Endonura

Smolis, Adrian & Kuznetsova, Nataliya, 2016, Remarkable diversity of the genus Endonura Cassagnau, 1979 (Collembola: Neanuridae: Neanurinae) in the Caucasus, Zootaxa 4200 (1), pp. 47-82 : 77-79

Key to the genus Endonura

Quite recently, in 2016, Smolis et al. published a key to all species of the genus (Smolis et al. 2016). Nevertheless, the seven new taxa described herein led us to provide an updated key to the genus.

1. Head with fusion of tubercles Af and Cl.................................................................. 2

- Head with separation of tubercles Af and Cl............................................................... 7

2. Chaeta O on head present.............................................................................. 3

- Chaeta O on head absent............................................................................... 4

3. Tubercles Di on th. I present and fused with De, tubercle (Di+Dl+L) on abd. V with 9 chaetae........................................................................................ E. poinsotae Deharveng, 1980 (France, Corsica)

- Tubercles Di on th. I absent, tubercle (Di+Dl+L) on abd. V with 7 chaetae........ E. ichnusae Dallai, 1983 (Italy, Sardinia)

4. Tubercles De on abd. I–III with 4 chaetae................................................................. 5

- Tubercles De on abd. I–III with 3 chaetae.......... E. granulata ( Cassagnau & Delamare Deboutteville, 1955) (Lebanon)

5. Tubercles Di and De on th. I fused, cryptopygy strongly developed........ E. gladiirostra Smolis & Kaprus’, 2003 (Israel)

- Tubercles Di and De on th. I separate, cryptopygy absent or weakly developed.................................... 6

6. Chaeta E on head present, Tubercle Dl on head with 4 chaetae................ E. tyrrhenica Dallai, 1983 ( Italy, Sardinia)

- Chaeta E on head absent, Tubercle Dl on head with 6 chaetae................ E. pejai Deharveng, 1980 ( France, Corsica)

7. Tubercle Af on head equal or shorter than tubercles Oc....................................................... 8

- Tubercle Af on head longer than tubercles Oc.............................................................. 9

8. Labrum with ventral sclerifications ogival and without prelabral chaetae............................................................................ E. gracilirostris Smolis, Skarżyński, Pomorski & Kaprus’, 2007 (Crimea, Moldova)

- Labrum with ventral sclerifications nonogival and with prelabral chaetae.............. E. taurica ( Stach, 1951) (Crimea)

9. Chaeta O on head present............................................................................. 10

- Chaeta O on head absent.............................................................................. 31

10. Eyes completely absent............................................................................... 11

- Eyes present........................................................................................ 12

11. Tubercles Di on th. I present....................................... E. arbasensis Deharveng, 1979 (France, Spain)

- Tubercles Di on th. I absent....................................... E. caeca ( Gisin, 1963) ( Bosnia and Herzegovina)

12. Anterior eye present and located outside tubercle Oc......... E. asiatica Smolis, Deharveng & Kaprus’, 2011 (Kyrgyzstan)

- Anterior eye present or absent, if present located within tubercle Oc........................................... 13

13. Anterior eye present................................................................................. 14

- anterior eye absent............................................. E. immaculata Deharveng, 1980 (France, Corsica)

14. Claw with inner tooth, tibiotarsi with long chaetae B4 and B5................................................ 15

- Claw without tooth, tibiotarsi with short chaetae B4 and B5.................................................. 17

15. Tubercle Dl on head with 3 chaetae, tubercles Di on th. II–III with 2 chaetae....... E. tetrophtalma ( Stach, 1929) ( Hungary)

- Tubercle Dl on head with 5 chaetae, tubercles Di on th. II–III with 3 chaetae..................................... 16

16. Chaeta E on head present, tubercles Di on th. I absent............. E. lusatica ( Dunger, 1966) ( Germany, Poland, Ukraine)

- Chaeta E on head absent, tubercles Di on th. I present........................................... E. aibgai sp. nov.

17. Chaeta E on head absent.............................................................................. 18

- Chaeta E on head present............................................................................. 20

18. Tubercle Cl on head with chaetae D, elementary tubercle DF present................ E. colorata ( Gama, 1964) ( Portugal)

- Tubercle Cl on head without chaetae D, elementary tubercle DF absent......................................... 19

19. Tubercle (L+So) on head with 8-9 chaetae, tubercles Di and De on th. I separate... E. cantabrica ( Deharveng, 1979) ( Spain)

- Tubercle (L+So) on head with 10 chaetae, tubercles Di and De on th. I fused.................. E. paracantabrica sp. nov.

20. Tubercle Dl on head with at least 6 chaetae............................................................... 21

- Tubercle Dl on head with less number of chaetae........................................................... 28

21. Tubercles Di on head present.......................................................................... 22

- Tubercles Di on head absent...................... E. dalensi Deharveng, 1979 (Andorra, France, Spain, Italy, Albania)

22. Body white........................................................................................ 23

- Body blue or bluish–grey............................................................................. 24

23. Tubercle (L+So) on head with 9 chaetae, macrochaetae thin and pointed.... E. deharvengi Cassagnau & Péja, 1979 (Greece)

- Tubercle (L+So) on head with 8 chaetae, macrochaetae thickened and blunt............................................................................................... E. levantica Smolis, Deharveng & Kaprus’, 2011 ( Israel)

24. Tubercle De on th. III with 2 ordinary chaetae........................ E. gladiolifer ( Cassagnau, 1954) (Algeria, Spain)

- Tubercle De on th. III with 3 ordinary chaetae............................................................. 25

25. Tubercle Cl on head with chaetae D, furca rudimentary with microchaetae....... E. alavensis Pozo & Simon, 1982 (Spain)

- Tubercle Cl on head without chaetae D, furca rudimentary without microchaetae................................. 26

26. Labrum with ventral sclerifications ogival, tubercles Di and De on th. I fused..... Endonura alticola ( Stach, 1951) (Russia)

- Labrum with ventral sclerifications nonogival, tubercles Di and De on th. I separate............................... 27

27. Tubercle (L+So) on head with 9 chaetae, free chaeta L on abd. IV present........................................................................................... E. quadriseta Cassagnau & Péja, 1979 (Greece, Turkey, Crimea)

- Tubercle (L+So) on head with 10 chaetae, free chaeta L on abd. IV absent............................................................................... E. reticulata ( Axelson, 1905) (Finland; Russia; Sweden; United States, Alaska)

28. Tubercles Di and De on th. I separate.................................... E. occidentalis ( Deharveng, 1979) ( Spain)

- Tubercles Di and De on th. I fused...................................................................... 29

29. Tubercle De on th. III with 2 ordinary chaetae, tubercle (Di+Di) on abd. V with 1-2+1-2 chaetae............................................................................................ E. cretensis ( Ellis, 1976) ( Greece, Israel)

- Tubercle De on th. III with 3 ordinary chaetae, tubercle (Di+Di) on abd. V with 3+3 chaetae........................ 30

30. Labrum with ventral sclerifications nonogival, chaeta E on head free........................... E. kremenitsai sp. nov.

- Labrum with ventral sclerifications ogival, chaeta E on head connected with tubercle Af........ E. diminutichaeta sp. nov.

31. Cryptopygy strong and complete, tubercles of abd. VI invisible in dorsal view. E. ludovicae ( Denis, 1948) ( France, Corsica)

- Cryptopygy absent or weak, tubercles of abd. VI well or partially visible in dorsal view............................ 32

32. Body bluish–grey................................................................................... 33

- Body white........................................................................................ 37

33. Claw with inner tooth, labrum chaetotaxy 4/2, 4........................................................... 34

- claw without inner tooth, labrum chaetotaxy 0/2, 2... E. ceratolabralis Smolis, Kahrarian, Piwnik & Skarżyński, 2016 (Iran)

34. Tubercle Dl on head with 6 chaetae................ E. dentifera Smolis, Skarżyński, Pomorski & Kaprus’, 2007 (Crimea)

- Tubercle Dl on head with 5 chaetae......................................................................35

35. Labrum elongated with ventral sclerifications ogival........................................ E. cryptopyga sp. nov.

- Labrum short with ventral sclerifications nonogival......................................................... 36

36. Chaeta E on head present, chaeta Ocp on head slightly shorter than chaeta A.......................................................................................... E. persica Smolis, Kahrarian, Piwnik & Skarżyński, 2016 ( Iran)

- Chaeta E on head absent, chaeta Ocp on head distinctly longer than chaeta A................. E. dobrolyubovae sp. nov.

37. Chaeta C on head absent.............................................................................. 38

- Chaeta C on head present............................................................................. 40

38. Macrochaetae Di1 on abd. V distinctly thickened and club–like................. E. baculifer Deharveng, 1979 ( Portugal)

- Macrochaetae Di1 on abd. V slightly thickened and cylindrical............................................... 39

39. Eyes present, tubercles Di on th. I present................................. E. transcaucasica ( Stach, 1951) (Georgia)

- Eyes absent, tubercles Di on th. I absent........................................ E. carpatica Smolis, 2006 ( Poland)

40. Tubercle Cl on head with chaetae D, elementary tubercle DF present........................................... 41

- Tubercle Cl on head without chaetae D, elementary tubercle DF absent......................................... 42

41. Chaeta E on head present, tubercle Dl on head with 6 chaetae........... E. tartaginenis Deharveng, 1980 ( France, Corsica)

- Chaeta E on head absent, tubercle Dl on head with 5 chaetae E. dichaeta Smolis, Kahrarian, Piwnik & Skarżyński, 2016 ( Iran)

42. Chaeta E on head present............................................................................. 43

- Chaeta E on head absent.............................................................................. 44

43. Eyes present, cauliflower-like tubercles on abd. V–VI absent.................................... E. ossetica sp. nov.

- Eyes absent, cauliflower-like tubercles on abd. V–VI present.... E. urotuberculata Pomorski & Skarżyński, 2000 (Bulgaria)

44. Chaeta L4 on head free, eyes absent or present unpigmented................................................. 45

- Chaeta L4 within tubercle (L+So), eyes present pigmented or unpigmented...................................... 47

45. Abd. V with 2 tubercles.................................... E. incolorata ( Stach, 1951) ( Poland, Ukraine, Romania)

- Abd. V with 3 tubercles............................................................................... 46

46. Abd. IV with 8 tubercles, macrochaetae Ml relatively short................. E. tatricola ( Stach, 1951) ( Poland, Slovakia)

- Abd. IV with 5 tubercles, macrochaetae Ml long.................. E. dudichi ( Loksa, 1967) ( Hungary, Poland, Slovakia)

47. Tubercle Dl on head with 6 chaetae, tubercle L on abd. III with 3 chaetae.... E. centaurea Cassagnau & Péja, 1979 (Greece)

- Tubercle Dl on head with 5 chaetae, tubercle L on abd. III with 4 chaetae......... E. saleri Fanciulli & Dallai, 2008 ( Italy)