Orsunius heissi, Assing, 2014

Assing, V., 2014, On Orsunius II. Eight new species and additional records (Coleoptera: Staphylinidae: Paederinae: Medonina), Linzer biologische Beiträge 46 (1), pp. 461-479 : 474-476

Orsunius heissi nov.sp.

( Figs 40-43 , 47-48 , Map 2 )

Type material: Holotype: " Malaysia Kedah, Pulau Langkawi W, Talaga Tujuh env., 16.IV.2006, E. Heiss / Holotypus Orsunius heissi sp.n. det. V. Assing 2013" ( cAss) . Paratype: same data as holotype ( cAss).

Etymology: This species is dedicated to Ernst Heiss, distinguished Austrian specialist of Heteroptera, who collected the type specimens.

Description: Body length 3.5-3.6 mm; length of forebody 1.8-2.0 mm. Habitus as in Fig. 40 . Coloration: head reddish-brown to dark-brown; pronotum reddish-brown; elytra reddish, with the postero-lateral portion more or less distinctly and more or less extensively darker; abdomen reddish to reddish-brown; legs yellowish; antennae reddish.

Head ( Fig. 41 ) approximately 1.15 times as broad as long; posterior margin distinctly concave in the middle; punctation distinct and dense; interstices narrower than diameter of punctures and glossy, without microsculpture; sides with long dark-brown setae. Eyes large, approximately as long as postocular portion in dorsal view. Antennae slender, approximately 1.0 mm long; preapical antennomeres approximately as wide as long. Anterior margin of labrum with broadly V-shaped excision in the middle; left mandible with three, right mandible with four pronounced molar teeth.

Pronotum ( Fig. 41 ) 1.6-1.8 times as wide as long and 1.00-1.05 times as broad as head; posterior angles rounded, weakly marked; lateral and anterior margins with long dark setae; punctation very dense and distinctly granulose, rendering the pronotum matt; with or without rudiment of very narrow impunctate median band.

Elytra ( Fig. 41 ) 1.10-1.15 times as long as pronotum; punctation very dense, fine, and somewhat asperate. Hind wings fully developed. Protarsomeres I-IV distinctly dilated. Metatarsomere I longer than II and slightly shorter than the combined length of II and III. Abdomen narrower than elytra; punctation extremely fine and dense, barely noticeable in the microsculpture; posterior margin of tergite VII with palisade fringe.

: sternite VII with weakly concave posterior margin; sternite VIII ( Fig. 47 ) oblong and with relatively broad posterior excision of shallowly semi-circular shape ( Fig. 48 ); aedeagus ( Figs 42-43 ) small, 0.33 mm long; internal sac with a pair of broad-based curved apical structures and with a pair of slender basal structures.

Comparative notes: In addition to the slightly more distinct punctation of the head and the more densely and coarsely granulose punctation of the pronotum, O. heissi differs from the evidently closely related O. granulosus and O. cuneatus by the shape of the posterior excision of the male sternite VIII and by the morphology of the aedeagus (shapes of the ventral process and of the internal structures).

Distribution and natural history: The type locality is situated on Pulau Langkawi Island, Kedah, Malaysia ( Map 2 ). Additional data are not available.

Figures

Map 2: Distributions of Orsunius gladiator (white and black circles), O. latexcisus (black circle), O. flavovirgatus (black circle), O. heissi (black star), O. stimulans (black and grey triangles), O. granulosus (white and grey triangles), O. cuneatus (white diamond), and O. spathulatus (black square).

Figs 36-43: Orsunius cuneatus nov.sp. (36-39) and O. heissi nov.sp. (40-43): (36, 40) habitus; (37, 41) forebody; (38, 42) aedeagus in lateral view; (39, 43) aedeagus in ventral view. Scale bars: 36- 37, 40-41: 1.0 mm; 38-39, 42-43: 0.2 mm.

Figs 44-48: Orsunius cuneatus nov.sp. (44-46) and O. heissi nov.sp. (47-48): (44) male sternite VII; (45, 47) male sternite VIII; (46, 48) posterior portion of male sternite VIII. Scale bars: 44-45, 47: 0.2 mm; 46, 48: 0.1 mm.