Scaphisoma adscitum, Lobl, 2015

Löbl, Ivan, 2015, On the Scaphidiinae (Coleoptera: Staphylinidae) of the Lesser Sunda Islands, Revue suisse de Zoologie 122 (1), pp. 75-120 : 97-98

Scaphisoma adscitum sp. nov.

Figs 70-71

Holotype: SMNS; ♂; Indonesia, Lombok Is. Senaro N slope of Rinjani 2.-5.Feb.1994 Bolm lgt. 1100 m.

Paratype: MHNG; ♂; with the same data as the holotype.

Etymology: The species epithet is a Latin adjective, meaning strange.

Description: Length 1.34-1.36 mm, width 0.90- 0.92 mm. Head and most of body reddish-brown, apical margins of elytra and appendages lighter than body. Pronotum and elytra not microsculptured. Antennae short, length/width ratio of antennomeres as follows: III 6/7: IV 28/4: V 28/5: VI 31/7: VII 37/12: VIII 34/9: IX 40/12: X 37/13: XI 50/13. Antennomere III short, subtriangular. Pronotum very finely punctate, punctures sparse, not well delimited, lateral margins evenly rounded, lateral margin carinae not visible in dorsal view. Point of scutellum exposed. Elytra with lateral margin carinae hardly visible in dorsal view, apical margins truncate, inner apical angle rounded, not prominent, situated posterior level of outer angles, sutural margin not raised, sutural striae shallow, parallel, curved at base, not extending laterad pronotal lobe, adsutural areas flat. Elytral punctation very fine and dense near bases, distinct on remaining surface, with punctures fairly well delimited, puncture intervals mostly about 1.5 to 2.5 times as large as puncture diameters. Hypomera smooth. Mesepimeron about as long as interval to mesocoxa, about 4 times as long as wide. Metaventrite not microsculptured, convex in middle, without impressions; punctation almost even, very fine and sparse. Submesocoxal areas 0.05 mm, about as two thirds of interval to metacoxa, submesocoxal lines convex, with fine marginal punctures. Metanepisterna flat, in level with metaventrite, narrowed anteriad, with inner margin straight, rounded at angles. Tibiae straight. Abdomen very finely punctate, with striate microsculpture becoming obsolete on lateral parts of sternite 1. Submetacoxal areas 0.06 mm, as long as half of interval to apical margin of sternite, submetacoxal lines strongly convex, with fine margin punctures.

Male: Tarsomeres 1 to 3 of protarsi slightly widened. Aedeagus (Figs 70-71) 0.29-0.31 mm long, symmetrical, fairly sclerotized. Median lobe with basal bulb narrow, about as long as apical process, articular process not prominent. Apical process inflexed, weakly narrowed apically and with blunt apex in dorsal view, tapering, apex acute, ventral side arcuate in lateral view. Parameres wide near base and almost evenly broad in apical two third in dorsal view, narrowed to apical third in lateral view, not lobed, hardly bent in dorsal view. Internal sac without flagellum or other sclerotized pieces, membranes bearing denticulate structures.

Distribution: Indonesia: Lombok.

Type locality: Lombok, Senaro N slope of Rinjani, 1100 m.

Comments: This species resembles S. antennarum described below but has much smaller submetacoxal areas. The aedeagal characters suggest relationship with S. lombokense Löbl, 1986 though the aedeagus is smaller, the median lobe has prominent articular process and the apical process is comparatively much shorter. Scaphisoma lombokense differs in external characters notably by the sutural striae of the elytra extended along bases to form basal striae, and the antennomere V much longer than IV.