Baeocera variicolorata, Löbl, 2018

Löbl, Ivan, 2018, Review of the genus Baeocera of Chile (Coleoptera: Staphylinidae: Scaphidiinae), Linzer biologische Beiträge 50 (2), pp. 1305-1317 : 1311

3.11 Baeocera variicolorata nov.sp. ( Figs 13-16 )

T y p e m a t e r i a l: Holotype ♂, CHILE: Malleco 40 km W Curcautin 12.XII.84 - 16.II.85, FIT S&JPeck, malaise, 1500 m Nothofagus-Araucaria ( MHNG) . Paratypes: 2♂♂, 2♀♀, with the same data as the holotype ; 4♂♂, 4♀♀, CHILE: Cautin , 15 km NE Villarrica, Flordel Lago 14.XII.84 - 10.II.85 S&JPeck, 300 m, 2FITS Nothofagus forest ; 1♂, 1♀, CHILE: Cautin , 10 km S Pucon, Vol. Villarrica N. P., 15.XII.84 - 10.II.85 S&JPeck, FIT, 900 m Nothofagus grove on ash ; 1♂, 3♀♀, CHILE: Cautin; 21 km NE Pucon, Lago Caburga 15.XII.84 - 10.II.85 S&JPeck, FIT, 600 m mixed forest remnant ; 1♀, CHILE: Osorno; Puyehue Nat.P; Aguas Calientes 18.XII.84 - 8.II.85 S&JPeck, 600 m, malaise Nothofagus forest ; 1♀, CHILE: IX Reg. Prov. Malleco , NP Tolhuaca sect . Laguna Malleco 900 m, 23-27.I.1996 D. Burckhardt nr 61a (all MHNG) ; 1 ex., CHILE: Region IX ( Araucaria ) Prov. Malleco Weg zur Laguna Blanca 22 km ENE Curacautin Araucaria-Nothofagus Mischwald [mixed forest], 1250-1450 m 38°21’S, 71°39’W, Totholz, Laub, Moos [dead wood, leaf litter, moos], 11.I.2006, leg. M. Schülke ( ZMUB) .

D e s c r i p t i o n: Length 1.35-1.65 mm, width 0.74-0.91 mm. Head and most of body ochraceous, pronotum sometimes darkened, brown along base and near anterior margin, elytra darkened, brown in middle part of disc, apical abdominal segments light brown, femora ochraceous, tibiae and tarsi lighter than femora, antennae light brown to yellowish. Eye width about as two thirds of shortest interval between eyes. Length/width ratios of antennomeres as: III 18/6: IV 21/7: V 24/7: VI 21/7: VII 26/10: VIII 22/9: IX 30/15: X 36/17: XI 55/19. Dorsal and ventral sides of body not microsculptured, punctation very fine, hardly visible at 40 times magnification, fine punctures bordering submesocoxal lines and base of ventrite 1 excepted. Tip of scutellum exposed. Elytra widest posterior basal fifth, weakly narrowed from widest point toward apices, lateral margins straight, except near base and apices; sutural striae not shortened, curved along pronotal lobe and extended to mid-width of elytral base, adsutural areas raised. Mesepimera about three times as long as wide and two times as long as intervals between them and mesocoxae. Mesal part of metaventrite flattened, lacking impressions, with patches of admesal setiferous punctures. Submesocoxal areas moderately convex, 0.03-0.04 mm long, long as fifth to fourth of shortest intervals between them and metacoxae. Metanepisterna flat, nearly parallel-sided, in middle about 0.03 mm wide. Tibiae straight, thickened apically.

Male characters: Protarsomeres I-III hardly widened. Aedeagus as Figs 13-16 , 0.45- 0.50 mm long.

E t y m o l o g y: The species epithet is a Latin adjective meaning varicoloured.

C o m m e n t s: This species may be distinguished from its Chilean congeners having complete sutural striae of elytra by the darkened middle of the elytra and the small submesocoxal areas. The aedeagus with a small circular sclerite and vesicles bearing minute scale-like structures is unique.

Figures

Figs 8-13: Aedeagi of Baeocera, in dorsal view; (8) B. jarmilae nov.sp., paramere, scale = 0.1 mm; (9) ditto, internal sac, scale = 0.1 mm; (10) B. stewarti nov.sp., scale = 0.1 mm; (11) ditto, parameres, scale = 0.1 mm; (12) ditto, internal sac, scale = 0.05 mm; (13) B. variicolorata nov.sp., scale = 0.1 mm.

Figs 14-19: Aedeagi of Baeocera, in dorsal view; (14) B. variicolorata nov.sp., parameres, scale = 0.1 mm; (15, 16) ditto, internal sac, scale = 0.05 mm; (17) B. villaricensis nov.sp., scale = 0.1 mm; (18) ditto, parameres, scale = 0.1 mm; (19) ditto, internal sac, scale = 0.05 mm.