http://www.collembola.org/key/tullidae.htm - Last updated on 2009.09.30 by Frans Janssens
Checklist of the Collembola: Key to the genera of Tullbergiidae

This key is still under construction. Note that missing figures will be provided as soon as possible. Currently, the key is in the feasibility study phase to find out how to integrate in the checklist in a modular way a key that has been generated with DELTA.

Rationale

The rationale for taxa used and not used as well as subtaxonomic classification for some taxa is to be provided.

Key

Note that no distinction between subtaxa and taxa is made in the key.

    
1(0).   Distal end of tibiotarsi with 2 groups of long clavate setae
          (fig.1a)....................................... Clavaphorura
        Distal end of tibiotarsi without clavate setae or seldom with
          few weakly developed ones (fig.1b)........................ 2

Fig.1.
   
2(1).   Sense organ of third antennal segment in adults with 2-3
          greatly thickened dorsal sensory clubs (fig.2c&d)......... 3
        Sense organ of third antennal segment in adults with one
          greatly thickened dorsal sensory club (fig.2a&b)......... 30

Fig.2.
   
3(2).   Abdomen vi with midventral projection - best seen in ventral
          view (fig.3).............................................. 4
        Abdomen vi without midventral projection.................... 7

Fig.3.
   
4(3).   Sense organ of third antennal segment with 2 dorsal sense
          clubs (fig.4)............................................. 5
        Sense organ of third antennal segment with 3 dorsal sense
          clubs (fig.2d).................................. Dinaphorura

Fig.4.
   
5(4).   Dorsum of sixth abdominal segment with supplementary "spines"
          in front of typical anal spines (fig.5)................... 6
        Dorsum of sixth abdominal segment without supplementary
          spines.......................................... Metaphorura

Fig.5.
   
6(5).   Anterior spines on sixth abdominal segment are mere granular
          projections (fig.5a)........................ Delamarephorura
        Anterior spines on sixth abdominal segment similar to more
          posterior "spines" (fig.5b).................... Marcuzziella
 

7(3).   Number of anal spines four or more.......................... 8
        Number of anal spines two.................................. 11
 

8(7).   Number of anal spines at most four.......................... 9
        Number of anal spines more than four (fig.6)..... Neonaphorura

Fig.6.
   
9(8).   Pseudocelli crescentic (fig.7a).................... Anaphorura
        Pseudocelli varied but not crescentic (fig.7b&c)........... 10

Fig.7.
   
10(9).  Postantennal organ rows of "tubercles" arranged in 4-7 units
          (fig.8a)..................................... Fissuraphorura
        Postantennal organ vesicles 40 or more, not arranged in
          distinct units (fig.8b)........................ Stenaphorura

Fig.8.
   
11(7).  Anal spines branched (fig.9).................... Neotullbergia
        Anal spines simple......................................... 12

Fig.9.
   
12(11). Postantennal organ oval to elongate linear. (fig.10a&b).... 13
        Postantennal organ rounded. (fig.10c)...................... 29

Fig.10.
   
13(12). Postantennal organ with 17 or more vesicles, in rows....... 14
        Postantennal organ with 5-8 vesicles only.................. 26
 

14(13). Postantennal organ tubercles in 2 clear rows for most of the
          organs' length (fig.10b)................................. 15
        Postantennal organ tubercles in at least 3 rows (fig.10a).. 24
 

15(14). Sense organ of third antennal segment with 2 dorsal sense
          clubs (fig.11a).......................................... 16
        Sense organ of third antennal segment with 3 dorsal sense
          clubs (fig.11b).......................................... 22

Fig.11.
   
16(15). Sixth abdominal segment with crescentic ridges behind
          pseudocelli and modified seta of fifth abdominal segment
          (fig.12)................................................. 17
        Sixth abdominal segment without crescentic ridges.......... 18

Fig.12.
   
17(16). Sixth abdominal segment dorsally smooth except for crescentic
          ridges.......................................... Mesaphorura
        Sixth abdominal segment with additional dorsal or lateral
          tubercles bearing strong bristles (fig.13)... Paratullbergia

Fig.13.
   
18(16). Pseudocelli of fifth abdominal segment in normal, lateral
          position................................................. 19
        Pseudocelli of fifth abdominal segments on adjacent dorsal
          tubercles (fig.14)............................... Boudinotia

Fig.14.
   
19(18). Dorsal trunk macrochaetae conspicuously longer than
          mesochaetae (fig.15)................................ Weinera
        Dorsal trunk setae all similar in size..................... 20

Fig.15.
   
20(19). Pseudocelli of fifth abdominal segment crescentic, like
          remaining trunk pseudocelli (fig.16a).................... 21
        Pseudocelli of fifth abdominal segment stellate, unlike
          remaining trunk pseudocelli (fig.16b)......... Psammophorura

Fig.16.
   
21(20). Number of tubercles in each row of the postantennal organ 16
          or fewer (fig.17a)............................... Pongeiella
        Number of tubercles in each row of the postantennal organ more
          than 200 (fig.17b)............................ Chaetophorura

Fig.17.
   
22(15). Postantennal organ rows of "tubercles" arranged in 4-7 units
          (fig.18)..................................... Fissuraphorura 1
        Postantennal organ vesicles 40 or more, not arranged in
          distinct tubercles....................................... 23

Fig.18.
   
23(22). Anal spine length 0. 3-0. 4 times as long as third claw.......
           ................................................. Tillieria
        Anal spine length 0. 8-1. 4 times as long as third claw.......
           ................................................ Tullbergia
 

24(14). Crescentic ridges absent on dorsum of sixth abdominal segment.
           ............................................. Chaetophorura 3
        Crescentic ridges on dorsum of sixth abdominal segment
          (fig.12)................................................. 25
 

25(24). Postantennal organ vesicles arranged in 5 or more rows for at
          least part of postantennal organ length (fig.19a)...........
           ............................................. Multivesicula
        Postantennal organ vesicles in 4 rows (fig.19b)...............
           ............................................ Granuliphorura

Fig.19.
   
26(13). Postantennal organ tubercles in 2 distinct rows............ 27
        Postantennal organ tubercles in depression, not in distinct
          rows (fig.20a&b)......................................... 28

Fig.20.
   
27(26). Sense organ of third antennal segment with 2 dorsal sense
          clubs............................................ Prabhergia
        Sense organ of third antennal segment with 3 dorsal sense
          clubs........................................ Fissuraphorura 2
 

28(26). Postantennal organ tubercles linear or anvil-shaped (fig.20a).
           ............................................... Karlstejnia
        Postantennal organ tubercles v- or y-shape, deeply divided
          (fig.20b)....................................... Wankeliella
 

29(12). Tergites none with more than 1 + 1 pseudocelli.. Tullbergiella
        Tergites some with more than 1 + 1 pseudocelli. Rotundiphorura
 

30(2).  Claws normal............................................... 31
        Claws with a handle-like basal and a shovel-like distal part
          (fig.21)...................................... Scaphaphorura

Fig.21.
   
31(30). Sense organ of third antennal segment with 1 swollen and 2
          slender sense clubs (fig.2a)..................... Tasphorura
        Sense organ of third antennal segment with 1 swollen sense
          club only (fig.2b)....................................... 32
 

32(31). Postantennal organ vesicles 6 (fig.22a)............... Jevania
        Postantennal organ vesicles at least 10 (fig.22b).......... 33

Fig.22.
   
33(32). Postantennal organ vesicle often with clear central stem and
          vesicles not depressed in integument (fig.22b).... Doutnacia
        Postantennal organ vesicle without central stem and vesicles
          depressed in integument (fig.23).............. Najtiaphorura

Fig.23.
  

Endnotes

1 The PAO tubercles of Fissuraphorura are papillate, and at certain levels of focus the tubercles may be obscured by the papillae, giving the impression of a large number of irregularly arranged tubercles.

2 Fissuraphorura is keyed out at several points because the postantennal organ looks different depending on the level of focus.

3 In Chaetophorura the number of sense clubs in the sense organ of the third antennal segment is variable.

References