Baeocera baliensis, Lobl, 2015

Löbl, Ivan, 2015, On the Scaphidiinae (Coleoptera: Staphylinidae) of the Lesser Sunda Islands, Revue suisse de Zoologie 122 (1), pp. 75-120 : 77-79

Baeocera baliensis sp. nov.

Figs 6-8

Holotype: MHNG; ♂; Indonesia, Bali Lake Tamblingan ca 1300 m, 30.X.91 I. Löbl, forest floor litt.

Etymology: The species epithet is derived from the name of the island Bali.

Description: Length 1.55 mm, width 0.96 mm. Body convex, lacking obvious microsculpture. Head, body and femora dark reddish-brown, tibiae slightly, tarsi and antennae distinctly lighter than body. Length/width ratio of antennomeres as follows: III 30/7: IV 30/7: V 33/8: VI 25/6: VII 36/12: VIII 28/9: IX 35/14: X 32/15: XI 40/16. Lateral contours of pronotum and elytra continuously arcuate. Pronotum with punctation very fine, setation hardly visible (50x magnification), lateral margins convex, anterior margin broad, basal lobe poorly developed; lateral pronotal carinae concealed in dorsal view. Scutellum concealed. Elytra strongly narrowed apically, not covering abdominal apex, lateral margin carinae concealed in dorsal view, sutural striae curved at base to form basal striae joined to lateral striae; adsutural areas flat, parallel except in apical third, punctate. Elytra impunctate near base, with fairly coarse punctures on most surface, punctures becoming fine apically, puncture intervals mostly about as large to twice as large as puncture diameters. Epipleural striae reaching level of sternite 2, punctate, supraepipleural areas with puncture row. Hind wings well developed. Hypomera impressed, impunctate, smooth. Mesoventral suture distinct, mesoventrite impunctate, with median ridge. Mesepimera each about 3 times as long as wide and about 3 times as long as interval to metacoxae. Median part of metaventrite flattened, coarsely punctate except in middle part and near metacoxal process. Lateral parts of metaventrite coarsely punctate, except on smooth areas near metacoxae and metanapisterna. Punctures on lateral parts of metaventrite round, as large as or larger than puncture intervals. Submesocoxal lines arcuate, with marginal punctures not extended laterally, submesocoxal areas about 0.06 mm long, slightly longer than half of interval to metacoxae. Metanepisterna about 0.07 mm wide, parallel-sided, convex, with suture deep, broad, and coarsely punctate. Protibiae straight, mesotibiae and metatibiae slightly curved. Sternite 1 with basal punctures fairly coarse, elongate, interrupted in middle, lacking basal wrinkles, punctation fine but distinct on lateral parts of sternite, absent from median part.

Male: Protarsomeres not widened. Aedeagus ( Figs 6-8 ) 0.35 mm long, fairly sclerotized. Median lobe similar to that in B. badia and B. barda , articular process almost indistinct. Parameres long, slightly narrowed behind mid-length and almost straight in dorsal view, bent in basal third and slightly widened in apically lateral view. Internal sac with robust, straight sclerite, membranes striate laterally sclerite, denticulate structures absent.

Distribution: Indonesia: Bali.

Type locality: Bali, Lake Tamblingan, ca 1300 m.

Comments: This species is likely closely related with B. praesignis Löbl, 2002 and B. bironis (Pic, 1956) that possess similar aedeagi, in particular the internal sacs. These two species may be, however, readily distinguished from B. baliensis by the very finely punctate lateral parts of the metaventrite and by the comparatively shorter apical antennomeres.

Figures

Figs 1-8. (1-5) Baeocera badia sp. nov., aedeagus in dorsal (1) and lateral (2) views, parameres (3) in ventral view, gonocoxite (4), internal sac in dorsal view (5). (6-8) Baeocera baliensis sp. nov., aedeagus in dorsal (6) and ventral (7) views, internal sac in dorsal view (8); scale bars for aedeagi = 0.1 mm, for parameres, gonocoxite and internal sac = 0.05 mm.