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

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.

Romuald J. Pomorski, Zoological Institute, Wroclaw University, Sienkiewicza 21, Pl-50-335 Wroclaw, Poland
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). Anal spines absent............................................ 2
      Anal spines present........................................... 3
 
2(1). Postantennal organ with 10-11 vesicles, their bases are oval and
        separated from each other.......................... caucasicus
      Postantennal organ with 11-14 vesicles, their bases are almost
        circular and sometimes in contact with each other.. hermonicus
 
3(1). Mesothoracic tergum with 2 + 2 pseudocelli; metathoracic tergum
        with 2 + 2 pseudocelli...................................... 4
      Mesothoracic tergum with 3 + 3 pseudocelli; metathoracic tergum
        with 3 + 3 pseudocelli........................... aestimabilis
 
4(3). Ventral tube of adult males with ventral organ consisting of 1 +
        1 thick, robust setae, multifurcate at the end..... vinolentus
      Ventral tube of adult males without ventral organ..... archivari

Differential diagnoses

aestimabilis
Anal spines present. Mesothoracic tergum with 3 + 3 pseudocelli. Metathoracic tergum with 3 + 3 pseudocelli.

archivari
Anal spines present. Mesothoracic tergum with 2 + 2 pseudocelli. Metathoracic tergum with 2 + 2 pseudocelli. Ventral tube of adult males without ventral organ.

caucasicus
Anal spines absent. Postantennal organ with 10–11 vesicles, their bases are oval and separated from each other.

hermonicus
Anal spines absent. Postantennal organ with 11–14 vesicles, their bases are almost circular and sometimes in contact with each other.

vinolentus
Anal spines present. Mesothoracic tergum with 2 + 2 pseudocelli. Metathoracic tergum with 2 + 2 pseudocelli. Ventral tube of adult males with ventral organ consisting of 1 + 1 thick, robust setae, multifurcate at the end.


References