Lesteva, Latreille, 1797

Cheng, Zhi-Fei, Li, Li-Zhen & Peng, Zhong, 2019, New species and new records of Lesteva Latreille, 1797 (Coleoptera Staphylinidae: Omaliinae) from China, Zootaxa 4560 (1), pp. 1-39 : 34-36

Key to Lesteva of China

1. Lateral margins of pronotum with deep foveae............................................................... 2

- Lateral margins of pronotum without distinct foveae.......................................................... 5

2. Each elytron with three or four maculae.................................................................... 3

- Each elytron with one macula............................................................................ 4

3. Body larger (BL 5 mm); HL/HW ± 0.75; each elytron with four maculae. For illustrations see Rougemont (2000: fig. 12) and Shavrin (2014: fig. 4). (Shaanxi)............................................. L. septemmaculata Rougemont, 2000

- Body smaller (BL 3.82 mm); HL/HW Ĺ 0.70; each elytron with three maculae. For illustration see Shavrin (2014: fig. 3). (Guangxi)........................................................................ L. ruzickai Shavrin, 2014

4. Body brilliant metallic-blue; elytra with large round orange maculae; head transverse (HL/HW 0.78). For illustrations see Figs 17A , 18 E–F, 20A–C, Rougemont (2000: figs 10, 19a–b) and Shavrin (2017: figs 17–18). (Zhejiang, Jiangxi, Hubei).................................................................................. L. pulcherrima Rougemont, 2000

- Body without metallic lustre; elytra with obscure oblique reddish brown maculae; head approximately as long as broad (HL/ HW 0.98). For illustrations see Figs 17B , 18 G–H, 20D–F and Rougemont (2000: fig. 11). (Hebei, Shaanxi)........................................................................................ L. rufimarginata Rougemont, 2000

5. Parameres shorter than median lobe....................................................................... 6

- Parameres longer than or almost as long as median lobe...................................................... 16

6. Body smaller (BL 2.50 mm); EL/EW Ĺ 0.90. For illustrations see Figs 16A , 18 A–B, 19A–C. (Chongqing).. L. obesa sp. nov.

- Body larger (BL ± 2.75 mm); EL/EW ± 0.95................................................................ 7

7. Pronotum approximately as long as broad (PL/PW 1.00); disc of pronotum with three shallow longitudinal impressions. For illustrations see Rougemont (2017: figs 6, 6a). (Shaanxi)........................... L. obliquonotata Rougemont, 2017

- Pronotum weakly or distinctly transverse (PL/PW Ĺ 0.95); impressions on pronotum of different shape.................. 8

8. Pronotum weakly transverse (PL/PW 0.95); elytra distinctly longer than broad (EL/EW 1.23). For illustrations see Figs 7A , 8 E–F, 10A–C, Shavrin (2017: figs 4–12) and Rougemont (2000: figs 16a–b; 2017: figs 5, 5a). (Shaanxi, Gansu, Hubei, Anhui, Zhejiang, Jiangxi, Sichuan).................................................. L. dabashanensis Rougemont, 2000

- Pronotum more transverse (PL/PW Ĺ 0.90); elytra approximately as long as broad or somewhat longer than broad (EL/EW Ĺ 1.16)................................................................................................ 9

9. Median lobe with distinct round apex in ventral view........................................................ 10

- Median lobe with more or less acute apex in ventral view..................................................... 11

10. Body black; disc of pronotum with very weak irregular impressions; elytra with round or somewhat transverse maculae. For illustrations see Rougemont (2000: figs 7, 18). (Zhejiang, Jiangxi).................... L. flavopunctata Rougemont, 2000

- Body reddish brown; disc of pronotum with U-shaped impression; elytra with small subtriangular maculae near middle. For illustrations see Figs 2B , 3 G–H, 5D–F. (Anhui, Zhejiang)....................................... L. concava sp. nov.

11. Pronotum without evident impressions; elytra longer than broad (EL/EW 1.13). For illustrations see Rougemont (2017: figs 7, 7a). (Hubei)................................................................ L. miragricola, Rougemont, 2017

- Pronotum with impressions; elytra approximately as long as broad (EL/EW Ĺ 1.05)................................ 12

12. Disc of pronotum with obscure U-shaped impression; EL/PL Ĺ 1.85. For illustrations see Watanabe (2005: figs 1–4). ( Taiwan)................................................................................ L. chujoi Watanabe, 2005

- Disc of pronotum without U-shaped impression; EL/PL ± 1.90................................................. 13

13. Body yellowish brown; head distinctly transverse (HL/HW 0.71). For illustrations see Shavrin (2017: figs 15–16, 24). (Guangdong)............................................................................. L. jaechi Shavrin, 2017

- Body darker; head less transverse (HL/HW ± 0.75).......................................................... 14

14. Body brown; HW/PW ± 0.90; HL/HW Ĺ 0.80. For illustrations see Figs 12B , 13 G–H, 15D–F and Rougemont (2000: figs 4, 17). (Beijing, Ningxia)....................................................... L. huabeiensis Rougemont, 2000

- Body black; HW/PW Ĺ 0.85; HL/HW ± 0.85............................................................... 15

15. Body smaller (BL 2.8–3.0 mm); legs yellowish brown. For illustrations see Rougemont (2000: figs 2, 14). (Zhejiang)...................................................................................... L. mollis Rougemont, 2000

- Body larger (BL 3.8 mm); legs darker. For illustrations see Figs 1A , 3 A–B, 4A–C and Rougemont (2017: figs 8, 8a). (Sichuan)................................................................................ L. alesi Rougemont, 2017

16. EL/EW Ĺ 0.85; body reddish brown; internal sac of aedeagus with very long paired parallel structures. For illustrations see Shavrin (2015: figs 1, 3–4). ( Taiwan).................................................. L. smetanai Shavrin, 2015

- EL/EW ± 0.90; body more or less darker; structures in the internal sac of aedeagus of different shape................. 17

17. PL/PW ± 1.20; parameres with small lateral portion folded apically in ventral view. For illustrations see Shavrin (2014: figs 1– 2). (Jiangxi)........................................................................ L. hajeki Shavrin, 2014

- PL/PW Ĺ 1.10; parameres with different shape............................................................. 18

18. Pronotum without distinct impression..................................................................... 19

- Pronotum more or less with impression on the disc or base.................................................... 20

19. Body smaller (BL 3.03 mm); PL/PW Ĺ 0.80; parameres very slender. For illustrations see Figs 6B , 8 C–D, 9D–F, Shavrin (2000: figs 10–11, 20) and Kim & Ahn (2011: figs 1, 5, 9, 13, 17, 19, 21–22). ( Russia, Korea, China: Heilongjiang)................................................................................... L. cordicollis Motschulsky, 1860

- Body larger (BL 4.1 mm); PL/PW ± 0.90; parameres wider. For illustrations see Rougemont (2000: figs 9, 24a–c). (Sichuan)............................................................................. L. davidiana Rougemont, 2000

20. Pronotum with discal or U-shaped impressions............................................................. 21

- Pronotum with more or less irregular impressions or with indistinct impressions................................... 27

21. Parameres with roundly broadened apical portion in ventral view. For illustrations see Figs 2A , 3 E–F, 5A–C and Ma, Li & Zhao (2012: figs 1, 3–5). (Anhui, Zhejiang)........................................... L. cala Ma, Li & Zhao, 2012

- Parameres with more slender apical portion in ventral view................................................... 22

22. Elytra with rufous suture and lateral margins; parameres slightly asymmetrical.................................... 23

- Elytra with black suture and lateral margins; parameres symmetrical............................................ 24

23. Body smaller (BL 2.8–3.5 mm); head and pronotum concolorous; head approximately as long as broad (HL/HW 1.04). For illustrations see Figs 7A , 8 E–F, 10A–C and Ma, Li & Zhao (2012: figs 2, 6–8). (Anhui, Zhejiang).................................................................................................. L. erythra Ma, Li & Zhao, 2012

- Body larger (BL 4.1 mm); head and pronotum bicolorous; head transverse (HL/HW 0.86). For illustrations see Rougemont (2017: figs 2, 2a). (Shaanxi, Sichuan)............................................... L. ruficollis Rougemont, 2017

24. Elytra with yellow or red roundish maculae near middle...................................................... 25

- Elytra with oblique orange maculae...................................................................... 26

25. Head distinctly transverse (HL/HW Ĺ 0.65); elytra approximately as long as broad (EL/EW Ĺ 1.05). For illustrations see Figs 12A , 13 E–F, 15A–C and Shavrin (2013: figs 1–3). (Jiangxi, Hunan).......................... L. fikaceki Shavrin, 2013

- Head weakly transverse (HL/HW 0.96); elytra longer than broad (EL/EW 1.14). For illustrations see Figs 1B , 3 C–D, 4D–F and Ma & Li (2012: figs 1–3). (Anhui, Zhejiang)........................................ L. brevimacula Ma & Li, 2012

26. Body smaller (BL 2.76–3.16 mm); elytra distinctly longer than broad (EL/EW 1.08–1.17); parameres and median lobe slender in ventral view. For illustrations see Figs 11A , 13 A–B, 14A–C. (Zhejiang)......................... L. elongata sp. nov.

- Body larger (BL 3.8 mm); elytra approximately as long as broad (EL/EW 1.04); parameres and median lobe wide in ventral view. For illustrations see Rougemont (2000: figs 22a–b). (Sichuan)................... L. aureomontis Rougemont, 2000

27. HL ± 0.80 mm; PL ± 0.90 mm. For illustrations see Rougemont (2000: figs 3, 15a–b). (Sichuan)....................................................................................................... L. nivalis Rougemont, 2000

- HL Ĺ 0.75 mm; PL Ĺ 0.85 mm .......................................................................... 28

28. EL ± 1.70 mm; elytra distinctly longer than broad (EL/EW 1.20). For illustrations see Figs 21B , 22 C–D, 23D–F and Rougemont (2000: figs 5, 23a–c). (Anhui, Zhejiang, Hubei, Jiangxi)........................ L. submaculata Rougemont, 2000

- EL Ĺ 1.65 mm; elytra approximately as long as broad or somewhat longer than broad (EL/EW Ĺ 1.15)................. 29

29. Parameres distinctly longer than median lobe............................................................... 30

- Parameres approximately as long as or slightly longer than median lobe......................................... 31

30. Body testaceous; elytra somewhat longer than broad (EL/EW 1.13); median lobe wider. For illustrations see Figs 16B , 18 C–D, 19D–F and Li, Li & Zhao (2005: figs 1–5). (Anhui, Zhejiang, Guizhou)................... L. ochra Li, Li & Zhao, 2005

- Body black; elytra approximately as long as broad (EL/EW 1.00); median lobe more slender. For illustrations see Shavrin (2017: figs 21–22, 25). (Hubei)................................................... L. schoenmanni Shavrin, 2017

31. Elytra without maculae................................................................................ 32

- Elytra with an obscure or distinct maculae................................................................. 33

32 Pronotum and elytra with finer and denser punctation; legs pitchy black. For illustrations see Rougemont (2017: figs 4, 4a). (Hubei).................................................................... L. lignipisces Rougemont, 2017

- Pronotum and elytra with coarser and sparser punctation; legs reddish brown. For illustrations see Rougemont (2000: figs 25ab). (Yunnan)................................................................ L. yunnanicola Rougemont, 2000

33. Elytra with distinct roundish maculae..................................................................... 34

- Elytra with different shaped maculae..................................................................... 36

34. HL/HW ± 0.85; aedeagus wide. For illustrations see Figs 6A , 8 A–B, 9A–C, Rougemont (2000: figs 1, 13) and Shavrin (2017: figs 1–2). (Anhui, Zhejiang, Hubei, Jiangxi)............................................... L. cooteri Rougemont

- HL/HW Ĺ 0.80; aedeagus very slender.................................................................... 35

35. Body larger (BL 4.4–5.0 mm); head weakly transverse (HL/HW 0.73). For illustrations see Figs 21A , 22 A–B, 23A–C, Rougemont (2000: figs 8, 20a–b) and Shavrin (2017: figs 19–20). (Beijing, Qinghai, Jiangsu, Anhui, Zhejiang, Hunan, Chongqing)................................................................ L. rufopunctata rufopunctata Rougemont, 2000

- Body smaller (BL 3.70–3.80 mm); head distinctly transverse (HL/HW 0.65). For illustrations see Shavrin (2015: figs 2, 5–6). ( Taiwan)............................................................. L. rufopunctata taiwanica Shavrin, 2015

36. Body black; elytra with large distinctly rhombic maculae; aedeagus very slender. For illustrations see Figs 7B , 8 G–H, 10D–F, and Rougemont (2000: figs 6, 21a–b) and Shavrin (2017: figs 13–14). (Anhui, Jiangxi, Zhejiang, Hunan, Guizhou)......................................................................................... L. elegantula Rougemont

- Body more paler; elytra with small elongate macula; aedeagus wider............................................ 37

37. Head transverse (HL/HW 0.84); head and pronotum concolorous. For illustrations see Rougemont (2017: figs 3, 3a). (Shaanxi)......................................................................... L. qinlingmontis Rougemont, 2017

- Head less transverse (HL/HW 0.90); head and pronotum bicolorous. For illustrations see Rougemont (2017: figs 1, 1a). (Guizhou).................................................................... L. tonitrumontis Rougemont, 2017

Figures

FIGURE 1. Habitus (males) of Lesteva: A—L. alesi; B—L. brevimacula. Scale bar: 1.0 mm.

FIGURE 2. Habitus (males) of Lesteva: A—L. cala; B—L. concava sp. nov. Scale bar: 1.0 mm.

FIGURE 3. Abdominal tergite VIII and sternite VIII (males): L. alesi (A—abdominal tergite VIII, B—abdominal sternite VIII); L. brevimacula (C—abdominal tergite VIII, D—abdominal sternite VIII); L. cala (E—abdominal tergite VIII, F— abdominal sternite VIII); L. concava sp. nov. (G—abdominal tergite VIII, H—abdominal sternite VIII). Scale bar: 0.1 mm.

FIGURE 6. Habitus (males) of Lesteva: A—L. cooteri; B—L. cordicollis. Scale bar: 1.0 mm.

FIGURE 7. Habitus (males) of Lesteva: A—L. dabashanensis; B—L. elegantula. Scale bar: 1.0 mm.

FIGURE 8. Abdominal tergite VIII and sternite VIII (males, dorsal view) of Lesteva: L. cooteri (A—abdominal tergite VIII, B—abdominal sternite VIII); L. cordicollis (C—abdominal tergite VIII, D—abdominal sternite VIII); L. dabashanensis (E— abdominal tergite VIII, F—abdominal sternite VIII); L. elegantula (G—abdominal tergite VIII, H—abdominal sternite VIII). Scale bar: 0.1 mm.

FIGURE 11. Habitus (males) of Lesteva: A—L. elongata sp. nov.; B—L. erythra. Scale bar: 1.0 mm.

FIGURE 12. Habitus (males) of Lesteva: A—L. fikaceki; B—L. huabeiensis. Scale bar: 1.0 mm.

FIGURE 13. Abdominal tergite VIII and sternite (males, dorsal view) of Lesteva: L. elongata sp. nov. (A—abdominal tergite VIII, B—abdominal sternite VIII); L. erythra (C—abdominal tergite VIII, D—abdominal sternite VIII); L. fikaceki (E— abdominal tergite VIII, F—abdominal sternite VIII); L. huabeiensis (G—abdominal tergite VIII, H—abdominal sternite VIII). Scale bar: 0.1 mm.

FIGURE 16. Habitus (males) of Lesteva: A—L. obesa sp. nov.; B—L. ochra. Scale bar: 1.0 mm.

FIGURE 17. Habitus (males) of Lesteva: A—L. pulcherrima; B—L. rufimarginata. Scale bar: 1.0 mm.

FIGURE 18. Abdominal tergite VIII and sternite VIII (males, dorsal view) of Lesteva: L. obesa sp. nov. (A—abdominal tergite VIII, B—abdominal sternite VIII); L. ochra (C—abdominal tergite VIII, D—abdominal sternite VIII); L. pulcherrima (E— abdominal tergite VIII, F—abdominal sternite VIII); L. rufimarginata (G—abdominal tergite VIII, H—abdominal sternite VIII). Scale bar: 0.1 mm.

FIGURE 21. Habitus (males) of Lesteva: A—L. r. rufopunctata; B—L. submaculata. Scale bar: 1.0 mm.

FIGURE 22. Abdominal tergite VIII and sternite VIII (males, dorsal view) of Lesteva: L. r. rufopunctata (A—abdominal tergite VIII, B—abdominal sternite VIII); L. submaculata (C—abdominal tergite VIII, D—abdominal sternite VIII). Scale bar: 0.1 mm.