Baeocera batukoqensis, Lobl, 2015

Löbl, Ivan, 2015, On the Scaphidiinae (Coleoptera: Staphylinidae) of the Lesser Sunda Islands, Revue suisse de Zoologie 122 (1), pp. 75-120 : 81-83

Baeocera batukoqensis sp. nov.

Figs 20-24

Holotype: MHNG; ♂; Indonesia, Lombok Batu Koq (N of G. Rinjani) 500 m sec. forest in gorge D. Agosti 12.03.1991.

Paratypes: MHNG; 4 ♀; with the same data as the holotype. – MHNG; 1 ♂; Lombok Gn. Rinjani 1000 m (winkler) D. Agosti F91562 .

Etymology: The species epithet is derived from the name of the type locality.

Description: Length 1.14-1.20 mm, width 0.67- 0.72 mm. Body strongly convex, without obvious microsculpture. Head and body reddish-brown to blackish-brown, hypomera, abdomen and appendages lighter than most of body. Length/width ratio of antennomeres as follows: III 27/6: IV 25/6: V 32/6: VI 33/6: VII 40/8: VIII 32/8: IX 38/10: X 35/12: XI 35/15. Lateral contours of pronotum and elytra almost continuously arcuate. Pronotum with hardly visible punctation and setation (50x magnification), lateral margins convex, anterior margin broad, basal lobe small; lateral pronotal carinae concealed in dorsal view. Tip of scutellum hardly visible. Elytra moderately narrowed apically, not covering abdominal apex, lateral margin carinae concealed or hardly visible near base in dorsal view, sutural striae shallow, not shortened, curved at bases to form basal striae extending laterally and joined to lateral striae; adsutural areas somewhat raised in middle, parallel, impunctate. Discal punctation fairly coarse and dense from bases to mid-length or to apical third, with punctures well delimited, puncture intervals about as large to twice as large as puncture diameters; apical third to half of elytra finely but distinctly punctate. Epipleural striae entire, punctate, supraepipleural areas each with puncture row. Hind wings well developed. Hypomera impunctate, smooth. Mesoventral suture visible, mesoventrite finely punctate, lacking median ridge. Mesepimera about 2.5 times as long as wide and about twice as long as interval to metacoxae. Metaventrite coarsely punctate, punctures on lateral parts larger than on centre, to part larger than puncture intervals, only small central area and surfaces along metacoxae impunctate. Median part of metaventrite flattened. Submesocoxal lines arcuate, with marginal punctures not extending laterally, submesocoxal areas about 0.03 mm long, as third of interval to metacoxae. Metanepisterna fused to metaventrite, suture indicated by impressed outer row of coarse punctures. Tibiae straight. Sternite 1 with basal puncture row uninterrupted in middle, basal punctures elongate and up to 0.03 mm long laterally, punctation very fine, hardly visible posterior basal puncture row.

Male: Protarsomeres 1 to 3 widened. Aedeagus (Figs 20-23) 0.42-0.44 mm long, fairly sclerotized. Median lobe symmetrical, with basal bulb large, longer than apical process, latter appearing short and wide in dorsal view, tapering, weakly curved, with tip bent and acute and ventral side oblique in lateral view. Articular process small. Parameres almost straight and posterior base evenly wide in dorsal view, slightly sinuate and evenly wide in lateral view. Internal sac with robust complex of sclerites, flagellum comparatively short, flagellar guide-sclerite narrow, small accessory rod joined to striate membranous structures.

Female: Ovipositor (Fig. 24) with long, gradually narrowed distal gonocoxite bearing long apical seta, gonostyle absent.

Distribution: Indonesia: Lombok.

Type locality: Lombok, Batu Koq N of G. Rinjani, 500 m.

Comments: This species is a member of the B. lenta group with aedeagal characters similar to those in B. papua (Löbl, 1975) from New Guinea, although the parameres are sinuate in the new species (lateral view). Baeocera batukoqensis may be easily distinguished from B. papua by the abdominal ventrite 1 lacking distinct basal wrinkles.