Trisunius conlectus, Assing, 2015

Assing, Volker, 2015, A revision of Trisunius V. Three new species and additional records, including the first records of the genus from Vietnam (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 47 (2), pp. 1179-1190 : 1186

Trisunius conlectus nov.sp. ( Figs 7-12 )

T y p e m a t e r i a l: Holotype 3: " THAILAND [1] - Doi Inthanon , Maeaum, 18°32' N, 98°31'E, 1560 m, sifted near stream, 18.XII.2013, leg. Ob / Holotypus 3 Trisunius conlectus sp. n. det. V. Assing 2015" (cAss).

E t y m o l o g y: The specific epithet (Latin, adj ective: narrow) alludes to the conspicuously slender ventral process of the aedeagus, particularly in ventral view.

D e s c r i p t i o n: Body length 3.1 m m; length of forebody 1.7 mm. External characters ( Figs 7-8 ) as in T. scaphiformis , except as follows:

Head ( Fig. 8 ) m ore oblong, approximately 1.1 times as long as broad. Pronotum with extremely shallow, nearly obsolete microreticulation visible only at high m agnification (100 x) and with fine median furrow posteriorly. Posterior margin of tergite VIII weakly convex.

3: sternite VII ( Fig. 9 ) moderately transverse, pubescence not distinctly modified, posterior margin truncate; sternite VIII ( Fig. 10 ) weakly trans verse, posterior excision only 0.22 times as deep as length of sternite; aedeagus ( Figs 11-12 ) 0.42 m m long; ventral process very slender and apically acute, both in lateral and in ventral view.

C o m p a r a t i v e n o t e s: This species is characterized particularly by the distinctive shape of the ventral process of the aedeagus. It is additionally separated from the syntopic T. scaphiformis by the external characters indicated above, the shape of the male sternite VII, and the s maller posterior excision of the male sternite VIII. For illustrations of the male sexual characters of other Trisunius species see ASSING (2011, 2012, 2013, 2014).

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 the circumstances of collection are identical to those of T. scaphiformis .

Figures

Figs 7-12: Trisunius conlectus nov.sp.: (7) habitus; (8) forebody; (9) male sternite V II; (10) male sternite VIII; (11-12) aedeagus in lateral and in ventral view. Scale bars: 7: 1.0 mm; 8: 0.5 mm; 9- 10: 0.2 mm; 11-12: 0.1 mm.