|Checklist of the Collembola: Keys to the species of Pseudosinella Schäffer, 1897|
Kenneth A. Christiansen,
Department of Biology, Grinell College, PO Box V3, Grinell, IA 50112-0806, USA
Frans Janssens, Department of Biology, University of Antwerp (RUCA), Antwerp, B-2020, Belgium
"Go Online" allowed to interactively identify any species.
N.B. Entering "FINI" at any time returned to the main menu.
In 1999, the VAX system that provided for the original inter-active key was put out of service. The interactive version of the key is now provided through NaviKey. In order to use the new interactive version of the key to the species of Pseudosinella you have to contact the www.wEB page at: http://www.math.grin.edu/~twitchew/coll/. The menu this offers will present you with several options. The Pseudosinella program includes Examine the Species ; View the Delta Database files for Pseudosinella; and Computer Assisted Identification of specimens.
To show an abbreviated description of any species click on Display Individual Pseudosinella species. Pull down menu will be exposed and scroll down the menu to the desired species . Click on this and then click on display Taxon The characters will be listed and the state present in that species shown under it. If you have questions concerning these features turn to the illustrations and listings of the features shown on pages 239-243 of Christiansen, Bellinger & da Gama (1990). If you wish to see a listing of the characters and the character states click on Character File. If you wish to find the character states present for a particular species click on Items file and either scroll down until the species is reached or use a find and type out the species name with a / mark at the end. You can also use the find to locate all species with a particular character state. For example to find all with Character state 2 for character 32 use find 32,2 and the find again until all the species have been covered.
The interactive species identification presently only works with Internet Explorer 4.5 on the Mac and Netscape 4.0+ on the Windows platform. If one of these is available open the box and then click on the characters of the species at hand in the upper left hand box . The species having this character state will be displayed until only one or no species are presented in the lower right hand box. Continue adding features until only one species or no species are left in the box. Presenting the characters in differing order will be useful in showing relationships between your species and others.
The inter-active key for Pseudosinella offers more than the conventional dichotomous key: such as a list of all species, descriptions of the species, a list of all used characters, etc.
Some species apear more then once in the key due to the unavailability of character state data :
aggtelekiensis 3 times binoculata 2 encrusae 2 fallax 2 goughi 2 handschini 8 imparipunctata 2 joupani 3 lleidensis 2 marteli 7 passauri 3 picta 2 propinqua 3 stachi 8 styriaca 2 subduodecima 4 subilliciens 10 tarraconensis longicorni 3
This conventional Pseudosinella key only affords a key to the species. Due to the hyperlink capabilities of HTML, it is possible to move smoothly through the tree. By clicking on the key reference numbers of choice you will be positioned automagically at the next character state selection list in the key.
All the DELTA input files required to generate the key are packed into an archive, and with the kind permission of Dr Christiansen, this archive file can be downloaded here.
Check the original paper of Christiansen et al. (1990) for a detailed description of the characters and character states that are used in this key. A copy of the original paper showing illustrations of the various taxonomical characters used in the key may be obtained from Kenneth Christiansen.