Nazeris xingmini Lin & Hu, 2021

Lin, Xiao-Bin & Hu, Jia-Yao, 2021, The Nazeris fauna of the Nanling Mountain Range, China (Coleoptera, Staphylinidae, Paederinae), ZooKeys 1059, pp. 117-133 : 117

Nazeris xingmini Lin & Hu sp. nov.

Figs 1 , 5-9 , 27

Type material.

Holotype: China: ♂: "China: Guangdong Prov., Shixing County, Chebaling N. R., 24°43'22"N, 114°15'22"E, 357 m, 19.viii.2020, Liang Tang leg." (SNUC). Paratypes: 1 ♂, same data as holotype; 1 ♂, 2 ♀♀, "China: Jiangxi Prov., Longnan County, Jiulianshan N. R., 24°30'59.23"N, 114°24'52.98"E, alt. 587 m, 16.viii.2020, Liang Tang leg." (SNUC).

Description.

Body length 6.4-7.5 mm; forebody length 3.2-3.4 mm.

Body (Fig. 1 ) dark brown; legs yellowish brown; antennae dark brown to light brown.

Head (Fig. 5 ) 1.02-1.12 times as long as wide; punctation very dense, moderately coarse, non-umbilicate, interstices lacking microsculpture; postocular portion approximately 1.6-2.1 times as long as eye length.

Pronotum (Fig. 5 ) 1.18-1.22 times as long as wide, 0.95-1.02 times as long and 0.83-0.91 times as broad as head; punctation non-umbilicate, moderately dense and as coarse as that of head; midline posteriorly with short and very narrow impunctate elevation; interstices lacking microsculpture.

Elytra (Fig. 5 ) 0.59-0.67 times as long as wide, 0.50-0.57 times as long and 0.96-1.09 times as broad as pronotum; punctation as dense as, and slightly coarser than that of pronotum; interstices lacking microsculpture.

Abdomen with punctation dense and rather coarse on tergites III-V, dense and less coarse on tergite VI, moderately dense and fine on tergites VII-VIII; interstices lacking microsculpture.

Male. Sternite VII (Fig. 6 ) with posterior margin truncate at middle. Sternite VIII (Fig. 7 ) with wide triangular posterior excision. Aedeagus (Figs 8 , 9 ) well sclerotized; with ventral process narrowed near middle in ventral view, with U-shaped excision at apex in ventral view, with pair of wing-like basal laminae ventrally; dorso-lateral apophyses moderately strong, distinctly curved in ventral view, curved dorsally and slightly widened at apices in lateral view, extending beyond apex of ventral process.

Distribution and habitat data.

The species is known from Chebaling in northern Guangdong and Jiulianshan in southern Jiangxi (Fig. 27 ). The specimens were collected by sifting leaf litter at altitudes of 357-587 m.

Comparative notes.

The new species is very similar to N. inaequalis Assing, 2014 in general appearance and separated only by the aedeagal characters: the apex of the ventral process is symmetric in ventral view (Fig. 8 ); dorso-lateral apophyses extending beyond the apex of the ventral process.

Etymology.

The species is named in honor of Xing-Min Wang (South China Agricultural University) who helped a lot during our collection in Nanling.

Figures

Figure 27. Map showing the distribution of Nazeris in Nanling Mountain Range A N. inaequalis B N. rubidus C N. nanlingensis D N. gaoleii E N. huaiweni F N. obtortus G N. huapingensis H N. alatus I N. exilis J N. chenyanae K N. latilobatus L N. maoershanus M N. rugosus N N. yuyimingi O N. biacuminatus P N. yanzhuqii Q N. xingmini R N. meihuaae S N. lichongi.

Figures 1 - 4. Male habitus of Nazeris spp 1 N. xingmini 2 N. huaiweni 3 N. meihuaae 4 N. lichongi. Scale bars: 1.0 mm.

Figures 5 - 9. Nazeris xingmini 5 forebody 6 male sternite VII 7 male sternite VIII 8 aedeagus in ventral view 9 aedeagus in lateral view. Scale bars: 1.0 mm (5); 0.5 mm (6 - 9).