Baeocera karenovicsi, 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 : 1296-1297

3.1 Baeocera karenovicsi nov.sp. ( Figs 1-6 )

Type material: Holotype ♂, CHINA: Yunnan [CH07-16] Baoshan Pref., mountain range 14 km E Tengchong , 1850 m, 25°00’28’’N 98°38’07’’E, second. mixed forest, litter sifted, 1.VI.2007, M. Schülke ( ZMUB) . Paratype, 1♀, with the same data as the holotype ( MHNG).

Description: Length 1.35 mm, width 0.89 mm. Body dark, reddish-brown, femora and tibiae as body, tarsi and antennomeres I to VI lighter, almost yellowish, antennomeres VII to XI light brown. Head with interocular distance 1.5 eye width. Length/width ratios of antennomeres as: III 21/6: IV 21/6: V 31/6: VI 28/7: VII 33/10: VIII 28/8: IX 37/12: X 38/14: XI 42/15. Pronotum and elytra not microsculptured, with lateral margins continuously arcuate. Pronotal punctation conspicuous and dense, consisting of well delimited punctures distinct at 20x magnification. Exposed tip of scutellum minute. 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 large than puncture diameters. Hind wings reduced. Hypomera impunctate. Mesepimera about two times as long as wide and 2.5 times as long as intervals to mesocoxae. Centre of metaventrite with mesal row of coarse punctures and narrow impunctate admesal areas. Almost entire lateral parts of metaventrite coarsely and densely punctate, many punctures as large as or larger than puncture intervals; narrow oblique areas anterior metacoxae impunctate. Submesocoxal lines convex, submesocoxal areas 0.03 mm, as quater of intervals to metacoxae. Metanepisterna fused, sutures indicated by outer puncture rows of metaventrite. Ventrite 1 with punctation coarse and dense, less dense near lateral margins than in middle, basal puncture row not interrupted in middle, consisting of hardly elongate punctures. Following ventrites extremely finely punctate. Tibiae straight.

Male characters: Protarsomeres not widened. Aedeagus as Figs 1-5 , 0.36 mm long.

Female characters: Gonocoxite and gonostyle as Fig. 6.

Differential diagnosis: This new species may be readily distinguished from its Chinese congeners by the body coarsely punctate in combination with the shortened sutural striae of the elytra. The puncture pattern on the median area of the metaventrite and the shape of the sclerotized structures of the internal sac are unique. The new species is similar to the Himalayan B. puncticollis LÖBL , thought its lacks hypomeral punctation and has significantly larger submesocoxal areas. Baeocera karenovicsi shares the fused metanepisterna, the small body-size, the puncture-pattern, and the internal sac bearing proximal compact sclerites with the members of the B. lenta and B. ceylonense groups (see LÖBL 1971, 1992) but lacks the long ejaculatory duct to part extruded in reposing position, which is a presumed synapomorphy of these two groups. In addition, the internal sac of the new species lacks a proximal tuft of spines which is an autapomorphy of the B. ceylonensis group.

Etymology: The species is dedicated to doctor Wolfram Karenovics (Geneva), in acknowledgement to his competency.

Figures

Figs 1-6: Baeocera karenovicsi nov.sp., genitalia. (1) Aedeagus in dorsal view; (2) Apical part of median lobe in lateral view; (3) Internal sac; (4) Paramere in ventral view; (5) Paramere in lateral view; (6) Gonocoxite and gonostyle. Fig. 7-9. Baeocera proclinata nov.sp., genitalia. (7) Aedeagus in dorsal view; (8) Internal sac in dorsal view; (9) Internal sac in lateral view. Scale-bars = 0.1 mm (1, 7); 0.05 mm (2-5, 8); 0.03 mm (6).