http://www.collembola.org/key/blasella.htm - Last updated on 2014.04.30 by Frans Janssens
Checklist of the Collembola: Key to the species of Blasconurella

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). Dorso-external tubercle of fourth abdominal segment with 1 + s
        setae....................................................... 2
      Dorso-external tubercle of fourth abdominal segment with 2 + s
        setae....................................................... 3
 
2(1). Dorso-external tubercle of first to third abdominal segment with
        2 + s setae; macrochaeta de1 absent................... arcuata
      Dorso-external tubercle of first to third abdominal segment with
        3 + s setae; macrochaeta de1 present............... intermedia
 
3(1). Dorsal tubercle on head with 2 setae; dorsal macrochaeta greatly
        enlarged at the apex.................................. palmata
      Dorsal tubercle on head with 5 setae; dorsal macrochaeta not
        enlarged at the apex........................................ 4
 
4(3). Dorso-external tubercle of first to third abdominal segment with
        2 + s setae; dorsal tubercle on head with 2 macrochaetae;
        macrochaeta de1 absent................................. lobata
      Dorso-external tubercle of first to third abdominal segment with
        3 + s setae; dorsal tubercle on head with 3 macrochaetae;
        macrochaeta de1 present......................... quinquesetosa

Differential diagnoses

arcuata
Dorso-external tubercle of first to third abdominal segment with 2 + s setae. Dorso-external tubercle of fourth abdominal segment with 1 + s setae. Macrochaeta de1 absent.

intermedia
Dorso-external tubercle of first to third abdominal segment with 3 + s setae. Dorso-external tubercle of fourth abdominal segment with 1 + s setae. Macrochaeta de1 present.

lobata
Dorsal macrochaeta not enlarged at the apex. Dorsal tubercle on head with 5 setae. Dorsal tubercle on head with 2 macrochaetae. Dorso-external tubercle of first to third abdominal segment with 2 + s setae. Dorso-external tubercle of fourth abdominal segment with 2 + s setae. Macrochaeta de1 absent.

palmata
Dorsal macrochaeta greatly enlarged at the apex. Dorsal tubercle on head with 2 setae. Dorso-external tubercle of fourth abdominal segment with 2 + s setae.

quinquesetosa
Dorsal macrochaeta not enlarged at the apex. Dorsal tubercle on head with 5 setae. Dorsal tubercle on head with 3 macrochaetae. Dorso-external tubercle of first to third abdominal segment with 3 + s setae. Dorso-external tubercle of fourth abdominal segment with 2 + s setae. Macrochaeta de1 present.

References