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

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.

Javier I. Arbea, Departamento de Biología, Instituto de Enseñanza Secundaria Foramontanos, 39500, Cantabria, España
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).   Body colour blue; eye cluster with more then 2 ocelli;
          postantennal organ with 4-5 tubercles..................... 2
        Body colour white; eye cluster with 2 ocelli; postantennal
          organ with 6-7 tubercles............................ serrata
 
2(1).   Eye cluster with 5 ocelli................................... 3
        Eye cluster with 8 ocelli................................... 6
 
3(2).   Tibiotarsus with 4 espolones mazudos............... fueguensis
        Tibiotarsus without espolones mazudos....................... 4
 
4(3).   Dorsal macrosetae acuminate or d‚bilmente mazudas........... 5
        Dorsal macrosetae distinctly clavate.................. clavata
 
5(4).   Claw with internal tooth; dorsal macrosetae acuminate.........
           .................................................. steineni
        Claw without internal tooth; dorsal macrosetae ligeramente
          mazudas........................................ decemoculata
 
6(2).   Tibiotarsus with 1 espolon mazudo................... granulata
        Tibiotarsus with more then 1 espolon mazudo................. 7
 
7(6).   Tibiotarsus with 2-3 espolones mazudos...................... 8
        Tibiotarsus with 4-5 espolones mazudos..................... 10
 
8(7).   Dorsal macrosetae acuminate.......................... afurcata
        Dorsal macrosetae clavate................................... 9
 
9(8).   Fourth antennal segment with simple apical vesicle............
           .............................................. occidentalis
        Fourth antennal segment with trilobed apical vesicle.. kanalua
 
10(7).  Fourth antennal segment with simple apical vesicle............
           .............................................. tetrabrachta
        Fourth antennal segment with trilobed apical vesicle....... 11
 
11(10). Body colour blue; maxilla with 7 teeth................. rosasi
        Body colour parda; maxilla with 5 teeth.............. capitata

Differential diagnoses

afurcata
Body colour blue. Dorsal macrosetae acuminate. Eye cluster with more then 2 ocelli. Eye cluster with 8 ocelli. Postantennal organ with 4–5 tubercles. Tibiotarsus with more then 1 espolon mazudo. Tibiotarsus with 2–3 espolones mazudos.

capitata
Body colour parda. Body colour blue. Eye cluster with more then 2 ocelli. Eye cluster with 8 ocelli. Fourth antennal segment with trilobed apical vesicle. Maxilla with 5 teeth. Postantennal organ with 4–5 tubercles. Tibiotarsus with more then 1 espolon mazudo. Tibiotarsus with 4–5 espolones mazudos.

clavata
Body colour blue. Dorsal macrosetae distinctly clavate. Eye cluster with more then 2 ocelli. Eye cluster with 5 ocelli. Postantennal organ with 4–5 tubercles. Tibiotarsus without espolones mazudos.

decemoculata
Body colour blue. Claw without internal tooth. Dorsal macrosetae acuminate or d‚bilmente mazudas. Dorsal macrosetae ligeramente mazudas. Eye cluster with more then 2 ocelli. Eye cluster with 5 ocelli. Postantennal organ with 4–5 tubercles. Tibiotarsus without espolones mazudos.

fueguensis
Body colour blue. Eye cluster with more then 2 ocelli. Eye cluster with 5 ocelli. Postantennal organ with 4–5 tubercles. Tibiotarsus with 4 espolones mazudos.

granulata
Body colour blue. Eye cluster with more then 2 ocelli. Eye cluster with 8 ocelli. Postantennal organ with 4–5 tubercles. Tibiotarsus with 1 espolon mazudo.

kanalua
Body colour blue. Dorsal macrosetae clavate. Eye cluster with more then 2 ocelli. Eye cluster with 8 ocelli. Fourth antennal segment with trilobed apical vesicle. Postantennal organ with 4–5 tubercles. Tibiotarsus with more then 1 espolon mazudo. Tibiotarsus with 2–3 espolones mazudos.

occidentalis
Body colour blue. Dorsal macrosetae clavate. Eye cluster with more then 2 ocelli. Eye cluster with 8 ocelli. Fourth antennal segment with simple apical vesicle. Postantennal organ with 4–5 tubercles. Tibiotarsus with more then 1 espolon mazudo. Tibiotarsus with 2–3 espolones mazudos.

rosasi
Body colour blue. Body colour blue. Eye cluster with more then 2 ocelli. Eye cluster with 8 ocelli. Fourth antennal segment with trilobed apical vesicle. Maxilla with 7 teeth. Postantennal organ with 4–5 tubercles. Tibiotarsus with more then 1 espolon mazudo. Tibiotarsus with 4–5 espolones mazudos.

serrata
Body colour white. Eye cluster with 2 ocelli. Postantennal organ with 6–7 tubercles.

steineni
Body colour blue. Claw with internal tooth. Dorsal macrosetae acuminate or d‚bilmente mazudas. Dorsal macrosetae acuminate. Eye cluster with more then 2 ocelli. Eye cluster with 5 ocelli. Postantennal organ with 4–5 tubercles. Tibiotarsus without espolones mazudos.

tetrabrachta
Body colour blue. Eye cluster with more then 2 ocelli. Eye cluster with 8 ocelli. Fourth antennal segment with simple apical vesicle. Postantennal organ with 4–5 tubercles. Tibiotarsus with more then 1 espolon mazudo. Tibiotarsus with 4–5 espolones mazudos.

References