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

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.

Igor J. Kaprus', State Museum of Natural History, Ukrainian National Academy of Sciences, Teatral'na St.18, UA-79008 L'viv, Ukraine
Wanda M. Weiner, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Slawkowska 17, Pl-31016 Kraków, 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). Third antennal segment sense organ with 4 papillae............ 2
      Third antennal segment sense organ with 5 papillae............ 3
 
2(1). Pseudocellar formula dorsally: 10, 9/6, 15, 15/15, 19, 18, 22,
        9; pseudocellar formula ventrally: 3/000/32130. multiperforata
      Pseudocellar formula dorsally: 3, 2/1, 3, 3/3, 3, 3, 4, 3;
        pseudocellar formula ventrally: 2/000/00000.......... absoloni
 
3(1). First thoracic tergum with 0 + 0 pseudocelli.................. 4
      First thoracic tergum with 1 + 1 pseudocelli.................. 6
 
4(3). Second thoracic tergum with 2 + 2 pseudocelli; third thoracic
        tergum with 2 + 2 pseudocelli, pseudocellar formula dorsally:
        32/022/33343, third thoracic tergum without microsensilla.....
         ..................................................... hackeri
      Second thoracic tergum with 3 + 3 pseudocelli; third thoracic
        tergum with 3 + 3 pseudocelli............................... 5
 
5(4). Pseudocellar formula dorsally: 32/033/33343; third thoracic
        tergum without microsensilla; thoracic sternum ii with 1 + 1
        chaetae............................................... natalie
      Pseudocellar formula dorsally: 32/033/33353; third thoracic
        tergum with microsensilla present; thoracic sternum ii without
        chaetae............................................ interrupta
 
6(3). Pseudocellar formula dorsally: 32/133/33343; pseudocellar
        formula ventrally: 2/000/00010.................... pieninensis
      Pseudocellar formula dorsally: 32/133/44454; pseudocellar
        formula ventrally: 2/000/11120........................ uralica

Differential diagnoses

absoloni
Pseudocellar formula dorsally: 3, 2/1, 3, 3/3, 3, 3, 4, 3. Pseudocellar formula ventrally: 2/000/00000. Third antennal segment sense organ with 4 papillae.

hackeri
First thoracic tergum with 0 + 0 pseudocelli. Second thoracic tergum with 2 + 2 pseudocelli. Third antennal segment sense organ with 5 papillae. Third thoracic tergum with 2 + 2 pseudocelli, pseudocellar formula dorsally: 32/022/33343, third thoracic tergum without microsensilla.

interrupta
First thoracic tergum with 0 + 0 pseudocelli. Pseudocellar formula dorsally: 32/033/33353. Second thoracic tergum with 3 + 3 pseudocelli. Third antennal segment sense organ with 5 papillae. Third thoracic tergum with microsensilla present. Third thoracic tergum with 3 + 3 pseudocelli. Thoracic sternum ii without chaetae.

multiperforata
Pseudocellar formula dorsally: 10, 9/6, 15, 15/15, 19, 18, 22, 9. Pseudocellar formula ventrally: 3/000/32130. Third antennal segment sense organ with 4 papillae.

natalie
First thoracic tergum with 0 + 0 pseudocelli. Pseudocellar formula dorsally: 32/033/33343. Second thoracic tergum with 3 + 3 pseudocelli. Third antennal segment sense organ with 5 papillae. Third thoracic tergum without microsensilla. Third thoracic tergum with 3 + 3 pseudocelli. Thoracic sternum ii with 1 + 1 chaetae.

pieninensis
First thoracic tergum with 1 + 1 pseudocelli. Pseudocellar formula dorsally: 32/133/33343. Pseudocellar formula ventrally: 2/000/00010. Third antennal segment sense organ with 5 papillae.

uralica
First thoracic tergum with 1 + 1 pseudocelli. Pseudocellar formula dorsally: 32/133/44454. Pseudocellar formula ventrally: 2/000/11120. Third antennal segment sense organ with 5 papillae.


References