Scaphisoma lineatopunctatum (Pic, 1916)

Löbl, Ivan, 2015, Notes on Scaphisoma of Kalimantan (Coleoptera: Staphylinidae: Scaphidiinae), Acta Entomologica Musei Nationalis Pragae 55 (1), pp. 129-144 : 132-134

Scaphisoma lineatopunctatum (Pic, 1916)

Pseudoscaphosoma lineatopunctatum Pic, 1916c: 7 .

Type locality. Indonesia, Kalimantan, Martapura .

Type material examined. LECTOTYPE (by present designation): ♀, ‘Martapura S.E. Borneo Doherty 1891 [printed] / type [handwritten by Pic] / TYPE [red, printed)] / Scaphosoma probabl [handwritten by Pic] / Pseudoscaphosoma lineatopunctatum Pic (handwritten by Pic / Lectotype Scaphisoma lineatopunctatum (Pic) des.Löbl, 2014’ ( MNHN).

Additional material examined. 2 ♀♀, ‘Borneo Is., Poling (sic) Hot Spring, Sabah Malaysia 30.IV.1980 M. & A. Sakai’ ( MHNG).

Redescription. Length 1.60 mm, width 1.15 mm. Head, pronotum and most of elytra very dark, almost blackish-brown, elytra each with not clearly delimited lighter subhumeral area, rather indistinct light subapical spot touching sutural stria and separated from narrowly light apices by dark area. Apical abdominal segments light brown to yellowish, femora reddish-brown, tibiae, tarsi and antennae yellowish. Antennae with length/width ratio of antennomeres as follows: III 18/8: IV 27/5: V 58/7: VI 45/8: VII 50/10: VIII 46/8: IX 54/10: X 55/11: XI 75/12. Pronotum with lateral margins rounded, lateral margin carinae visible in dorsal view, discal punctation very fine and sparse. Point of scutellum exposed. Elytra with lateral margin carinae entirely exposed in dorsal view, apical margins rounded, inner apical angle not prominent, situated posterior level of outer angles, sutural margin raised, sutural striae deep, not curved at base and not extended along basal margins, strongly converging from bases to apices, in particular posterior basal fourth; adsutural areas flat, slightly impressed, combined 0.32 mm wide at base, about 0.20 mm just posterior basal third, very narrow near apices, irregularly and finely punctate in anterior third, with single puncture row in apical section. Punctures along both sides of anterior section of sutural striae dense and coarse, well delimited, outer punctures margining basal third of sutural striae larger than puncture intervals. Remaining elytral punctation sparse and very fine, consisting mostly of not clearly delimited punctures; a few somewhat larger punctures present on anterior part of disc. Hypomera not microsculptured, very finely punctate. Mesepimeres about as long as interval to mesocoxae and 3 times as long as wide. Metaventrite with hardly visible strigulate microsculpture, convex in middle, with apicomedian part flattened and bearing fairly coarse puncture, lacking impressions; with very shallow median stria, punctation almost evanescent; antecoxal puncture lines present, impressed, coarsely punctured. Submesocoxal lines parallel, submesocoxal areas 0.04 mm long, as sixth of interval to metacoxae, distinctly punctate. Metanepisterna slightly convex, 0.12 mm wide, moderately narrowed anteriad, with inner suture almost straight, not impressed below level of metaventrite. Protibiae straight, mesotibiae and metatibiae curved. Abdomen with strigulate microsculpture. Ventrite 1 very finely and sparsely punctate, basomedian area lacking coarse punctures; submetacoxal lines subparallel, submetaxocal areas 0.04 mm long, hardly as fifth of interval to apical margin of ventrite.

Differential diagnosis. The relationships of the species are unknown in absence of male characters. The species is, however, quite well characterized by its metaventrite being striate in the middle and the elytra with strongly converging sutural striae, in combination with the body colour. The record from Sabah is new.

Distribution. Indonesia (Kalimantan) and Malaysia (Sabah).