http://www.collembola.org/key/entomdae.htm - Last updated on 2009.09.30 by Frans Janssens
Checklist of the Collembola: Key to the subfamilies of Entomobryidae

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.

Felipe N. Soto-Adames, Illinois Natural History Survey, IL 61820, Champaign, USA
Jean-Auguste Barra, Université Louis Pasteur, Laboratoire de Zoologie, F-67000 Strasbourg, France
Kenneth A. Christiansen, Department of Biology, Grinnell College, PO Box V3, Grinnell, IA 50112-0806, USA
Rafael Jordana, Department of Zoology and Ecology, University of Navarra, 31080 Pamplona, Spain
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). Trochanteral organ with 3-4 setae and 5-6 antennal segments, or
        trochanteral organ with more then 3-4 setae................. 2
      Trochanteral organ with 3-4 setae and four antennal segments
        (fig.1)........................................... Capbryinae

Fig.1.
   
2(1). Ratio abdominal segments 3/4 at midline less then 1.8...........
         ............................................... Orchesellinae
      Ratio abdominal segments 3/4 at midline more then 2........... 3
 

3(2). Ventral face of dens with scales.............................. 4
      Ventral face of dens without scales 1........................... 5
 

4(3). Scales ribless finely denticulate, apically rounded (fig.2)....
         .............................................. Lepidocyrtinae
      Scales with coarse ribs or denticles some pointed (fig.3)......
         .................................................... Seirinae

Fig.2.
  

Fig.3.
   
5(3). Body with scales (fig.3).......................... Willowsiinae
      Body without scales............................... Entomobryinae

Endnotes

1 According to Yoshii (1989), Lepidosinella lacks ventral dental scales and will key out to Willowsiinae; however, this genus is placed in Seirinae because Yoshii indicates that in scale and mucro morphology, and in general body shape Lepidosinella most closely resembles Seira.

2 For convenience, in this checklist, the tribes of Entomobryinae: Entomobryini, Lepidocyrtini, Seirini and Willowsiini are maintained at subfamily level.

Differential diagnoses

Capbryinae
Trochanteral organ with 3–4 setae and four antennal segments (fig.1).

Entomobryinae
Body without scales. Ratio abdominal segments 3/4 at midline more then 2. Trochanteral organ with 3–4 setae and 5–6 antennal segments, or trochanteral organ with more then 3–4 setae. Ventral face of dens without scales$note1.

Lepidocyrtinae
Ratio abdominal segments 3/4 at midline more then fig.. Scales ribless finely denticulate, apically rounded (fig.2). Trochanteral organ with 3–4 setae and 5–6 antennal segments, or trochanteral organ with more then 3–4 setae. Ventral face of dens with scales.

Orchesellinae
Ratio abdominal segments 3/4 at midline less then 1.8. Trochanteral organ with 3–4 setae and 5–6 antennal segments, or trochanteral organ with more then 3–4 setae.

Seirinae
Ratio abdominal segments 3/4 at midline more then 2. Scales with coarse ribs or denticles some pointed (fig.3). Trochanteral organ with 3–4 setae and 5–6 antennal segments, or trochanteral organ with more then 3–4 setae. Ventral face of dens with scales.

Willowsiinae
Body with scales (fig.3). Ratio abdominal segments 3/4 at midline more then 2. Trochanteral organ with 3–4 setae and 5–6 antennal segments, or trochanteral organ with more then 3–4 setae. Ventral face of dens without scales$note1.

References