Baeocera breviuscula, Lobl, 2015

Löbl, Ivan, 2015, On the Scaphidiinae (Coleoptera: Staphylinidae) of the Lesser Sunda Islands, Revue suisse de Zoologie 122 (1), pp. 75-120 : 91-92

Baeocera breviuscula sp. nov.

Figs 55-59

Holotype: MHNG; ♂; Indonesia, Bali Badingkayu , 300-500 m 10.-14.XI.1991, I. Löbl forest floor litter, bark.

Paratypes: MHNG; 5 ♂, 7 ♀; with the same data as the holotype. – MHNG; 1 ♂; Lombok Mt. Rinjani , ca 400 m nr. Waterfalls, 5.XI.91 Löbl veg.debris nr.river.

Etymology: The species epithet is Latin adjective meaning short and referring to the comparatively short parameres.

Description: Length 0.95-1.07 mm, width 0.61- 0.77 mm. Body strongly convex, without obvious microsculpture. Head, body and femora light reddish-brown, tibiae slightly lighter, tarsi and antennae yellowish. Length/width ratio of antennomeres as follows: III 18/6: IV 17/5: V 25/5: VI 23/5: VII 28/8: VIII 23/6: IX 30/10: X 30/13: XI 33/13. Lateral contours of pronotum and elytra separately arcuate. Pronotum with hardly visible punctation and setation (100x magnification), lateral margins convex, anterior margin broad, basal lobe small; lateral pronotal carinae concealed in dorsal view. Scutellum concealed. Elytra weakly narrowed apically, not covering abdominal apex, lateral margin carinae hardly visible in dorsal view, sutural striae curved at bases to form basal striae abruptly ending about at mid-width of elytra; adsutural areas flat, parallel in anterior two thirds, impunctate. Elytral punctation fairly coarse on most of anterior two thirds of disc, evanescent on small humeral area and becoming very shallow and fine from middle third toward apex; coarse punctures well delimited, mostly about half as large as puncture intervals. Epipleural striae entire, punctate, supraepipleural areas impunctate. Hind wings well developed. Hypomera impunctate, smooth. Mesoventral suture indistinct, mesoventrite distinctly punctate, without median ridge. Mesepimera large, about 3 times as long as wide and 3 times as long as interval to metacoxae. Median part of metaventrite flat, all over coarsely punctured. Entire lateral parts of metaventrite coarsely punctate; punctures round or hardly elongate, notably smaller and denser near metacoxae than near mesepimera, puncture intervals usually smaller than puncture diameters. Submesocoxal lines parallel, with marginal punctures not extending laterally, submesocoxal areas about 0.02 mm long, about as fifth of interval to metacoxae. Metanepisternal suture indicated by impressed outer row of coarse punctures. Tibiae straight. Sternite 1 with basal punctures coarse, not or weakly elongate, up to about 0.02 mm long, not separated by wrinkles and uninterrupted in middle; punctation strongly reduced posterior basal row, usually consisting of few fine punctures.

Male: Protarsomeres hardly widened. Aedeagus (Figs 55-58) 0.28-0.32 mm long. Median lobe symmetrical, with basal bulb moderately longer than apical process. Apical process strongly process weakly inflexed, tapering, with most of ventral side almost oblique, tip bent and narrow (lateral view). Articular process fairly large. Parameres comparatively broad and short, moderately extending beyond tip of median lobe, almost evenly wide between basal third and apices in dorsal view, slightly widened apically in lateral view. Internal sac with flagellum narrow, arcuate, gradually narrowed, flagellar guide-sclerite weakly sclerotized, joined to basal complex of sclerites, membranous scale-like structures usually distinct.

Female: Ovipositor (Fig. 59) with long distal gonocoxite gradually narrowed apically, bearing long apical seta, gonostyle absent.

Distribution: Indonesia: Bali, Lombok.

Type locality: Bali, Badingkayu , 300-500 m.

Comments: This species is a member of the B. lenta group. In external characters it resembles B. bifurcilla from which it may be distinguished by the elytra distinctly punctured near pronotal lobe and on apical third, the median part of the metaventrite flat and entirely coarsely punctate, and the sternite 1 with basal punctures not or weakly elongate.