Baeocera bona, Lobl, 2015

Löbl, Ivan, 2015, On the Scaphidiinae (Coleoptera: Staphylinidae) of the Lesser Sunda Islands, Revue suisse de Zoologie 122 (1), pp. 75-120 : 89-91

Baeocera bona sp. nov.

Figs 46-50

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

Paratypes: MHNG; 3 ♂, 5 ♀; Indonesia, Lombok Mt. Rinjani , ca 400 m nr. Waterfalls 5.XI.91 Löbl leg. debris nr. river. – MHNG; 2 ex.; Lombok, Mt. Rinjani above Senaro, 900-1100 m 6.XI.1991, I. Löbl forest floor litter. – MHNG; 1 ♀; Lombok Pusuk Pass 300 m 3.XI.1991 I. Löbl degr. forest leaf litter. – MHNG; 3 ♂, 1 ♀, 9 ex.; Lombok Batu Koq (N of G. Rinjani) 500 m sec. forest in gorge D. Agosti 12.03.1991. – MHNG; 5 ex.; Lombok, Gn. Rinjani 1000 m (Winkler) D. Agosti F91562 . – SMNS; 1 ex.; Lombok Is. Senaro N slope of Rinjani, 2.-5.Feb. 1994 Bolm lgt. 1100 m.

Etymology: The species epithet is a Latin adjective meaning good.

Description: Length 0.98-1.13 mm, width 0.65-

0.73 mm. Body rather strongly convex, lacking obvious microsculpture. Head and body reddish-brown, appendages and apex of abdomen somewhat lighter than body. Length/width ratio of antennomeres as follows: III 22/5: IV 21/5: V 29/5: VI 27/6: VII 32/7: VIII 24/7: IX 33/10: X 31/11: XI 35/13. Lateral contours of pronotum and elytra separately arcuate. Pronotum with very fine punctation and setation usually distinct (50x magnification), lateral margins convex, anterior margin broad, basal lobe small; lateral pronotal carinae concealed in dorsal view. Scutellum concealed. Elytra weakly narrowed apically, usually covering abdominal apex, lateral margin carinae concealed or hardly visible near base in dorsal view, sutural striae shortened, starting posterior level on pronotal lobe; adsutural areas flat, parallel, punctate. Elytra with impunctate narrow lateroapical areas; elytral punctation coarse and dense, including along basal margins, puncture diameters on basal half about half as large to as large puncture intervals, becoming smaller apically. Epipleural striae entire, punctate, supraepipleural areas impunctate. Hind wings well developed. Hypomera impunctate, smooth. Mesoventral suture indistinct, mesoventrite distinctly punctate, median ridge absent. Mesepimera fairly large, each almost 3 times as long as wide and about 3 times as long as interval to metacoxae. Median part of metaventrite slightly convex, with almost smooth centre delimited by coarse punctures. Lateral parts of metaventrite coarsely punctate, including near metacoxae. Punctation on metaventrite well delimited, consisting of punctures round, mostly larger than puncture intervals. Submesocoxal lines arcuate, with marginal punctures not extending laterally, submesocoxal areas about 0.02 mm long, as fourth of interval to metacoxae. Metanepisternal suture indicated by outer puncture row. Tibiae straight. Sternite 1 without basal wrinkles, basal punctures often elongate, forming row uninterrupted in middle, punctation near basal puncture row coarse, becoming very fine apically.

Male: Protarsomeres hardly widened. Aedeagus (Figs 46-49) 0.25-0.30 mm long. Median lobe symmetrical, with basal bulb longer than apical process. Apical process weakly inflexed, tapering, near tip very narrow and with concave ventral side (lateral view). Articular process small. Parameres long, extending beyond tip of median lobe, almost evenly broad, weakly curved in dorsal view, straight posterior basal third in lateral view. Internal sac with flagellum gradually narrowed, flagellar guidesclerite weakly sclerotized, lacking accessory sclerite, membranous scale-like structures usually hardly visible. Female: Ovipositor (Fig. 50) with long distal gonocoxite strongly narrowed apically, in apical section parallelsided, 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. It may be readily distinguished from its Indonesian congeners, B. kaibesara Löbl from the Molucca Island Kai Besar excepted, by the shortened sutural striae of elytra. It shares with the latter species the shape of the median lobe and the parameres, differs however by the elytral punctation, coarser punctation on the ventrite 1, and by the shape of the sclerotized pieces of the internal sac.