http://www.collembola.org/key/pseutrus.htm - Last updated on 2009.09.30 by Frans Janssens
Checklist of the Collembola: Key to the species of Pseudodicranocentrus

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.

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). Tibiotarsus with inner rows of smooth setae; unguis tridentate..
         ............................................... christianseni
      Tibiotarsus without smooth setae; unguis quadridentate........ 2
 
2(1). Compound spines on dental lobe absent; differentiated seta of
        outer labial papilla flanked by 2 setae................. niger
      Compound spines on dental lobe present; differentiated seta of
        outer labial papilla not flanked by 2 setae........ circulatus

Differential diagnoses

christianseni
Tibiotarsus with inner rows of smooth setae. Unguis tridentate.

circulatus
Compound spines on dental lobe present. Differentiated seta of outer labial papilla not flanked by 2 setae. Tibiotarsus without smooth setae. Unguis quadridentate.

niger
Compound spines on dental lobe absent. Differentiated seta of outer labial papilla flanked by 2 setae. Tibiotarsus without smooth setae. Unguis quadridentate.

References