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

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, 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). Empodial appendage with distinct basal lamella................ 2
      Empodial appendage without basal lamella...................... 3
 
2(1). Claw with denticle; male ventral organ consists of 4 thickened
        setae on posterior edge of abdominal sternum iii and 4 such
        setae on onterior edge of fourth abdominal sternum.. subtenuis
      Claw without denticle; male ventral organ consists of 4 modified
        setae on posterior edge of abdominal sternum ii...... justynae
 
3(1). First to third abdominal terga with submedian seta m1 present. 4
      First to third abdominal terga without submedian seta m1...... 5
 
4(3). Claw with denticle; male ventral organ absent; tip of antenna
        with distinct cauliflower-like papilla.............. intricata
      Claw without denticle; male ventral organ present; tip of
        antenna without cauliflower-like papilla................. casa
 
5(3). Male ventral organ consisting of 14-22 setulae situated in 2
        pockets on abdominal sterna ii and iii; pseudocelli formula
        3[4]/011/1102[3]4[3-5]; vesicles in postantennal organ
        elongated................................................ bima
      Male ventral organ consisting of 4 thickened setae situated on
        posterior edge of abdominal sternum ii, 2 similar setae in the
        middle of abdominal sternum iii and 2 setae on anterior part
        of fourth abdominal sternum; pseudocelli formula
        3/011/1[0]1[0]023; vesicles in postantennal organ bean-like...
         ........................................................ tala

Differential diagnoses

bima
Empodial appendage without basal lamella. First to third abdominal terga without submedian seta m1. Male ventral organ consisting of 14–22 setulae situated in 2 pockets on abdominal sterna ii and iii. Pseudocelli formula 3[4]/011/1102[3]4[3–5]. Vesicles in postantennal organ elongated.

casa
Claw without denticle. Empodial appendage without basal lamella. First to third abdominal terga with submedian seta m1 present. Male ventral organ present. Tip of antenna without cauliflower-like papilla.

intricata
Claw with denticle. Empodial appendage without basal lamella. First to third abdominal terga with submedian seta m1 present. Male ventral organ absent. Tip of antenna with distinct cauliflower-like papilla.

justynae
Claw without denticle. Empodial appendage with distinct basal lamella. Male ventral organ consists of 4 modified setae on posterior edge of abdominal sternum ii.

subtenuis
Claw with denticle. Empodial appendage with distinct basal lamella. Male ventral organ consists of 4 thickened setae on posterior edge of abdominal sternum iii and 4 such setae on onterior edge of fourth abdominal sternum.

tala
Empodial appendage without basal lamella. First to third abdominal terga without submedian seta m1. Male ventral organ consisting of 4 thickened setae situated on posterior edge of abdominal sternum ii, 2 similar setae in the middle of abdominal sternum iii and 2 setae on anterior part of fourth abdominal sternum. Pseudocelli formula 3/011/1[0]1[0]023. Vesicles in postantennal organ bean-like.


References