Baeocera proclinata, Löbl, 2018

Löbl, Ivan, 2018, Supplement to the knowledge of the genera Baeocera ERICHSON, 1845 and Scaphobaeocera CSIKI, 1909 (Coleoptera, Staphylinidae, Scaphidiinae) of the People’s Republic of China, Linzer biologische Beiträge 50 (2), pp. 1295-1303 : 1297-1298

3.2 Baeocera proclinata nov.sp.

(Figs 7-13)

Type material: Holotype ♂, CHINA: Yunnan [CH07-11B] Baoshan Pref., Gaoligong Shan nr. Xiaoheishan N.R. , 35 km SE Tengchong , 2110 m, 24°50’16’’N 98°45’43’’E, decid. forest, litter, sifted, 4.VI.2007, M. Schülke ( ZMUB) . Paratypes: 1♂, 2♀♀, CHINA: Yunnan [CH07-16] Baoshan Pref., mountain range 25 km E Tengchong , 1850 m, 25°00’28’’N 98°38’07’’E, second. mixed forest, litter sifted, 1.VI.2007, leg. A. Pütz ( APPC, MHNG) ; 1♀, with the same data but M. Schülke ( ZMUB) ; 3 females, CHINA: Yunnan [CH07-18] Baoshan Pref. , mountain range 22 km E Tengchong, 1750 m, 24°49’29’’N 98°29’07’’E, second. forest, litter, dead wood, sifted, 2.VI.2007, M. Schülke ( ZMUB), MHNG ); 1♀, with the same data but collected by A. Pütz ( APPC) ; 1♂, 2♀♀, CHINA: Yunnan [CH07-17] Baoshan Pref. , mountain range 25 km E Tengchong, 1900 m, 24°48’28’’N 98°32’03’’E, dev. primary deciduous forest, litter, fungi sifted, 2.VI.2007, leg. A. Pütz ( APPC, MHNG) .

Description: Length 1.18-1.35 mm, width 0.80-0.92 mm. Body reddish-brown to black, femora and tibiae in lighter specimens as body, in darker specimens notably lighter than body, tarsi and antennomeres I to VI light brown to yellowish, antennomeres VII to XI light brown. Head with interocular distance 1.5 eye width. Length/width ratios of antennomeres as: III 27/6: IV 25/6: V 33/6: VI 26/6: VII 35/9: VIII 25/9: IX 37/10: X 34/19: XI 41/11. Pronotum and elytra not microsculptured, with lateral margins continuously arcuate. Pronotal punctation inconspicuous, sparse and very fine, consisting of punctures indistinct at 100x magnification. Exposed tip of scutellum minute, hardly visible. Elytra with lateral margins almost evenly rounded, sutural striae short, parallel and shallow, starting about 0.20 mm posterior tip of scutellum; basal striae absent. Elytral punctation coarse and dense, covering entire disc, punctures well delimited, many puncture diameters about as large as puncture intervals, some intervals distinctly larger than puncture diameters. Hind wings present. Hypomera impunctate. Metaventrite entirely coarsely and densely punctate, punctures as large as or larger than puncture intervals, small central area impunctate in some specimens. Submesocoxal lines parallel, submesocoxal areas 0.02 mm, about as fifth of intervals to metacoxae. Metanepisterna fused, sutures indicated by outer puncture rows of metaventrite. Entire surface of ventrite 1 coarsely and densely punctate, punctures similar as on metaventrite, basal puncture row not interrupted in middle, consisting of very slightly elongate punctures. Ventrite 2 with row of distinct puncture. Following ventrites extremely finely punctate. Tibiae straight.

Male characters: Protarsomeres 1 to 3 slightly wider than protarsomeres IV. Aedeagus as Figs 7-12, 0.40-0.44 mm long.

Female characters: Gonocoxite and gonostyle as Fig. 13. Differential diagnosis : This species is very similar to B. karenovicsi , particularly by the shape of the body, the elytra all over coarsely and densely punctate and with shortened sutural striae, and the metanepisterna fused. It may be readily distinguished by the very finely punctate pronotum, the narrower antennomeres VII and VIII, the metaventrite entirely or almost entirely coarsely punctate, the ventrite 1 entirely densely punctate, and the ventrite 2 bearing a coarse puncture row. The genital characters suggest relationship to S. karenovicsi , significant specific characters are the shape of the basal part of the parameres (seen in lateral view) and that of the sclerotized complex of the internal sac.

Etymology: The species epithet is a Latin adjective meaning inclined.

Figures

Figs 10-13: Baeocera proclinata nov.sp. genitalia. (10) Aedeagus in lateral view; (11) Paramere in ventral view, (12) Paramere in lateral view; (13) Gonocoxite and gonostyle. Figs 14-17: Baeocera repleta nov.sp., genitalia. (14) Aedeagus in dorsal view; (15) Aedeagus in lateral view; (16) Internal sac in dorsal view; (17) Paramere in ventral view. Scale-bars = 0.1 mm (10, 14, 15, 17); 0.05 mm (11, 12, 16); 0.03 mm (13).