http://www.collembola.org/key/isotnola.htm - Last updated on 2017.10.31 by Frans Janssens
Checklist of the Collembola: Key to the species of Isotopenola

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.

Mikhail Potapov, Moscow State Pedagogical University, Moscow 129164, Russia
Anatoly Babenko, Institute of Ecology and Evolution RAN, Moscow 119071, Russia
Arne Fjellberg, Mageroveien 168, N-3145 Tjome, Norway
Penelope Greenslade, Research School of Biology, Australian National University, Australian Capital Territory 0200, Australia
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). Dens with about 7 anterior and 12 posterior chaetae (fig.1);
        postlabial chaetae 2 + 2............................. nilgiris
      Dens with one anterior and up to 6 posterior chaetae (fig.2);
        postlabial chaetae at least 3 + 3........................... 2
 

Fig.1.
 

Fig.2.
 
2(1). Postlabial chaetae 3 + 3 (fig.3a); terga of second thoracic
        segment to fifth abdominal segment with 55/44445
        macrosensilla, complete sensillar formula 66/55545 (fig.4)....
         ................................................... australis
      Postlabial chaetae at least 4 + 4 (fig.3b); terga with numerous
        macrosensilla (fig.5)....................................... 3
 

Fig.3.
 

Fig.4.
 

Fig.5.
 
3(2). Labial palp with 4 e-guard chaetae; first antennal segment with
        about 19 chaetae (fig.6)........................... loftyensis
      Labial palp with 5 e-guard chaetae (fig.7); first antennal
        segment with about 12-13 chaetae (fig.8)............. delicata

Fig.6.
 

Fig.7.
 

Fig.8.
 


Differential diagnoses

australis
Dens with one anterior and up to 6 posterior chaetae (fig.2). Postlabial chaetae at least 3 + 3. Postlabial chaetae 3 + 3 (fig.3a). Terga of second thoracic segment to fifth abdominal segment with 55/44445 macrosensilla, complete sensillar formula 66/55545 (fig.4).

delicata
Dens with one anterior and up to 6 posterior chaetae (fig.2). First antennal segment with about 12–13 chaetae (fig.8). Labial palp with 5 e-guard chaetae (fig.7). Postlabial chaetae at least 3 + 3. Postlabial chaetae at least 4 + 4 (fig.3b). Terga with numerous macrosensilla (fig.5).

loftyensis
Dens with one anterior and up to 6 posterior chaetae (fig.2). First antennal segment with about 19 chaetae (fig.6). Labial palp with 4 e-guard chaetae. Postlabial chaetae at least 3 + 3. Postlabial chaetae at least 4 + 4 (fig.3b). Terga with numerous macrosensilla (fig.5).

nilgiris
Dens with about 7 anterior and 12 posterior chaetae (fig.1). Postlabial chaetae 2 + 2.


References