Baeocera badia, 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

Baeocera badia sp. nov.

Figs 1-5

Holotype: MHNG; ♂; Indonesia, Timor Camplong, 250 m monsoon forest NE of village, leaf litt. D. Agosti, 30.3.1991.

Paratypes: MHNG; 4 ♂, 2 ♀, 8 ex.; with the same data as the holotype ( MHNG). – MHNG; 2 ♂, 5 ♀, 9 ex.; Timor NTT, Camping 25.3.91, leaf lit. D. Agosti F91598 [the latter site is NE von Cabang Luar Kota, 10°1’57.57”S 123°56’4.04”E].

Etymology: The species epithet is a Latin adjective meaning chestnut-brown.

Description: Length 1.45-1.50 mm, width 1.02- 1.20 mm. Body moderately convex, without obvious microsculpture. Head and body reddish-brown, appendages and apex of abdomen lighter than body, almost yellowish. Length/width ratio of antennomeres as follows: III 20/7: IV 24/7: V 30/7: VI 27/8: VII 34/9: VIII 28/8: IX 34/15: X 32/15: XI 43/17. Lateral contours of pronotum and elytra separately arcuate. Pronotum with punctation very fine, setation hardly visible (50x magnification), lateral margins convex, anterior margin broad, basal lobe well developed; lateral pronotal carinae concealed in dorsal view. Tip of scutellum exposed. Elytra weakly narrowed apically, not covering abdominal apex, lateral margin carinae concealed or hardly visible in dorsal view, sutural striae curved at base to form basal striae joined to lateral striae; adsutural areas flat near base, raised posteriad, parallel, punctate. Elytral impunctate or very finely punctate near base, with fairly coarse punctures on remaining surface, including apical areas, puncture intervals mostly 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 impunctate, smooth. Mesoventral suture distinct, mesoventrite distinctly punctate, with median ridge. Mesepimera large, each about 3 times as long as wide and about 3 times as long as interval to metacoxae. Median part of metaventrite flattened, with smooth centre delimited laterally and apically by coarse punctures row. Lateral parts of metaventrite coarsely punctate, except on smooth areas near metacoxae. Punctures on lateral parts of metaventrite to part elongate, some as large as or larger than puncture intervals. Submesocoxal lines arcuate, with marginal punctures not extended laterally, submesocoxal areas about 0.05 mm long, as third of interval to metacoxae. Metanepisterna about 0.06-0.07 mm wide, narrowed anteriad, with suture deep, broad, straight, coarsely punctate. Protibiae straight, mesotibiae and metatibiae slightly curved. Sternite 1 with coarse basal punctures uninterrupted in middle, separated by wrinkles about 0.02-0.08 mm long, remaining abdominal punctation distinct.

Male: Protarsomeres hardly widened. Aedeagus ( Figs 1-3, 5 ) 0.41-0.48 mm, fairly sclerotized. Median lobe symmetrical, with apical process shorter than basal bulb, weakly inflexed, gradually narrowed apically, with acute tip. Articular process distinct, not prominent. Parameres long, slightly narrowed from base to mid-length and somewhat bent in dorsal view, evenly narrow and straight in lateral view. Internal sac with curved, proximally widened sclerite and densely denticulate basal membranous lobe, membranes posterior sclerite extremely finely denticulate.

Female: Ovipositor ( Fig. 4 ) with long distal gonocoxite hardly narrowed apically, bearing two long apical setae, gonostyle present, with two short subapical setae and one long apical seta.

Distribution: Indonesia: Timor.

Type locality: Timor, Camplong, 250 m, monsoon forest NE of village.

Comments: This is a member of the B. serendibensis group and is in external characters similar to B. serendibensis ( Löbl, 1971) and B. sauteri Löbl, 1980 . The aedeagal features suggest close relationships with the Australian B. alternans (Löbl, 1977) , the New Guinean B. bironis (Pic, 1956) , B. insperata (Löbl, 1977) and B. prospecta Löbl, 2002 , and B. agostii Löbl, 2014 from the Moluccas. The new species may be distinguished from these species, B. agostii excepted, by the elytra having complete basal striae, joined to lateral striae, and all but B. prospecta by the distinctly punctate lateral parts of the metasternum. The shape of the sclerite of the internal sac and the absence of long, striate or hairlike structures in the proximal part of the internal sac are diagnostic for B. badia .

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.