Protura

Shrubovych, Julia, 2014, Identification and character analysis of the Acerentomidae (Protura) of the northeastern Palearctic (Protura: Acerentomidae), Zootaxa 3755 (2), pp. 136-164 : 150-151

Key to Protura known from northeastern Asia

1 Spiracles present on mesonotum and metanotum............................................... (Eosentomata) ...2

- Spiracles absent … (Acerentomata)....................................................................... 3

2 Pseudoculus with three round granules, tergites VII and VIII with 6 A -setae.................... Eosentomon tshergense

- Pseudoculus without inner structures, tergite VII with 8 A -setae, tergite VIII with 4 A -setae............. Eosentomon asahi

3 Abdominal appendages I–III two-segmented ( Hesperentomidae ).......................... Hesperentomon martynovae

- Abdominal appendages I–II or only I two-segmented........................................................ 4

4 Second pair of abdominal legs two-segmented ( Protentomidae )............................. Proturentomon stebaevae

- Second pair of abdominal legs one-segmented ( Acerentomidae )................................................ 5

5 Striate band reduced, striae indistinct or absent.............................................................. 6

- Striate band well developed, striae distinct................................................................. 10

6 Labial palpi reduced to sensillum and three setae.............................................. ( Baculentulus ) … 7

- Labial palpi well developed with terminal tuft of setae and a sensillum........................ Tuxenentulus solncevae

7 Tergite VIII with 16 posterior setae, head seta d6 present.................................... Baculentulus potapovi

- Tergite VIII with 15 posterior setae, head seta d6 absent...................................................... 8

8 Tergite VII with 4 pairs of A -setae, with P1a and P3a setae present, sternite VIII with 6 setae........ Baculentulus borealis

- Tergite VII with 3 pairs of A -setae, with P1a and P3a setae absent, sternite VIII with 4 setae........................ 9

9 Sternite I with 4 P -setae, sternite XI with 6 setae......................................... Baculentulus loxoglenus

- Sternite I with 2 P -setae, sternite XI with 4 setae.......................................... Baculentulus pomorskii

10 Mesonotum and metanotum with 2 pairs of A -setae........................................... Sugaentulus andrzeji

- Mesonotum and metanotum with 3 or 4 pairs of A -setae...................................................... 11

11 Mesonotum and metanotum with 3 pairs of A -setae......................................................... 12

- Mesonotum with 3 pairs of A -setae, metanotum with 4 pairs of A -setae......................................... 25

12 Foretarsal sensillum t1 filiform......................................................................... 13

- Foretarsal sensillum t1 claviform............................................................ ( Yavanna ) … 21

13 Pronotum with 3 pairs of setae, calyx of maxillary gland heart-shaped, with strong papillae on large appendices............................................................................................. Callientomon chinensis

- Pronotum with 2 pairs of setae, calyx of maxillary gland with or without appendices, papillae on appendices absent...... 14

14 Calyx of maxillary gland small and weakly granulated, foretarsal sensillum t3 globular.................. Nienna parvula

- Calyx of maxillary gland large, heart-shaped and strongly granulated, foretarsal sensillum t3 leaf-shaped............... 15

15 Foretarsal seta β1 sensilliform; membranal pores on segments II–VI present....................... Noldo submontanus

- Foretarsal seta β1 setiform, membranal pores on segments II–VI absent ( Verrucoentomon ) .......................... 16

16 Mesonotum and metanotum with P2a’ setae, sternites IV–VI with 5 A -setae.................................... 17

- Mesonotum and metanotum without P2a’ setae, sternites IV–VI with 3 A -setae.................................. 18

17 Tergite I with 16 P -setae (seta P3a’ present), foretarsal sensilla c and e broad................... Verrucoentomon aurifer

- Tergite I with 14 P -setae (seta P3a’ absent), foretarsal sensilla c and e slender.................... Verrucoentomon joanis

18 Tergites I–VI with seta P1a, comb with straight hind margin................................................. 19

- Tergites I–VI without seta P1a, comb with concave hind margin........................... Verrucoentomon louisanne

19 Sternite I with 2 P -setae, sternite III with 5 P -setae..................................... Verrucoentomon kawakatsui

- Sternite I with 4 P -setae, sternite III with 6 P -setae......................................................... 20

20 Sternite VII with seta Pc, accessory setae on tergites I–VI long, setiform, head seta d6 absent.... Verrucoentomon shirampa

- Sternite VII without seta Pc, accessory setae on tergites I–VI short, sensilliform, head seta d6 presen..................................................................................................... Verrucoentomon anatoli

21 Seta P1a present on tergites I–VII, M2 present on prosternum, sternite III with 6 P- setae, head seta d6 present........... 22

- Seta P1a absent on tergites I–VI, M2 absent on prosternum, sternite III with 5 P- setae, head seta d6 absent............. 23

22 Mesonotal setae P1a and P2a of distinctly different lengths, with P2a very short; P4 on metanotum reduced, shorter than P3a; head setae d7 and sd7 equal in length, pronotal seta 1 about four times longer than seta 2............. Yavanna chimitovae

- Mesonotal setae P1a and P2a of equal length, P4 on metanotum longer than P3a, head seta d7 longer than seta sd7, pronotal seta 1 twice the length of seta 2 ............................................................ Yavanna baikalica

23 Foretarsal sensilla b and c nearly the same length, sensilla b and a’ thin......................................... 24

- Foretarsal sensillum b about twice the length of c, sensilla b and a’ thickened......................... Yavanna altaica

24 Sternite VII with seta Pc, foretarsal sensilla a, b and c’ about the same length, foretarsal seta δ4 setiform. Yavanna stebaevae

- Sternite VII without seta Pc, foretarsal sensilla a and c’ clearly longer than b, foretarsal seta δ4 thick and blunt.................................................................................................. Yavanna babenkoi

25 Foretarsal sensillum t1 baculiform ( Yamatentomon )......................................................... 26

- Foretarsal sensillum t1 filiform........................................................................ 27

26 Tergite VII with seta A4’, prosternum with seta M2......................................... Yamatentomon yamato

- Tergite VII lacking seta A4’, prosternum without seta M2 ................................. Yamatentomon kunnephupi

27 Calyx of maxillary gland small, metanotum without seta A1 but with seta A5 ( Filientomon )........................ 28

- Calyx of maxillary large, heart-shaped with distinct granulation, metanotum with seta A1, without seta A5 ( Nipponentomon , Imadateiella )....................................................................................... 29

28 Seta A1’ present on tergites I–VI, A4’ present on tergite VII, P3a present on tergites II–VI, head seta d6 absent........................................................................................ Filientomon duodecimsetosum

- Seta A1’ absent on tergites I–VI, A4’ absent on tergite VII, P3a absent on tergites II–VI, head seta d6 present................................................................................................. Filientomon sibiricum

29 Mesonotum and metanotum with P2a’ setae............................................................... 30

- Mesonotum and metanotum without P2a’ setae........................................................... 31

30 Tergite I with seta P0a, tergite VII with P1a seta, sternite VII with seta Pc, sternite VIII with 6 setae, pores sal absent......................................................................................... Nipponentomon taiga

- Tergite I without seta P0a, tergite VII without P1a seta, sternite VII without seta Pc, sternite VIII with 4 setae, pores sal pres- ent on sternites II–VII................................................................... Imadateiella murka

31 Tergite VI with seta P1a ............................................................................... 32

- Tergite VI without seta P1a ............................................................ Nipponentomon jaceki

32 Tergite VII with seta P1a ............................................................................. 33

- Tergite VII without seta P1a .................................................. Nipponentomon khabarovskense

33 Labrum protruded, sternites I–III with 5 A -setae, sternite III with 5 P -setae...................... Nipponentomon nippon

- Labrum not protruded, sternites I–III with 3 A -setae, sternite III with 6 P -setae.................................. 34

34 Sternite VII with 5 A -setae, sternite VI without seta Pc, claw with two inner teeth............. Nipponentomon bidentatum

- Sternite VII with 3 A -setae, sternite VI with seta Pc, claw with one inner tooth..................... Imadateiella sharovi