http://www.collembola.org/key/micrrura.htm - Last updated on 2009.09.30 by Frans Janssens
Checklist of the Collembola: Key to the species of Micraphorura, partim species from Ukraine

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
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). Sensory organ of third antennal segment with 4 papillae.........
         .................................................... absoloni
      Sensory organ of third antennal segment with 5 papillae....... 2
 
2(1). First thoracic tergum with 1 + 1 pseudocelli.................. 3
      First thoracic tergum without pseudocelli..................... 4
 
3(2). Pseudocellar formula dorsally: 32/133/33343; pseudocellar
        formula ventrally: 2/000/0001; subcoxae with 1-1-1
        pseudocelli............................................ irinae
      Pseudocellar formula dorsally: 32/133/44454; pseudocellar
        formula ventrally: 2/000/1112; subcoxae with 2-3-3
        pseudocelli........................................... uralica
 
4(2). Second and third thoracic tergum with 2 + 2 pseudocelli....... 5
      Second and third thoracic tergum with 3 + 3 pseudocelli.........
         .................................................. chatyrdagi
 
5(4). Pseudocellar formula per half abdominal tergum 22333..... eremia
      Pseudocellar formula per half abdominal tergum 33343.......... 6
 
6(5). Third thoracic tergum with lateral microsensilla........ steposa
      Third thoracic tergum without lateral microsensilla........ daii

Differential diagnoses

absoloni
Sensory organ of third antennal segment with 4 papillae.

chatyrdagi
First thoracic tergum without pseudocelli. Second and third thoracic tergum with 3 + 3 pseudocelli. Sensory organ of third antennal segment with 5 papillae.

daii
First thoracic tergum without pseudocelli. Pseudocellar formula per half abdominal tergum 33343. Second and third thoracic tergum with 2 + 2 pseudocelli. Sensory organ of third antennal segment with 5 papillae. Third thoracic tergum without lateral microsensilla.

eremia
First thoracic tergum without pseudocelli. Pseudocellar formula per half abdominal tergum 22333. Second and third thoracic tergum with 2 + 2 pseudocelli. Sensory organ of third antennal segment with 5 papillae.

irinae
Body size of adults 0.55–0.61 mm, or 1.00–1.20 mm. First thoracic tergum with 1 + 1 pseudocelli. Microsensilla on third thoracic tergum absent, or present. Postantennal organ as long as pseudocellus, or slightly longer than pseudocellus. Pseudocellar formula dorsally: 32/133/33343. Pseudocellar formula ventrally: 2/000/0001. Sensory organ of third antennal segment with 5 papillae. Sensory organ of third antennal segment with 2 granulated sensory clubs, or smooth sensory clubs. Subcoxae with 1–1–1 pseudocelli.

steposa
First thoracic tergum without pseudocelli. Pseudocellar formula per half abdominal tergum 33343. Second and third thoracic tergum with 2 + 2 pseudocelli. Sensory organ of third antennal segment with 5 papillae. Third thoracic tergum with lateral microsensilla.

uralica
First thoracic tergum with 1 + 1 pseudocelli. Pseudocellar formula dorsally: 32/133/44454. Pseudocellar formula ventrally: 2/000/1112. Sensory organ of third antennal segment with 5 papillae. Subcoxae with 2–3–3 pseudocelli.

References