Scaphisoma diversum, 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 : 1356-1357

5.2.3.1. Scaphisoma diversum nov.sp. ( Figs 53, 54 )

T y p e m a t e r i a l: Holotype 6: Luzon: Philippines Mt. Data (2300m) Mountain Prov. 26. VII. 1985 M. Sakai leg. (EUMJ). Paratypes: with the same data as the holotype, 1 6, 1♀ (EUMJ, MHNG).

D e s c r i p t i o n: Length 1.70-1.86 mm, width 1.24-1.32 mm. Head dark brown to blackish posterior eye level, becoming lighter anteriad, near clypeus as mouth-parts ochreous. Thorax uniformly black or pronotum black, ventral side very dark reddish. Elytra black, with apical fourth ochreous, as abdomen and appendages; light apical parts of elytra well delimited. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 14/9: IV 16/9: V 26/9: VI 46/11: VII 54/18: VIII 37/13: IX 54/18: X 52/18: XI 55/18. Pronotum very finely and sparsely punctate, punctures hardly visible at 50 times magnification; lateral margins evenly rounded, lateral margin carinae not visible in dorsal view, lateral striae punctate. Exposed tip of scutellum minute. Elytra not flattened, with lateral margin carinae not visible in dorsal view, apical margins slightly rounded, inner apical angles not prominent, situated posterior level of outer angles; sutural margin slightly raised, sutural striae shallow, curved along pronotal lobe, not extending along basal margin, parallel toward mid-length, converging in apical halves, impunctate; adsutural areas narrow, flat, each with single, very fine puncture row, lateral striae very finely punctate. Elytral disc with punctation hardly visible, punctures only slightly larger than those on pronotum. Hind wings fully developed. Hypomera and mesanepisterna smooth. Mesepimera about as two thirds of intervals to mesocoxae and almost four times as long as wide. Metaventrite not microsculptured, with hardly visible punctation. Median part of metaventrite convex, without impressions or stria; antecoxal puncture rows absent. Submesocoxal areas 0.03 mm, about as ninth to eighth of intervals to metacoxae, submesocoxal lines convex, finely punctate, punctures not extended by striae. Metanepisternum flat, not impressed, parallel-sided, inner margin curved at anterior angles, suture shallow. Tibiae straight. Abdomen with punctulate microsculpture, very finely and sparsely punctate; submetacoxal areas 0.03- 0.05 mm, about as seventh to fourth of intervals to apical margin of sternite, submetacoxal lines convex, distinctly punctate.

M a l e: Protarsomeres 1 to 3 weakly widened. Aedeagus ( Figs 53, 54 ) 0.54-0.59 mm long, symmetrical, weakly sclerotized. Basal bulb very small. Apical process of median lobe narrow, elongate, weakly inflexed, with tip acute and bent. Parameres narrow, slightly extended beyond tip of median lobe, with membranous apical lobe. Internal sac with simple, almost straight flagellum.

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

Comparative notes: This species may be readily distinguished from its allied by the colour pattern of the elytra and the larger body-size. It may be separated from the Philippine congeners, in addition to its male genital characters, by the very finely punctate body in combination with the punctulate abdominal microsculpture, the comparatively large size of the body, the colour pattern, and the shape of the sutural striae of the elytra, in combination.

Figures

Figs 52 - 57: Scaphisoma; (52), antenna of S. subpunctulum nov. sp.; (53, 54), S. diversum nov. sp., aedeagus in dorsal and lateral views; (55, 56), S. blefusca nov. sp., aedeagus in dorsal and lateral views; (57), S. ilonggo nov. sp., aedeagus in dorsal view. Scale = 0.1 mm.