Baeocera darwini, Löbl, 2018

Löbl, Ivan, 2018, Review of the genus Baeocera of Chile (Coleoptera: Staphylinidae: Scaphidiinae), Linzer biologische Beiträge 50 (2), pp. 1305-1317 : 1307-1308

3.5 Baeocera darwini nov.sp. ( Figs 4-6 )

Baeocera species A in LÖBL 1983: 167.

T y p e m a t e r i a l: Holotype: ♂, CHILE: Isla Chiloé Vilapulli 18.2.83, T. Cekalovic [TC 129] ( MHNG) . Paratypes: 3♂♂, 2♀♀, with the same data as the holotype ; 1♂, CHILE: Aisen Cisne Maedio , 8.II.83 T. Cekalovic ; 1♂, CHILE: Cautin, 10 km S Pucon, Vol. Villarrica N. P. 15.XII.84 - 10.II.85 S&JPeck, FIT, 900m Nothofagus grove on ash ; 1♀, CHILE: Cautin, 15 km NE Villarrica, Flordel Lago , 14.XII.84 - 10.II.85 S&JPeck, 300 m, 2 FITS Nothofagus forest (all MHNG) ; 1♀, Chiloé I., Chile C. Darwin / Darwin Coll. 1885-119 / Chiloe 2371 / Baeocera species A det. Löbl 1982 ( NHML) .

D e s c r i p t i o n: Length 1.43-1.60 mm, width 0.92-1.0 mm. Body dark reddishbrown to black, apices of elytra and abdomen lighter. Femora dark brown or ochraceous, tibiae, tarsi and antennae lighter, light brown to yellowish. Eye width nearly as half of shortest interval between eyes. Length/width ratios of antennomeres as: III 23/6: IV 21/6: V 23/6: VI 18/7: VII 22/9: VIII 19/10: IX 30/15: X 30/16: XI 46/20. Dorsal and ventral sides of body not microsculptured. Pronotal punctation very fine, hardly visible at 80 times magnification. Tip of scutellum hardly visible. Elytra widest posterior basal sixth, weakly narrowed from widest point toward apices with lateral margins somewhat sinuate; sutural striae not shortened, starting at elytral base, extended laterad from basal pronotal lobe to form basal striae, extended to sides and joined with lateral striae, adsutural areas flat. Elytral punctation about as fine as pronotal punctation, with scattered distinctly larger punctures. Mesepimera about three times as long as wide and three times as long as intervals between them and mesocoxae. Metaventrite convex in middle part, lacking impressions, very finely punctate patches of distinct admesal punctures excepted; punctation on lateral parts of metaventrite about as fine as on pronotum. Submesocoxal areas about 0.08 mm long, as long as two thirds of shortest intervals between them and metacoxae; submesocoxal lines convex with somewhat concave outer section, distinctly punctate. Metanepisterna flat, with deep, slightly curved suture, in middle about 0.05 mm wide. Tibiae straight, slightly thickened apically.

Male characters: Protarsomeres I-III hardly widened. Aedeagus as Figs 4-6 , 0.45- 0.50 mm long.

E t y m o l o g y: The species is named after Charles Darwin who has found this species in Chiloé.

C o m m e n t s: This species may be easily distinguished from all other Chilean congeners by the elytra with complete basal striae joined to lateral striae. The large submesocoxal areas are also diagnostic. The aedeagal characters suggest relationships to B. chilensis REITTER and B. germaini PIC , though the parameres are significantly narrower than in B. chilensis and shorter than in B. germaini .

Figures

Figs 1-7: Aedeagi of Baeocera, in dorsal view; (1) B. danieli nov.sp., scale = 0.1 mm; (2) ditto, paramere, scale = 0.1 mm; (3) ditto, apical process of median lobe with extruded internal sac, scale = 0.05 mm; (4) B. darwini nov.sp., scale 0.1 mm; (5) ditto, parameres, scale = 0.1 mm; (6) ditto, internal sac, scale = 0.1 mm; (7) B. jarmilae nov.sp., in dorsal view, scale = 0.1 mm.