (MHNG); Mainit Hot Springs, 28.VII.1970, leg. M. Satô, 2 66 (MHNG); Mindanao, Bukidnon Prov., 5 km N. of Malaybalay, 900 m, 12.V.1996, leg. Bolm, 1 66 (SMNS); Mindanao, 30 km NW of Maramag, Bagongsilang, 1700 m, 13-17.V.1996, leg. Bolm, 7 66 (SMNS, MHNG); Mindanao, Davao Prov., E. slope Mt. McKinley, 22.VIII.1946, 5400 ft., Lot 10 polypore 1, leg. F.G. Werner, 10 66 (FMNH, MHNG, BZLA); Mindanao, Davao Prov., Meran, E. slope of Mt. Apo, 6000 ft., 5.XI.1946, on decaying fleshy, gilled bracked fungus, original forest, leg. F.G. Werner, 2 66 (FMNH); Mindanao, Cotabato Prov., Burungkot, Upi, 1500 ft., 1-6.I.1947, leg. F.G. Werner, 3 66 (FMNH, MHNG); Mindanao, Cotabato Prov., 50 km N. of Parang, 500 ft., 6.XII.1946, on encrusting polypore, leg. F.G. Werner, 3 66 (FMNH); Dinagat, Dinagat, 17.XII.1915, leg. G. Böttcher, 1 6 (ZMUB); Luzon, Ifugao Prov., Mt. Polis 1900 m, 4-5.VI.1977, leg. M. Satô, 1 6 (MHNG). D e s c r i p t i o n: Length 2.05-2.50 mm, width 1.48-1.70 mm. Most external characters as in S. tricoloratum and S. tridens. Darkened mesal area of pronotum reaching mid-third of pronotal length or extended up to anterior pronotal margin, and usually narrowed anteriad. Apical yellowish area of elytra as fifth to fourth of elytral length. Length/width ratio of antennomeres as: III 15/7: IV 50/8: V 85/6: VI 74/8: VII 78/11: VIII 63/8: IX 80/11: X 73/13: XI 92/13. Punctation on pronotal lobe fairly distinct. Elytral punctation less dense, with puncture interval mostly twice to three times as large as puncture diameters. Intercoxal process of sternite 1 with several fairly distinct punctures, remaining abdominal punctation, that along submetacoxal lines excepted, extremely fine, barely visible at 100 times magnification.

M a l e: Mesotarsomere 1 wider than apex of mesotibiae. Sternite 6 flat. Aedeagus ( Figs 240, 241 ) 1.30-1.55 mm long. Apical process of median lobe with ventral branch elongate, inflexed, strongly narrowed apically, sinuate in dorsal view, with acute tip. Dorsal branch of median lobe short, not reaching up to mid-length of ventral branch. Internal sac with proximal, V-shaped sclerites, long rod joined to sclerotized structures, shorter tooth-like rod widened proximally, small, finely denticulate mesal vesicle, and very dense rows of apical spine-like structures.

E t y m o l o g y: The species epithet is a Latin adjective referring to the tricoloured pronotum.

C o m p a r a t i v e n o t e s: The pronotal colour pattern is a reliable species character only in fully coloured specimens. The shape of the apical process of the median lobe is diagnostic. The locality data of the single specimen labelled as from Luzon appear suspect, in absence of other specimens found north of Dinagat and Mindanao.

Figures

Figs 238 - 241: Aedeagi of Scaphisoma in dorsal and lateral views; (238, 239), S. tricoloratum nov. sp., in lateral view, without right paramere; (240, 241), S. tricolorinotum nov. sp. Scale = 0.3 mm.