http://www.collembola.org/key/sturmius.htm - Last updated on 2011.07.01 by Frans Janssens
Checklist of the Collembola: Key to the species of Sturmius

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). Dorsal spines of great abdomen not short and blunt; empodium of
        third leg extending beyond apex of unguis; third unguis
        slender, with small inner tooth............................. 2
      Dorsal spines of great abdomen short and blunt; empodium of
        third leg not extending beyond apex of unguis; third unguis
        broad, with distinct inner tooth and toothed pseudonychium....
         ................................................. truncivivus
 
2(1). Anal appendage as thick as setae sa3 of small abdomen; dorsal
        spines of great abdomen slender and short, not flame-shaped;
        unguis with toothed pseudonychium................... epiphytus
      Anal appendage thicker than setae sa3 of small abdomen; dorsal
        spines of great abdomen flame-shaped; unguis without
        pseudonychium..................................... panamaensis

Differential diagnoses

epiphytus
Anal appendage as thick as setae sa3 of small abdomen. Dorsal spines of great abdomen not short and blunt. Dorsal spines of great abdomen slender and short, not flame-shaped. Empodium of third leg extending beyond apex of unguis. Third unguis slender, with small inner tooth. Unguis with toothed pseudonychium.

panamaensis
Anal appendage thicker than setae sa3 of small abdomen. Dorsal spines of great abdomen not short and blunt. Dorsal spines of great abdomen flame-shaped. Empodium of third leg extending beyond apex of unguis. Third unguis slender, with small inner tooth. Unguis without pseudonychium.

truncivivus
Dorsal spines of great abdomen short and blunt. Empodium of third leg not extending beyond apex of unguis. Third unguis broad, with distinct inner tooth and toothed pseudonychium.


References