Nazeris, Fauvel, 1873

Ma, Wen-Jing, Miao, Zheng-Yi & Hu, Jia-Yao, 2021, New data of Nazeris Fauvel from the Dayao Mountains, Guangxi, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 5016 (4), pp. 579-587 : 585-586

Key to species of Nazeris in Guangxi, China

1 Head with non-umbilicate punctation ( Fig. 14 ).............................................................. 2

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

2 Body length about 7.8 mm; dorso-lateral apophyses of aedeagus with wide and round apex ( Figs 17, 18 )............................................................................... Nazeris curvilaminatus Ma, Miao & Hu sp. n.

- Body length less than 6.2 mm; dorso-lateral apophyses of aedeagus with narrow apex.............................. 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. 1 )............................................................................ 5

- Body dark brown ( Fig. 2 )............................................................................. 16

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-lateral apophyses of aedeagus extending to the same level as the apex of ventral process....................... 8

- Dorso-lateral apophyses of aedeagus extending 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 Ventral process of aedeagus nearly triangular, with narrow apex in ventral view.................................. 10

- Ventral process of aedeagus broad, with wide apex in ventral view............................................. 11

10 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 ).......................... N. obtortus Assing, 2016

11 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..................................................... 12

12 Ventral process of aedeagus with small semi-circular excision 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........................................... 13

13 Ventral process of aedeagus with round apex in ventral view ( Hu et al. 2013: 87, Fig. 5 )............................ 14

- Ventral process of aedeagus with truncate apex in ventral view ( Hu & Li 2017: 336, Fig. 13 )........................ 15

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

- Dorso-lateral apophyses of aedeagus with narrow apex in lateral view ( Fig. 8 )...... N. shengtangus Ma, Miao & Hu sp. n.

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

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

16 Male sternite VII with small semi-circular emargination in middle of posterior margin ( Fig. 10 )...................... 17

- Male sternite VII lacking emargination or with very shallow emargination in middle of posterior margin............... 18

17 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-lateral apophyses of aedeagus very slender, not reaching apex of ventral process ( Fig. 12 ).................................................................................................. N. songi Ma, Miao & Hu sp. n.

18 Dorso-lateral apophyses of aedeagus extending slightly beyond apex of ventral process............................ 19

- Dorso-lateral apophyses of aedeagus not reaching apex of ventral process....................................... 20

19 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

20 Dorso-lateral apophysis of aedeagus greatly expanded in apical half ( Hu et al. 2012: 42, Fig. 34) ... N. grandis Hu & Li, 2012

- Dorso-lateral apophysis of aedeagus slender, not expanded in apical half........................................ 21

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

- Ventral process of aedeagus not extremely elongate......................................................... 22

22 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............................. 23

23 Posterior margin of male sternite VII slightly prominent at middle ( Hu & Li 2017: 338, Fig. 21); dorso-lateral apophysis 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 apophysis of aedeagus straight in lateral view ( Hu & Qiao 2019: 438, Fig. 34)............................ N. biacuminatus Hu & Qiao, 2019

Figures

FIGURE 19. 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. shengtangus; H—N. songi; I—N. curvilaminatus; J—N. damingshanus; K—N. longilobus; L—N. bihamatus; M—N. latilobatus; N—N. maoershanus; O—N. rugosus; P—N. yuyimingi; Q—N. biacuminatus; R—N. yanzhuqii; S—N. obtortus; T—N. huapingensis; U—N. alatus; V—N. exilis; W—N. chenyanae; X—N. fulongensis.

FIGURES 14–18. Nazeris curvilaminatus 14—forebody; 15—male sternite VII; 16—male sternite VIII; 17—aedeagus, in ventral view; 18—aedeagus, in lateral view. Scale bars: 0.5 mm

FIGURES 4–8. Nazeris shengtangus 4—forebody; 5—male sternite VII; 6—male sternite VIII; 7—aedeagus, in ventral view; 8—aedeagus, in lateral view. Scale bars: 0.5 mm

FIGURES 1–3. Habitus 1—Nazeris shengtangus; 2—N. songi; 3—N. curvilaminatus. Scale bars: 1 mm.

FIGURES 9–13. Nazeris songi 9—forebody; 10—male sternite VII; 11—male sternite VIII; 12—aedeagus, in ventral view; 13—aedeagus, in lateral view. Scale bars: 0.5 mm