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

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.

Rafael Jordana, Department of Zoology and Ecology, University of Navarra, 31080, Pamplona, Navarra, Spain
Enrique Baquero, Department of Zoology and Ecology, University of Navarra, 31080, Pamplona, Navarra, 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). Fifth antennal segment with bilobed apical papilla............ 2
      Fifth antennal segment without apical papilla................. 6
 
2(1). Body color blue-violet........................................ 3
      Body color green........................................ viridis
 
3(2). Tenaculum with one seta....................................... 4
      Tenaculum with two setae............................. szeptyckii
 
4(3). Pin seta on fifth antennal segment bifurcate............. boraoi
      Pin seta on fifth antennal segment pointed.................... 5
 
5(4). Non annulated dens/mucro ratio 4; coxae without pigment.........
         .................................................. kabulensis
      Non annulated dens/mucro ratio 6; coxae with pigment....... poli
 
6(1). Head with trichobothrium...................................... 7
      Head without trichobothrium............................ sinensis
 
7(6). Pin seta on fifth antennal segment bifurcate; unguicular outer
        tooth at about forty percent from its base.......... carolinae
      Pin seta on fifth antennal segment trifurcate; unguicular outer
        tooth distal, above fifty percent from its base...... lineatus

Endnotes

1. Orchesellides crassa (Imms, 1912) was described as Entomobrya crassa probably by an inaccurate observation of the antennal segments (Bonet, 1930). This species has not been considered in the present key because the original description is insufficient for diagnosis and because the authors were unable to examine the holotype.

Differential diagnoses

boraoi
Body color blue-violet. Fifth antennal segment with bilobed apical papilla. Pin seta on fifth antennal segment bifurcate. Tenaculum with one seta.

carolinae
Fifth antennal segment without apical papilla. Head with trichobothrium. Pin seta on fifth antennal segment bifurcate. Unguicular outer tooth at about forty percent from its base.

kabulensis
Body color blue-violet. Coxae without pigment. Fifth antennal segment with bilobed apical papilla. Non annulated dens/mucro ratio 4. Pin seta on fifth antennal segment pointed. Tenaculum with one seta.

lineatus
Fifth antennal segment without apical papilla. Head with trichobothrium. Pin seta on fifth antennal segment trifurcate. Unguicular outer tooth distal, above fifty percent from its base.

poli
Body color blue-violet. Coxae with pigment. Fifth antennal segment with bilobed apical papilla. Non annulated dens/mucro ratio 6. Pin seta on fifth antennal segment pointed. Tenaculum with one seta.

sinensis
Fifth antennal segment without apical papilla. Head without trichobothrium.

szeptyckii
Body color blue-violet. Fifth antennal segment with bilobed apical papilla. Tenaculum with two setae.

viridis
Body color green. Fifth antennal segment with bilobed apical papilla.

References