Scaphisoma ablutum, Lobl, 2015

Löbl, Ivan, 2015, On the Scaphidiinae (Coleoptera: Staphylinidae) of the Lesser Sunda Islands, Revue suisse de Zoologie 122 (1), pp. 75-120 : 92-94

Scaphisoma ablutum sp. nov.

Figs 60-62

Holotype: MHNG; ♂; Indonesia, Indo: Lombok G. Rinjani 1950 m mossforest D. Agosti 16.3.1991 / Agosti F91558 Lombok G. Rinjani 8 16.3.91 [handwritten].

Paratypes: SMNS, MHNG; 2 ♀; Indonesia, Lombok Is. Sapit-Sembalun Bumbung 14.-16.Feb.1994 Bolm lgt., 900-1500 m. – SMNS; 1 ♀; Indonesia Lombok Serano N. Slope of Rinjani, 2.-5.Feb 1994 Bolm lgt. 1100 m.

Etymology: The species epithet is a Latin adjective, meaning washed and referring to a heavy rainfall in Lombok.

Description: Length 1.90 mm, width 1.23 mm. Head and most of body light brown, apical third of elytra yellowish. Appendages somewhat darker than apical part of elytra. Pronotum and elytra not microsculptured. Antennae long, length/width ratio of antennomeres as follows: III 16/9: IV 50/8: V 55/9: VI 55/9: VII 60/13: VIII 50/10: IX 56/15: X 55/15: XI 65/17. Antennomere III subtriangular. Pronotum finely punctate, punctures dense, well delimited, lateral margins evenly rounded, lateral margin carinae not visible in dorsal view. Point of scutellum exposed. Elytra with lateral margin carinae not visible in dorsal view, apical margins truncate, inner apical angle rounded, not prominent, situated posterior level of outer angles, sutural margin raised, sutural striae fairly deep, converging apically, not curved at base and not extending laterad pronotal lobe, adsutural areas flat. Elytral punctation fine and dense, punctures fairly well delimited, puncture intervals mostly about twice to three times as large as puncture diameters. Hypomera smooth. Mesepimeron about 1.5 times as interval to mesocoxa, about 4 times as long as wide. Metaventrite not microsculptured, flat in middle, with deep mesal groove and two shallow apicomedian impressions; punctation even, very fine and sparse. Submesocoxal areas 0.09 mm, almost as half of interval to metacoxa, submesocoxal lines convex, with fairly coarse marginal punctures. Metanepisternum flat, in level with metaventrite, not narrowed anteriad, with inner margin straight, rounded at angles. Tibiae straight. Abdomen very finely punctate, with striate microsculpture. Submetacoxal areas 0.04 mm, submetacoxal lines convex, with fine margin punctures.

Male: Tarsomere 1 of protarsi and mesotarsi conspicuously widened, wider that tibiae, with conspicuous tenent setae. Tarsomeres 2 of protarsi and mesotarsi distinctly widened, tarsomeres 3 slightly widened. Aedeagus (Figs 60-62) 0.70 mm long, asymmetrical. Median lobe with basal bulb weakly sclerotized, robust and prominent articular process excepted. Apical process strongly inflexed, almost tubular, hardly narrowed apically in dorsal view. Parameres fairly wide near bases, not lobed, bent and narrowed in apical halves in dorsal view, sinuate and slightly narrowed apically in lateral view. Internal sac with curved flagellum and membranes bearing spinelike structures.

Distribution: Indonesia: Lombok.

Type locality: Lombok, G. Rinjani 1950 m.

Comments: The median lobe with robust articular process, the asymmetrical apical process, and the presence of a flagellum suggest relationships with members of the S. unicolor group, though the spine-like structures of the internal sac are absent in membersof that group. The short and robust median lobe in S. ablutum resembles that in the New Guinean S. fasciatum Pic, 1956 while the shape of the parameres is unique. See also comments under S. adjunctum .