Nazeris trapezilobus, Assing, 2017

Assing, Volker, 2017, A revision of Nazeris IX. Three new species from Nepal and additional records (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 49 (1), pp. 307-315 : 312-314

Nazeris trapezilobus nov.sp. ( Figs 11-15 )

T y p e m a t e r i a l: Holotype 3: " NEPAL, E, Therathum distr. , N Basantapur, 2650-2700 m, 28.-29.V.2016, leg. J. Schmidt, 27°10'21''N, 87°45'14''E A / Holotypus 3 Nazeris trapezilobus nov.sp. det. V. Assing 2016 " ( NME) . Paratypes: 433, 1♀: same data as holotype ( NME, cAss) ; 233: "E-NEPAL Sankhuwasabha / Therathum Distr., S of Gupha, 29-3000 m, 26. V.16, lg. Schmidt, 27°16'23''N 87°29'47''E " ( NME, cAss) .

E t y m o l o g y: The specific epithet is a noun in apposition and alludes to the trapezoid shape of the ventral process of the aedeagus in ventral view.

D e s c r i p t i o n: Coloration, size, and other external characters ( Fig. 11 ) as in the syntopic N. hebes , except as follows:

Punctation of abdomen slightly denser on average.

3: sternite VII ( Fig. 12 ) strongly transverse, approximately 1.9 times as broad as long (length measured along middle), with unmodified and rather dense pubescence, posterior margin broadly and distinctly concave, without median excision; sternite VIII ( Fig. 13 ) transverse, posterior excision V-shaped and approximately 0.28 times as deep as length of sternite, anterior to this excision with small impression without pubescence; aedeagus ( Figs 14-15 ) approximately 0.8 mm long and of distinctive shape; ventral process large, of trapezoid shape, and apically broadly concave in ventral view; dorso-lateral apophyses slender, moderately sclerotized, apically weakly dilated, and short, apically extending slightly beyond base of ventral process.

C o m p a r a t i v e n o t e s: Nazeris trapezilobus , too, belongs to the N. flavocaudatus group. Among the species of this group, it is characterized particularly by the strongly transverse and posteriorly distinctly concave male sternite VII and by the distinctive shape of the ventral process of the aedeagus. It is reliably distinguished from the syntopic N. hebes only by the different shape and denser pubescence of the male sternite VII, by the differently shaped posterior excision of the male sternite VIII, and by the shape 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 is identical to that of N. hebes . Two paratypes were collected in a close locality at the border of Therathum and Sankhuwasabha districts. The altitudes range from approximately 2700 to approximately 3000 m.

Body size (HL*HW+PL*PW)

Figures

Figs 9-15: Nazeris biapicalis nov.sp. (9), N. hebes nov.sp. (10), and N. trapezilobus nov.sp. (11- 15): (9-10, 13) male sternite VIII; (11) forebody; (12) male sternite VII; (14-15) aedeagus in lateral and in ventral view. Scale bars: 11: 1.0 mm; 9-10, 12-13: 0.5 mm; 14-15: 0.2 mm.