Nazeris, Fauvel, 1873

Li, Xin-Meng, Wu, Wei-Ping & Hu, Jia-Yao, 2023, Three new species of Nazeris Fauvel from the Jiuwan Mountain, Guangxi, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 5360 (1), pp. 82-90 : 88-90

Key to species of Nazeris in Guangxi, China

1 Head withnon-umbilicatepunctation ( Ma et al., 2021: 585, Fig. 14)............................................. 2

- Head with umbilicate punctation ( Fig. 2A )................................................................. 4

2 Body length about 7.8 mm; dorso-lateral apophyses of aedeagus with wide and round apex ( Ma et al., 2021: 585, Figs 17, 18)..................................................................... Nazeris curvilaminatus Ma et al., 2021

- Body length less than 6.2 mm; dorso-lateralapophyses of aedeagus with narrow apex ( Hu & Li 2017: 337, Fig. 18)....... 3

3 Pronotum with narrow impunctate elevation in posteriorly half ( Hu & Li 2017: 337, Fig. 15); dorso-lateral apophyses of aedeagus not widened near middle in ventral view ( Hu & Li 2017: 337, Fig. 18)................. N. alatus Hu & Li, 2017

- Pronotum with unconspicuous or lacking impunctate elevation in posteriorly half ( Hu & Qiao 2019: 440, Fig. 35); dorso-lateral apophyses of aedeagus widened near middle in ventral view ( Hu & Qiao 2019: 440, Fig. 38).......................... ............................................................................ N. yanzhuqii Hu & Qiao, 2019

4 Body reddish brown ( Fig. 1A )........................................................................... 5

- Body dark brown ( Fig. 1C )............................................................................ 18

5 Head and pronotum with fine microsculpture ( Hu & Qiao 2019: 436, Figs 18, 19)............ N. rugosus Hu & Qiao, 2019

- Head and pronotum lacking microsculpture................................................................. 6

6 Abdomen with fine microsculpture on all tergites........................................... N. qini Hu & Li, 2012

- Abdomen lacking microsculpture......................................................................... 7

7 Dorso-lateralapophyses of aedeagus extending to the same level as the apex of ventral process....................... 8

- Dorso-lateral apophyses of aedeagus extending much shorter than ventral process or distinctly beyond apex of ventral process ................................................................................................... 9

8 Ventral process of aedeagus narrow, constricted to sharp apex in ventral view ( Hu et al. 2012: 36, Fig. 4 ).............................................................................................. N. dayaoensis Hu & Li, 2012

- Ventral process of aedeagus conspicuously broad, with round apex in ventral view ( Assing 2016: 307, Fig. 11).......................................................................................... N. latilobatus Assing, 2016

9 Dorso-lateral apophyses of aedeagus extending much shorter than ventral process ( Figs 4E, F )......... N. qingshuius sp. n.

- Dorso-lateralapophyses of aedeagus extending distinctly beyond apex of ventral process........................... 10

10 Apical half of ventral process of aedeagus nearly triangular, with narrow apex in ventral view ( Figs 3C, D )............. 11

- Apical half of ventral process of aedeagus broad, with wide apex in ventral view ( Hu & Li 2017: 334, Fig. 4 )........... 13

11 Male sternite VII with posterior margin nearly truncate at middle (Su et al. 2020: 246, Fig. 7B); dorso-lateral apophyses of aedeagus straight in lateral view (Su et al. 2020: 246, Fig. 7E)............................ N. fulongensis Su et al., 2020

- Male sternite VII with posterior margin shallowly emarginated at middle ( Hu & Li 2017: 334, Fig. 2 ); dorso-lateral apophyses of aedeagus bent dorsad in lateral view ( Hu & Li 2017: 334, Fig. 5 )............................................ 12

12 Dorso-lateralapophyses of aedeagus strongly curved backward near apex, resembling a hook ( Figs 3E, F )................ ................................................................................... N. jiuwanensis , sp. n.

- Dorso-lateralapophyses of aedeagus not curved backward near apex ( Hu & Li 2017: 334, Fig. 5 )... N. obtortus Assing, 2016

13 Ventral process of aedeagus provided with a pair of apically narrowed processes on dorsal side of the apex ( Hu et al. 2012: 38, Fig. 12)............................................................................ N. luoi Hu & Li, 2012

- Ventral process of aedeagus lacking processes near apex..................................................... 14

14 Ventral process of aedeagus with smallsemi-circularexcision at apex in ventral view ( Hu & Qiao 2019: 435, Fig. 15)............................................................................... N. maoershanus Hu & Qiao, 2019

- Ventral process of aedeagus lacking excision at apex in ventral view............................................ 15

15 Ventral process of aedeagus with round apex in ventral view ( Hu et al. 2013: 87, Fig. 4 )............................ 16

- Ventral process of aedeagus with truncate apex in ventral view ( Hu & Li 2017: 336, Fig. 13)........................ 17

16 Dorso-lateralapophyses of aedeagus with round apex in lateral view ( Hu et al. 2013: 87, Fig. 5 )................................................................................................. N. damingshanus Hu & Li, 2013

- Dorso-lateralapophyses of aedeagus with narrow apex in lateral view ( Ma et al. 2021: 582, Fig. 8)................................................................................................ N. shengtangus Ma et al., 2021

17 Dorso-lateralapophyses of aedeagus roundly widened at apex in ventral view ( Hu & Li 2017: 336, Fig. 13)......................................................................................... N. huapingensis Hu & Li, 2017

- Dorso-lateralapophyses of aedeagus narrowed at apex in ventral view ( Hu et al. 2012: 39, Fig. 16)... N. tani Hu & Li, 2012

18 Male sternite VII with small semi-circular emargination in middle of posterior margin ( Ma et al. 2021: 583, Fig. 10)..... 19

- Male sternite VII lacking emargination or with very shallow emargination in middle of posterior margin............... 20

19 Dorso-lateral apophyses of aedeagus very strong, extending beyond apex of ventral process ( Hu et al. 2012: 41, Fig. 28)................................................................................. N. megalobus Hu & Li, 2012

- Dorso-lateralapophyses of aedeagus very slender, not reaching apex of ventral process ( Ma et al. 2021: 583, Fig. 12)........................................................................................ N. songi Ma et al., 2021

20 Dorso-lateralapophyses of aedeagus extending slightly beyond apex of ventral process............................. 21

- Dorso-lateralapophyses of aedeagus not reaching apex of ventral process....................................... 22

21 Male sternite VII with posterior margin shallowly emarginated at middle (Hu & Li 2019: 437, Fig. 26); dorso-lateral apophyses of aedeagus slightly widened near apex in ventral view ( Hu & Qiao 2019: 437, Fig. 28)...... N. yuyimingi Hu & Qiao, 2019

- Male sternite VII with posterior margin truncate at middle ( Hu & Li 2017: 340, Fig. 26); dorso-lateral apophyses of aedeagus not widened near apex in ventral view ( Hu & Li 2017: 340, Fig. 28)....................... N. chenyanae Hu & Li, 2017

22 Dorso-lateralapophyses of aedeagus very strong, distinctly expanded in ventral view ( Figs 5C, D ).................... 23

- Dorso-lateralapophyses of aedeagus very slender, hardly expanded in ventral view................................ 24

23 Ventral process of aedeagus with V-shaped excision at apex in ventral view ( Hu et al. 2012: 42, Fig. 34); dorso-lateral apophyses of aedeagus with wide and round apex in ventral view ( Hu et al. 2012: 42, Fig. 34)............. N. grandis Hu & Li, 2012

- Ventral process of aedeagus lacking distinct excision at apex in ventral view ( Figs 5C, D ); dorso-lateral apophyses of aedeagus with narrow apex in ventral view ( Figs 5C, D )............................................... N. yangmeius sp. n.

24 Ventral process of aedeagus extremely elongate, about twice as long as dorso-lateral apophyses ( Hu et al. 2013: 88, Fig. 10).............................................................................. N. longilobus Hu & Li, 2013

- Ventral process of aedeagus not extremely elongate......................................................... 25

25 Apex of ventral process of aedeagus round ( Assing 2016: 307, Fig. 4 )...................... N. bihamatus Assing, 2016

- Apex of ventral process of aedeagus divided into two straight branches in ventral view ( Hu & Li 2017: 338, Fig. 23)..... 26

26 Posterior margin of male sternite VII slightly prominent at middle ( Hu & Li 2017: 338, Fig. 21); dorso-lateral apophyses of aedeagus slightly curved in lateral view ( Hu & Li 2017: 338, Fig. 24).......................... N. exilis Hu & Li, 2017

- Posterior margin of male sternite VII truncate at middle ( Hu & Qiao 2019: 438, Fig. 31); dorso-lateral apophyses of aedeagus straight in lateral view ( Hu & Qiao 2019: 438, Fig. 34)............................. N. biacuminatus Hu & Qiao, 2019

Figures

FIGURE 1. Habitus A Nazeris jiuwanensis; B N. qingshuius; C N. yangmeius. Scale bars: 1.0 mm.

FIGURE 2. Forebodies A Nazeris jiuwanensis; B N. qingshuius; C N. yangmeius. Scale bars: 1.0 mm.

FIGURE 3. Nazeris jiuwanensis A male sternite VII; B male sternite VIII; C, D aedeagus in ventral view; E, F aedeagus in lateral view. Scale bars: 0.5 mm.

FIGURE 4. Nazeris qingshuius A male sternite VII; B male sternite VIII; C, D aedeagus in ventral view; E, F aedeagus in lateral view. Scale bars: 0.5 mm.

FIGURE 5. Nazeris yangmeius A male sternite VII; B male sternite VIII; C, D aedeagus in ventral view; E, F aedeagus in lateral view. Scale bars: 0.5 mm.