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

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, Pl-50-335 Wroclaw, Poland
Kenneth A. Christiansen, Department of Biology, Grinnell College, PO Box V3, Grinnell, IA 50112-0806, USA
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). Anterior cephalic pseudocelli located inside the delimited
        antennal basal area (fig.11, 16); pseudocellar formula 20/000
        (1)/000.................................................. eous
      Anterior cephalic pseudocelli located outside the delimited
        antennal basal area (fig.1, 8); pseudocellar formula
        20/011/10022................................................ 2
 
2(1). Body fusiform (fig.25); sense organ of third antennal segment
        with 4 papillae and 5 guard setae........................... 3
      Body squat and broad (fig.1-2); sense organ of third antennal
        segment with 4 papillae and 4 guard setae............. ramosus
 
3(2). Furca enclosed by a group of 28-30 setae located on fourth
        abdominal sternum (fig.30)........................... hubbardi
      Furca without an additional group of setae on fourth abdominal
        sternum (fig.21)....................................... probus

Differential diagnoses

eous
Anterior cephalic pseudocelli located inside the delimited antennal basal area (fig., 16). Pseudocellar formula 20/000 (1)/000.

hubbardi
Anterior cephalic pseudocelli located outside the delimited antennal basal area (fig., 8). Body fusiform (fig.). Furca enclosed by a group of 28–30 setae located on fourth abdominal sternum (fig.). Pseudocellar formula 20/011/10022. Sense organ of third antennal segment with 4 papillae and 5 guard setae.

probus
Anterior cephalic pseudocelli located outside the delimited antennal basal area (fig., 8). Body fusiform (fig.). Furca without an additional group of setae on fourth abdominal sternum (fig.). Pseudocellar formula 20/011/10022. Sense organ of third antennal segment with 4 papillae and 5 guard setae.

ramosus
Anterior cephalic pseudocelli located outside the delimited antennal basal area (fig., 8). Body squat and broad (fig.–2). Pseudocellar formula 20/011/10022. Sense organ of third antennal segment with 4 papillae and 4 guard setae.


References