http://www.collembola.org/key/achengia.htm - Last updated on 2009.09.30 by Frans Janssens
Checklist of the Collembola: Key to the species of Acherongia

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.

Erhard Christian, Institut für Zoologie, Universität für Bodenkultur, 1180 Wien, Autriche
Jean-Marc Thibaud, Laboratoire d'Entomologie, Museum National d'Histoire Naturelle, 75005 Paris, France
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). Flame shaped setae absent.............................. huetheri
      Flame shaped setae present.................................... 2
 
2(1). First abdominal segment tergal flame shaped setae absent; fifth
        abdominal segment tergal flame shaped setae absent; fourth
        abdominal segment tergal flame shaped setae absent; second
        abdominal segment tergal flame shaped setae absent; third
        abdominal segment tergal flame shaped setae absent.......... 3
      First abdominal segment tergal flame shaped setae present; fifth
        abdominal segment tergal flame shaped setae present; fourth
        abdominal segment tergal flame shaped setae present; second
        abdominal segment tergal flame shaped setae present; third
        abdominal segment tergal flame shaped setae present.... minima
 
3(2). Mesothoracic seta m1 absent; sensillae of the third antennal
        segment organ similar and ellipsoidal; metathoracic seta m1
        absent............................................... steineri
      Mesothoracic seta m1 present; sensillae of the third antennal
        segment organ not similar: one is cylindrical and curved, the
        other is disc shaped; metathoracic seta m1 present............
         ................................................ palatinensis

Differential diagnoses

huetheri
Flame shaped setae absent.

minima
Fifth abdominal segment tergal flame shaped setae present. First abdominal segment tergal flame shaped setae present. Flame shaped setae present. Fourth abdominal segment tergal flame shaped setae present. Second abdominal segment tergal flame shaped setae present. Third abdominal segment tergal flame shaped setae present.

palatinensis
Fifth abdominal segment tergal flame shaped setae absent. First abdominal segment tergal flame shaped setae absent. Flame shaped setae present. Fourth abdominal segment tergal flame shaped setae absent. Mesothoracic seta m1 present. Metathoracic seta m1 present. Second abdominal segment tergal flame shaped setae absent. Sensillae of the third antennal segment organ not similar: one is cylindrical and curved, the other is disc shaped. Third abdominal segment tergal flame shaped setae absent.

steineri
Fifth abdominal segment tergal flame shaped setae absent. First abdominal segment tergal flame shaped setae absent. Flame shaped setae present. Fourth abdominal segment tergal flame shaped setae absent. Mesothoracic seta m1 absent. Metathoracic seta m1 absent. Second abdominal segment tergal flame shaped setae absent. Sensillae of the third antennal segment organ similar and ellipsoidal. Third abdominal segment tergal flame shaped setae absent.

References