Nazeris clavilobatus, Assing, 2014

Assing, Volker, 2014, A revision of Nazeris. VI. On the fauna of East Yunnan, China (Coleoptera: Staphylinidae: Paederinae), Beiträge Zur Entomologie = Contributions to Entomology 64 (2), pp. 355-373 : 370-372

Nazeris clavilobatus sp. n.

( Figs 59–67 , Map 3 )

Type material: Holotype ♂: “ CHINA [7] – Yunnan, mts W Dongchuan, 2620 m, 26°06'08"N, 102°54'46"E, pine for., 14.VIII.2014, V. Assing / Holotypus ♂ Nazeris clavilobatus sp. n., det. V. Assing 2014” (cAss).

Paratypes: 4 ♂♂, 1 ♀: same data as holotype (cAss) ; 2 ♀♀: same data, but leg. M. Schülke (cSch) .

Etymology: The specific epithet (Latin, adjective) alludes to the distinctly club-shaped dorso-lateral apophyses of the aedeagus.

Description: Species of relatively small size; body length 4.5–5.3 mm; length of forebody 2.4–2.7 mm. Forebody as in Fig. 59 . Coloration: head and elytra dark reddishbrown to blackish-brown; pronotum and abdomen blackish-brown to blackish, with the abdominal segments IX–X and the posterior margins of segments VII and VIII pale-reddish; legs and antennae yellowish. Abdominal tergite VIII and posterior portion of tergite VII with shallow microsculpture; posterior margin of tergite VIII weakly convex ( Fig. 60 ). Other external characters as in N. bulbosus .

♂: sternite VII ( Fig. 61 ) moderately transverse, approximately 1.5 times as broad as long, with sparse pubescence, without evident modifications; sternite VIII ( Fig. 62 ) approximately as broad as long, posterior excision relatively narrow and approximately one-fourth as deep as length of sternite; aedeagus ( Figs 63–66 ) approximately 0.96–1.0 mm long; ventral process moderately short and rather slender, lateral margins only weakly converging apically in ventral view ( Fig. 67 ); dorso-lateral apophyses stout, strongly curved (ventral view), strongly sclerotized, apically clubbed, and moderately long, extending beyond apex of ventral process.

Comparative notes: As can be inferred from the similar external and male sexual characters, N. clavilobatus is allied to N. zhangi and N. bulbosus . It is distinguished from both by the differently shaped ventral process and dorso-lateral apophyses of the aedeagus, from the latter additionally by the reddish apex of the abdomen, the presence of the microsculpture on tergite VII and VIII, the deeper and narrower posterior excision of the differently shaped male sternite VIII (not transverse), and by the longer aedeagus. For characters distinguishing N. clavilobatus from the highly similar N. conicus see the following section.

Distribution and natural history: The type locality is situated near the Sedan Snow Mountain Scenic Resort to the west of Dongchuan in northeastern Yunnan ( Map 3 ), not far from the type locality of N. brevilobatus . The specimens were sifted from litter, moss, and the roots of herbs in a secondary terraced pine forest at an altitude of 2620 m.

Figures

Map 3: Distribution of Nazeris species in eastern Yunnan (N. zhangi lineage: black symbols): N. clavilobatus sp. n. (black circle); N. conicus sp. n. (black square); N. bulbosus sp. n. (black diamond); N. zhangi WATANABE & XIAO (black triangle), N. fibulatus sp. n. (white circle); N. lamellatus sp. n. (white diamond); N. semifissus sp. n. (white triangle).

Figs 59–75: Nazeris clavilobatus sp. n. (59–67) and N. conicus sp. n. (68–75): forebody (59, 68); tergite VIII (60); male sternite VII (61, 69); male sternite VIII (62, 70–71); aedeagus in lateral and in ventral view (63–64, 72–73); aedeagus in lateral and in ventral view in dry preparation (65–66, 74–75); ventral process of aedeagus in ventral view (67). Scale bars: 59, 68: 1.0 mm; 60–66, 69–75: 0.5 mm; 67: 0.1 mm.