Scaphisoma punctatipenne Pic, 1916

Löbl, Ivan, 2015, Notes on Scaphisoma of Kalimantan (Coleoptera: Staphylinidae: Scaphidiinae), Acta Entomologica Musei Nationalis Pragae 55 (1), pp. 129-144 : 136-137

Scaphisoma punctatipenne Pic, 1916 , stat. nov.

Scaphosoma oblogum var. punctatipenne Pic, 1916a: 4 .

Type locality. Scaphosoma oblogum : ‘Ile Nias’, S. oblogum var. punctatipenne : ‘Bornéo’.

Type material examined. Scaphosoma oblogum : LECTOTYPE (by present designation): ♀, ‘ Lahago Centraal Nias 4II-10III 1896 I.Z.Kannegieter [printed] / type [handwritten by Pic] / TYPE [red, printed] / Scaphosoma oblongum Pic [handwritten by Pic] / Lectotype Scaphisoma oblongum Pic des. Löbl, 2014’ ( MNHN). Scaphosoma oblogum var. punctatipenne : LECTOTYPE (by present designation): ♀, ‘ Martapura S. E. Borneo Doherty 1891 [printed] / type [handwritten by Pic] / TYPE [red, printed] / Sc oblongum punctatipenne Pic [handwritten by Pic] / Lectotype Scaphisoma punctatipenne Pic des. Löbl, 2014’ ( MNHN).

Redescription. Length 1.45 mm, width 0.95 mm. Head and body very dark reddish-brown, apical elytral margins lighter. Apical abdominal segments and appendages light, yellowish. Pronotum and elytra without microsculpture. Antennae with length/width ratio of antennomeres as follows: III 9/7: IV 14/6: V 38/5: VI 50/6: VII 51/10: VIII 45/8: IX 53/11 (right antenna, with segment X and XI broken, left antenna missing). Pronotum with lateral margins rounded, lateral margin carinae not visible in dorsal view, discal punctation very fine, punctures dense, not well delimited, pubescence indistinct. Point of scutellum exposed. Elytra with lateral margin carinae exposed in dorsal view, apical margins slightly rounded, inner apical angle not prominent, situated posterior level of outer angles, sutural margin not raised, sutural striae fairly deep, curved at base, not extended along basal margins, parallel between level of scutellum and mid-length, slightly converging from mid-length apically, adsutural areas flat, with single fine puncture row, at mid-length combined about 0.09 mm wide, shortly posterior scutellum combined about 0.11 mm wide. Punctation on small humeral area very fine, on most of basal halves of elytral disc coarse and conspicuously dense, punctures well delimited, to large part about twice as large as puncture intervals. Punctation posterior elytral mid-length becoming gradually finer and sparser. Hypomera not microsculptured, very finely punctate. Mesepimeres as long as interval to mesocoxae and 4 times as long as wide. Metaventrite weakly convex between mesocoxae, flattened apicomesally, lacking impressions or grooves, very finely and sparsely punctured laterally, fairly coarsely and very densely punctured on median part, with punctures to part as large as puncture intervals, lateral parts of metaventrite lacking microsculpture, median part with strigulate microsculpture. Submesocoxal lines weakly convex, distinctly punctured, submesocoxal areas 0.05 mm long, as third of interval to metacoxae. Metanepisterna flat, in level with metaventrite, 0.09 mm wide, weakly narrowed anteriad, inner suture straight, rounded at angles. Protibiae and mesotibiae straight, metatibiae somewhat curved. Abdomen with strigulate microsculpture. Ventrite 1 very finely and sparsely punctured laterally, with dense and fairly coarse punctures on basal half of median area, similar to those on median part of metaventrite; submetaxocal lines convex, submetaxocal areas 0.07 mm long, about as half of interval to apical margin of ventrite.

Comments. This species was described as a variety of S. oblongum Pic, 1916 . According to the ICZN Art. 45.6.4, the name S. punctatipenne Pic, 1916 is available and the taxon is to be dealt with as a subspecies of S. oblongum Pic, 1916 . The latter species was described from Nias, and since its description never again reported. Both, S. oblongum and S. punctatipenne possess similar pronota and elytra, and in particular a quite striking pattern of elytral punctation, though S. oblongum is less darkly colored. These species may be distinguished by characters of the ventral side of the body. Scaphisoma oblongum has the mesepimera much longer, about 5 times as long as the interval to the mesocoxae; the metaventrite convex in the middle, with two very shallow apicomedian impressions, the strigulate microsculpture distinct also on the lateral parts of the metaventrite, but not near the metanepisterna, the metasternal punctation is generally fine all over though consisting of larger punctures between metacoxae, the antemetacoxal puncture rows present; the submesocoxal lines parallel, the submesocoxal areas narrower, 0.03 mm long, a sixth of the interval to the metacoxae; the metanepisterna impressed below level of the metaventrite and slightly convex, the median part of the ventrite 1 very finely punctate, the submetacoxal areas shorter, about a third of the interval to the apical margin of the ventrite.

Distribution. Indonesia (Kalimantan).