Nazeris latilobatus, Assing, 2016

Assing, Volker, 2016, A revision of Nazeris VIII. Five new species from China and additional records (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 48 (1), pp. 301-315 : 308-310

Nazeris latilobatus nov.sp. (Figs 7-12)

T y p e m a t e r i a l: Holotype 3: " CHINA, Guangxi, Maoershan , 23.viii.1998, J.R. Fellowes / Holotypus 3 Nazeris latilobatus nov.sp. det. V. Assing 2016" (cAss).

E t y m o l o g y: The specific epithet (Latin, adjective: with broad lobe) alludes to the broad ventral process of the aedeagus.

D e s c r i p t i o n: Body length 4.6 mm; length of forebody 2.5 mm. Coloration: body dark-reddish; legs pale-yellowish; antennae reddish-yellow, with antennomeres I-II palereddish.

Head (Fig. 8) approximately as long as broad; median portion of dorsal surface slightly elevated; punctation dense, moderately coarse, umbilicate, and partly confluent; interstices forming narrow ridges. Eyes approximately one-third as long as distance from posterior margin of eye to posterior constriction of head.

Pronotum (Fig. 8) 1.13 times as long as broad and 0.88 times as broad as head; punctation coarse (more so than that of head) and somewhat irregularly distributed in posterolateral portions; midline with narrow glossy band posteriorly.

Elytra (Fig. 8) 0.6 times as long as pronotum; punctation coarse and dense, denser than that of pronotum.

Abdomen 1.25 times as broad as elytra; punctation dense and coarse on tergites III-V, sparser and much finer on posterior tergites; interstices without microsculpture; posterior margin of tergite VII without palisade fringe.

3: posterior margin of sternite VII weakly concave in the middle; sternite VIII (Fig. 9) approximately 1.15 times as broad as long, posterior excision small, V-shaped, approximately one-sixth as deep as length of sternite; aedeagus (Figs 10-12) 0.62 mm long and of distinctive shape; ventral process conspicuously broad in ventral view and with nearly parallel lateral margins; dorso-lateral apophyses slender, apically not distinctly dilated and projecting slightly beyond apex of ventral process.

C o m p a r a t i v e n o t e s: As can be inferred particularly from the similar morphology of the aedeagus (ventral process broad in ventral view, at base with two semitransparent lateral processes; dorso-apical apophyses smoothly curved, apically not dilated and projecting slightly beyond apex of ventral process), but also from the similar external (size, coloration, habitus) and male secondary sexual characters (posterior margin of sternite VII weakly concave in the middle; posterior excision of sternite VIII small), N. latilobatus is closely allied to N. qini HU & LI, 2013 from the Dayao Shan (Guangxi) . It is distinguished from this species by the deeper posterior excision of the male sternite VIII, by the apically broader, nearly truncate ventral process of the aedeagus with subparallel lateral margins, and by the stouter dorso-lateral apophyses. The similar external and male sexual characters suggest that both N. latilobatus and N. qini are closely related to N. dayaoensis HU & LI, 2012 from the Dayao Shan (Guangxi) . For illustrations of N. qini and N. dayaoensis see HU et al. (2012).

Figs 13-22: Nazeris obtortus (13-17) and N. clavator (18-22): (13, 18) forebody; (14, 19) male sternite VIII; (15-16, 20-21) aedeagus in lateral and in ventral view; (17) apical portion of aedeagus in ventral view; (22) apical portion of aedeagus in lateral view. Scale bars: 13, 18: 1.0 mm; 14-17, 19-21: 0.2 mm; 22: 0.1 mm.

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: Theholotypewascollectedin the Maoer Shan, a mountain which hosts four locally endemic species of Lathrobium GRAVENHORST, 1802 and which is situated in the north of Guangxi province, at 25°51'N, 110°25'E ( PENG et al. 2012). Additional data are not available.