Nazeris fibulatus, 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 : 368

Nazeris fibulatus sp. n.

( Figs 46–51 , Map 3 )

Type material: Holotype ♂: “ CHINA [3] – Yunnan, E Kunming, 24°55'43"N, 103°05'22"E, 2110 m, Xiaobailong Forest Park, 10.VIII.2014, V. Assing / Holotypus ♂ Nazeris fibulatus sp. n., det. V. Assing 2014” (cAss).

Paratypes: 3 ♂♂ [1 teneral]: same data as holotype (cAss) .

Etymology: The specific epithet is an adjective derived from the Latin noun fibula (clip, clamp) and alludes to the shape of the dorso-lateral apophyses.

Description: Species of moderate size; body length 5.8–6.7 mm; length of forebody 3.1–3.3 mm. Coloration: body black; legs and antennae yellowish.

Head ( Fig. 46 ) moderately oblong, 1.06–1.09 times as long as broad; lateral contours behind eyes smoothly curving towards posterior constriction in dorsal view, posterior angles obsolete; punctation very dense, moderately coarse, rather shallow, partly confluent, and distinctly umbilicate; interstices forming narrow ridges, without microsculpture. Eyes less than one-third as long as distance from poste- rior margin of eye to posterior constriction in dorsal view. Antenna approximately 1.9 mm long.

Pronotum ( Fig. 46 ) slender, approximately 1.25 times as long as broad and 0.85 times as broad as head; punctation very dense and much coarser than that of head; midline posteriorly with short and narrow impunctate glossy elevation; lateral portions without distinct impressions or elevations; interstices without microsculpture and glossy. Elytra ( Fig. 46 ) approximately 0.55 times as long as pronotum; humeral angles obsolete; punctation approximately as coarse and as dense as that of pronotum; interstices without microsculpture and glossy. Hind wings completely reduced. Metatarsomere I elongated, nearly as long as the combined length of II–V.

Abdomen approximately 1.2 times as broad as elytra; punctation coarse and dense on tergites III–V, slightly less dense on tergite VI, slightly less coarse and somewhat less dense on tergite VII; interstices without microreticulation; posterior margin of tergite VII with narrow rudiment of a palisade fringe; posterior margin of tergite VIII strongly convex.

♂: sternite VII ( Fig. 47 ) moderately transverse, approximately 1.35 times as broad as long, without conspicuous modifications; sternite VIII ( Fig. 48 ) transverse, approximately 1.2 times as broad as long, posterior excision V-shaped and approximately one-fourth as deep as length of sternite; aedeagus ( Figs 49–50 ) 1.0– 1.1 mm long; ventral process laterally compressed, with very narrow ventral surface ( Fig. 51 ), and apically obliquely truncate in lateral view; dorso-lateral apophyses strongly sclerotized, long, extending slightly beyond apex of ventral process, and of distinctive bisinuate shape.

Comparative notes: Nazeris fibulatus is distinguished from its congeners particularly by the morphology of the aedeagus (shape of dorso-lateral apophyses; long and ventrally sharp ventral process). The general morphology of the aedeagus is similar to that of some species of the N. cangicus group (see ASSING 2013) such as N. pungens ASSING, 2013 (Xue Shan near Lincang), N. lanuginosus ASSING, 2013 (Laobie Shan), N. peniculatus ASSING, 2013 (environs of Dali), N. barbatus ASSING, 2013 (Wuliang Shan), N. subdentatus ASSING, 2013 (Gaoligong Shan), and N. curvus ASSING, 2013 (Gaoligong Shan).

Distribution and natural history: The type locality is situated to the east of Kunming in eastern Yunnan ( Map 3 ). The specimens were sifted from pine and leaf litter in a secondary pine forest with broad-leaved undergrowth at an altitude of 2110 m. One of the paratypes is teneral.

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 46–58: Nazeris fibulatus sp. n. (46–51) and N. bulbosus sp. n. (52–58): forebody (46, 52); male sternite VII (47, 53); male sternite VIII (48, 54); aedeagus in lateral and in ventral view (49–50, 55–56); ventral process of aedeagus in ventral view (51); aedeagus in lateral and in ventral view in dry preparation (57–58). Scale bars: 46, 52: 1.0 mm; 47–50, 53–58: 0.5 mm; 51: 0.2 mm.