http://www.collembola.org/key/superodo.htm - Last updated on 2017.10.31 by Frans Janssens
Checklist of the Collembola: Key to the species of Superodontella, partim Ukraine

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.

Ighor J. Kaprus, State Natural History Museum of NAS of Ukraine, UA-79008, L'viv, Ukraine
Frans Janssens, Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium

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). Thoracic terga ii, iii and fourth abdominal tergum with m1
        chaetae (fig.1)............................................. 2
      Thoracic terga ii, iii and fourth abdominal tergum without m1
        chaetae........................................... lamellifera
 

Fig.1.
 
2(1). Head with c2 chaetae; second and third thoracic tergum with four
        m-chaetae (fig.2).......................................... 3
      Head without c2 chaetae; second and third thoracic tergum with
        three m-chaetae (fig.1)..................................... 4
 

Fig.2.
 
3(2). First, second and third tibiotarsus with 14, 14 and 14 chaetae,
        respectively; anal spines present; antennal segment iii with
        12 chaetae............................................ rotunda
      First, second and third tibiotarsus with 17, 17 and 16 chaetae,
        respectively; anal spines absent; antennal segment iii with
        16-17 chaetae........................................ tyverica
 
4(2). Tenaculum with one chaeta (fig.3).................. montemaceli 1
      Tenaculum without chaeta...................................... 5
 

Fig.3.
 
5(4). Antennal segment iv with 13-14 subcylindrical sensilla; labium
        only with 3 + 3 chaetae; abdominal sterna ii and iii with 4 +
        4 and 6 + 6 chaetae, respectively............. multisensillata
      Antennal segment iv with 7-9 subcylindrical sensilla; labium
        with 7 + 7 chaetae; abdominal sterna ii and iii with 3 + 3 and
        5 + 5 chaetae, respectively................................. 6
 
6(5). Each anal valve with three hr-chaetae (fig.4b); antennal segment
        iv with 7 subcylindrical sensilla........................... 7
      Each anal valve with two hr-chaetae (fig.4a); antennal segment
        iv with 8-9 subcylindrical sensilla......................... 8
 

Fig.4.
 
7(6). Mucro large, as long as the dens; dens with five chaetae, three
        of them are serrated and stronger than others............ ruta
      Mucro very small, about 0.2 of dens; dens with five identical
        chaetae.............................................. huculica
 
8(6). First, second and third tibiotarsus with 15, 15 and 15 chaetae,
        respectively; sensory organ of antennal segment iii with
        equivalent sensilla and sensory rods (fig.5a); antennal
        segment iii with 10 chaetae.......................... andrzeji
      First, second and third tibiotarsus with 16, 16 and 15 chaetae,
        respectively; sensory organ of antennal segment iii with two
        small sensory rods and two very long sensilla (fig.5b);
        antennal segment iii with 12-13 chaetae........... montemaceli

Fig.5.
 


Endnotes

1 cf.


Differential diagnoses

andrzeji
Abdominal sterna ii and iii with 3 + 3 and 5 + 5 chaetae, respectively. Antennal segment iii with 10 chaetae. Antennal segment iv with 7–9 subcylindrical sensilla. Antennal segment iv with 8–9 subcylindrical sensilla. Each anal valve with two hr-chaetae (fig.4a). First, second and third tibiotarsus with 15, 15 and 15 chaetae, respectively. Head without c2 chaetae. Labium with 7 + 7 chaetae. Second and third thoracic tergum with three m-chaetae (fig.1). Sensory organ of antennal segment iii with equivalent sensilla and sensory rods (fig.5a). Tenaculum without chaeta. Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).

huculica
Abdominal sterna ii and iii with 3 + 3 and 5 + 5 chaetae, respectively. Antennal segment iv with 7–9 subcylindrical sensilla. Antennal segment iv with 7 subcylindrical sensilla. Dens with five identical chaetae. Each anal valve with three hr-chaetae (fig.4b). Head without c2 chaetae. Labium with 7 + 7 chaetae. Mucro very small, about 0.2 of dens. Second and third thoracic tergum with three m-chaetae (fig.1). Tenaculum without chaeta. Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).

lamellifera
Thoracic terga ii, iii and fourth abdominal tergum without m1 chaetae.

montemaceli
Abdominal sterna ii and iii with 3 + 3 and 5 + 5 chaetae, respectively. Antennal segment iii with 12–13 chaetae. Antennal segment iv with 7–9 subcylindrical sensilla. Antennal segment iv with 8–9 subcylindrical sensilla. Each anal valve with two hr-chaetae (fig.4a). First, second and third tibiotarsus with 16, 16 and 15 chaetae, respectively. Head without c2 chaetae. Labium with 7 + 7 chaetae. Second and third thoracic tergum with three m-chaetae (fig.1). Sensory organ of antennal segment iii with two small sensory rods and two very long sensilla (fig.5b). Tenaculum without chaeta. Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).

montemaceli 1
Head without c2 chaetae. Second and third thoracic tergum with three m-chaetae (fig.1). Tenaculum with one chaeta (fig.3). Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).

multisensillata
Abdominal sterna ii and iii with 4 + 4 and 6 + 6 chaetae, respectively. Antennal segment iv with 13–14 subcylindrical sensilla. Head without c2 chaetae. Labium only with 3 + 3 chaetae. Second and third thoracic tergum with three m-chaetae (fig.1). Tenaculum without chaeta. Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).

rotunda
Anal spines present. Antennal segment iii with 12 chaetae. First, second and third tibiotarsus with 14, 14 and 14 chaetae, respectively. Head with c2 chaetae. Second and third thoracic tergum with four m-chaetae (fig.2). Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).

ruta
Abdominal sterna ii and iii with 3 + 3 and 5 + 5 chaetae, respectively. Antennal segment iv with 7–9 subcylindrical sensilla. Antennal segment iv with 7 subcylindrical sensilla. Dens with five chaetae, three of them are serrated and stronger than others. Each anal valve with three hr-chaetae (fig.4b). Head without c2 chaetae. Labium with 7 + 7 chaetae. Mucro large, as long as the dens. Second and third thoracic tergum with three m-chaetae (fig.1). Tenaculum without chaeta. Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).

tyverica
Anal spines absent. Antennal segment iii with 16–17 chaetae. First, second and third tibiotarsus with 17, 17 and 16 chaetae, respectively. Head with c2 chaetae. Second and third thoracic tergum with four m-chaetae (fig.2). Thoracic terga ii, iii and fourth abdominal tergum with m1 chaetae (fig.1).


References