http://www.collembola.org/key/heteraph.htm - Last updated on 2017.10.31 by Frans Janssens
Checklist of the Collembola: Key to the species of Heteraphorura, partim from Euro-Asia

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.

Javier I. Arbea, c/ Ría de Solía 3, ch. 39. E-39610 El Astillero, Cantabria, España
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). Vesicles in postantennal organ compound.......... oriental-group
      Vesicles in postantennal organ simple or multilobed........... 2
 
2(1). Vesicles in postantennal organ located parallely to the long
        axis of the organ.............................. nearctic-group
      Vesicles in postantennal organ located perpendicularly or
        oblique to the long axis of the organ....................... 3
 
3(2). First to third abdominal terga with submedian chaeta m1 present.
         ........................................................... 4
      First to third abdominal terga without submedian chaeta m1.... 5
 
4(3). Empodial appendage length equals 2/3 inner edge of the claw;
        basis of antenna usually with 3 pso.......... variotuberculata
      Empodial appendage very short, rudimental, does not extend to
        the denticle on claw; basis of antenna usually with 2 pso.....
         ................................................... carpatica
 
5(3). Basis of antenna with 2 pseudocelli.................. orientalis
      Basis of antenna with 3 pseudocelli.................... steineri

Endnotes

1 For the presence of 2+2 pseudocelli on abdominal tergum III, Heteraphorura edentata departs from Heteraphorura and is not included in this key.


Differential diagnoses

carpatica
Basis of antenna usually with 2 pso. Empodial appendage very short, rudimental, does not extend to the denticle on claw. First to third abdominal terga with submedian chaeta m1 present. Vesicles in postantennal organ simple or multilobed. Vesicles in postantennal organ located perpendicularly or oblique to the long axis of the organ.

nearctic-group
Vesicles in postantennal organ simple or multilobed. Vesicles in postantennal organ located parallely to the long axis of the organ.

oriental-group
Vesicles in postantennal organ compound.

orientalis
Basis of antenna with 2 pseudocelli. First to third abdominal terga without submedian chaeta m1. Vesicles in postantennal organ simple or multilobed. Vesicles in postantennal organ located perpendicularly or oblique to the long axis of the organ.

steineri
Basis of antenna with 3 pseudocelli. First to third abdominal terga without submedian chaeta m1. Vesicles in postantennal organ simple or multilobed. Vesicles in postantennal organ located perpendicularly or oblique to the long axis of the organ.

variotuberculata
Basis of antenna usually with 3 pso. Empodial appendage length equals 2/3 inner edge of the claw. First to third abdominal terga with submedian chaeta m1 present. Vesicles in postantennal organ simple or multilobed. Vesicles in postantennal organ located perpendicularly or oblique to the long axis of the organ.


References