http://www.collembola.org/key/anurida.htm - Last updated on 2014.03.31 by Frans Janssens
Checklist of the Collembola: Key to the species of Anurida

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).   Eyepatch with 7 + 7 or 8 + 8 ocelli.................... luciae
        Eyepatch with less than 7 + 7 ocelli........................ 2
 
2(1).   Mandibular teeth 10 or less................................. 3
        Mandibular teeth more than 10......................... amorita
 
3(2).   Terga pluri-chaetotic....................................... 4
        Terga without additional chaetae............................ 5
 
4(3).   Colour dark.......................................... maritima
        Colour white without dark pigment, even without eye spots.....
           .................................................. hammerae
 
5(3).   Axial group on second and third thoracic segment with 1
          p-chaeta, either p1 or p2................................. 6
        Axial group on second and third thoracic segment with 2
          p-chaeta, p1 or p2 (fig.4)................................ 8
 
6(5).   Sensilla p3 on second and third thoracic segment anterior to
          chaeta p4................................................. 7
        Sensilla p3 on second and third thoracic segment level with or
          posterior to chaeta p4.......................... ellipsoides
 
7(6).   Fourth to fifth abdominal segment with a3 chaeta........ narli
        Fourth to fifth abdominal segment without a3 chaeta... reducta
 
8(5).   Second and third thoracic segment in anterior position both p2
          and p3.................................................... 9
        Second and third thoracic segment in anterior position only
          one chaeta, either p2 or p3, or both of them level with or
          posterior to other p-chaeta.............................. 10
 
9(8).   First thoracic segment with many chaetae in more than 1 row...
           .................................................. hammerae
        First thoracic segment with not more than 4 + 4 chaetae in
          single row.......................................... beringi
 
10(8).  Ocelli absent.............................................. 11
        Ocelli present............................................. 17
 
11(10). Second and third thoracic segment sensilla p3 anterior to p4..
           .................................................. granaria
        Second and third thoracic segment sensilla p3 levelling with
          or posterior to p4....................................... 12
 
12(11). Fourth antennal segment with 2 lateral sensilla............ 13
        Fourth antennal segment with 2 usual lateral sensilla, a and
          b................................................ martynovae
        Fourth antennal segment with additional sensillum in lateral
          group.................................................... 15
 
13(12). Mandibular apical teeth in a line with other teeth. subarctica
        Mandibular apical teeth in an oblique row.................. 14
 
14(13). Maxillary third lamella serrate (fig.3)............ annatshagi
        Maxillary third lamella with 2 hooks (fig.32)....... sakhensis
 
15(12). Second and third thoracic segment chaeta p2 anterior to p1....
           ................................................... similis
        Second and third thoracic segment chaeta p2 posterior to p1...
           ........................................................ 16
 
16(15). First thoracic segment with 2 + 2 chaetae between subcoxal
          macrochaetae........................................ polaris
        First thoracic segment with 4 + 4 chaetae between subcoxal
          macrochaetae.................................. thalassophila
 
17(10). Eye spots dark............................................. 18
        Eye spots without pigment.................................. 27
 
18(17). Head with 3 + 3 ocelli..................................... 19
        Head with 4 + 4 ocelli..................................... 21
        Head with 5 + 5 ocelli..................................... 25
 
19(18). Maxillary third lamella serrate............................ 20
        Maxillary third lamella with 2 hooks................. interior
 
20(19). Mandibular apical teeth in a line with other teeth.. granulata
        Mandibular apical teeth in an oblique row (fig.2).............
           .............................................. bondarenkoae
 
21(18). Maxillary third lamella serrate................. papillosoides
        Maxillary third lamella with 2 hooks....................... 22
 
22(21). Fifth abdominal segment with p2 chaeta, sensilla p3 clearly
          moved anteriorly (fig.23)......................... papillosa
        Fifth abdominal segment without p2 chaeta, sensilla p3 level
          with other p-chaetae..................................... 23
 
23(22). Mandible with 3 + 2 teeth.................................. 24
        Mandible with 4 small apical teeth followed by 2 strong ones..
           ............................................. parapapillosa
 
24(23). Fourth antennal segment with 2 additional lateral sensilla....
           .................................................... weberi
        Fourth antennal segment with 4-6 additional sensilla (fig.25).
           ................................................ kolymensis
        Fourth antennal segment with usual set of sensilla (fig.5)....
           .................................................... azurea
 
25(18). Second and third thoracic segment in front of p3-p4 with 2
          chaetae of a-row......................................... 26
        Second and third thoracic segment in front of p3-p4 with one
          chaeta of a-row, a4............................ decemoculata
 
26(25). Maxillary third lamella serrate..................... tullbergi
        Maxillary third lamella with 2 hooks................ palustris
 
27(17). First to fourth abdominal segment with 2 + 2 p-chaetae between
          sensilla............................................. alpina
        First to fourth abdominal segment with 3 + 3 p-chaetae between
          sensilla (fig.35).................................. tatianae


References