Nazeris exilis Hu & Li, 2017

Li, Li-Zhen, 2017, Four new species of Nazeris Fauvel in Guangxi, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 4312 (2), pp. 333-342 : 338-339

Nazeris exilis Hu & Li , sp. n.

( Figs 8 , 20–24 , 30 )

Type material. Holotype: CHINA: male: " China: Guangxi Prov., Lingui County, Huaping N. R., Anjiangping , 1200 m, 13–16.VII.2011, Tang L. & He W. -J. leg." ( SNUC). Paratypes: 1 male, 5 females, same data as holotype ; 1 female, same data, except " 1320 m, 15.VII.2011, Tang & He leg." .

Description. Body length 6.7–7.3 mm; forebody length 3.4–3.7 mm.

Body ( Fig. 8 ) dark brown; antennae and legs yellowish brown.

Head ( Fig. 20 ) approximately as long as wide; punctation very dense, moderately coarse, distinctly umbilicate, interstices without microsculpture; postocular portion approximately 1.6 times as long as eye length.

Pronotum ( Fig. 20 ) 1.15–1.19 times as long as wide, 0.97–1.03 times as long and 0.85–0.88 times as broad as head; punctation non-umbilicate, moderately dense and as coarse as that of head; midline with narrow impunctate elevation in posteriorly half; interstices without microsculpture.

Elytra ( Fig. 20 ) 0.63–0.69 times as long as wide, 0.54–0.60 times as long and 0.95–1.00 times as broad as pronotum; punctation as dense as, and less coarse than that of pronotum; interstices without microsculpture.

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

Male. Sternite VII ( Fig. 21 ) with posterior margin weakly prominent at middle. Sternite VIII ( Fig. 22 ) with triangular posterior excision. Aedeagus ( Figs 23, 24 ) weakly sclerotized; ventral process long, with pair of small laminae in basal third, apex divided into two straight branches in ventral view; dorso-lateral apophyses slender, slightly curved ventrally in lateral view, not reaching apex of ventral process.

Distribution and habitat data. The species is known only from Huaping in northeast Guangxi ( Fig. 30 ). The specimens were collected by sifting leaf litter at altitudes of 1200–1320 m.

Comparative notes. This species is very similar in general appearance and aedeagal characters to N. divisus Hu & Li , but can be separated by larger body size and a narrower and longer ventral process of the aedeagus ( Fig. 23 ).

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

Figures

FIGURE 30. Map showing the distribution of Nazeris in Guangxi A – N. dayaoensis; B – N. luoi; C – N. tani; D – N. qini; E – N. megalobus; F – N. grandis; G – N. damingshanus; H – N. longilobus; I – N. bihamatus; J – N. latilobatus; K – N. obtortus; L – N. huapingensis; M – N. alatus; N – N. exilis; O – N. chenyanae.

FIGURES 6 – 9. Habitus of new species 6 – Nazeris huapingensis; 7 – N. alatus; 8 – N. exilis; 9 – N. chenyanae. Scale bars: 1 mm.

FIGURES 20 – 24. Nazeris exilis 20 – forebody; 21 – male sternite VII; 22 – male sternite VIII; 23 – aedeagus, in ventral view; 24 – aedeagus, in lateral view. Scale bars: 20: 1 mm, 21 – 24: 0.5 mm.