Orsunius securifer, Assing, 2011

Assing, V., 2011, Orsunius gen. nov. from the Oriental region (Coleoptera: Staphylinidae: Paederinae: Medonina), Linzer biologische Beiträge 43 (1), pp. 221-244 : 240-241

Orsunius securifer nov.sp. ( Figs 77-83 )

T y p e m a t e r i a l: Holotype Ƌ: "Carin, Asciuii Ghecù, 1400-1500 m, L. Fea. III-IV.88 / Ex-Typis / I. R. Sc. N. B. / Paralectotypus Medon discipennis Fauvel , desig. V. Assing 2011 / Holotypus Ƌ Medon securifer nov.sp., det. V. Assing 2011" ( IRSNB).

C o m m e n t: The holotype belongs to the original type series of Medon discipennis FAUVEL.

D e s c r i p t i o n: Body length 4.4 mm. Habitus as in Fig. 77 . Coloration: head and pronotum bright reddish; elytra pale reddish, with the anterior two thirds infuscate, except for the suture and the humeral angles; abdomen reddish; legs and antennae yellowish-red.

Head nearly 1.2 times as broad as long ( Fig. 78 ); punctation coarse and dense, somewhat sparser in posterior median portion of dorsal surface; interstices without microsculpture; lateral margins with numerous long black setae. Eyes large and bulging, slightly longer than postocular portion in dorsal view. Anterior margin of labrum with distinct median incision.

Pronotum ( Fig. 78 ) transverse, 1.2 times as broad as long and nearly 1.1 times as wide as head; punctation similar to that of head; midline with rather broad, distinct, and complete impunctate band; margins with numerous long black setae.

Elytra slightly longer than pronotum ( Fig. 78 ); punctation very fine and dense; interstices without microsculpture. Hind wings present and apparently fully developed. Tarsi moderately short; protarsomeres I-IV distinctly dilated; metatarsomere I slightly shorter than the combined length of II and III.

Abdomen with fine, dense punctation and with pronounced microsculpture; posterior margin of tergite VII with palisade fringe.

Ƌ: sternite VII transverse, pubescence not distinctly modified ( Fig. 79 ); sternite VIII distinctly oblong and with truncate posterior margin ( Fig. 80 ); aedeagus with conspicuous long and large asymmetric ventral process of distinctive shape ( Figs 81-83 ).

E t y m o l o g y: The specific epithet (Latin, adjective: carrying an axe) refers to the shape of the ventral process of the aedeagus.

C o m p a r a t i v e n o t e s: This species is distinguished from the similar and syntopic O. discipennis particularly by the brighter coloration, the more slender habitus, the slightly less dense punctation of the head and pronotum, by the distinctly oblong male sternite VIII, as well as by the different shape of the ventral process of the aedeagus.

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type locality and other data are identical to those of O. discipennis .

Figures

Figs 77-83: Orsunius securifer nov.sp.: (77) habitus; (78) forebody; (79) male sternite VII; (80) male sternite VIII; (81) aedeagus in lateral view; (82) ventral process of aedeagus in ventral view; (83) apex of ventral process of aedeagus in lateral view. Scale bars: 77: 1.0 mm; 78: 0.5 mm; 79- 83: 0.2 mm.