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Soil Microarthropods

This is a key to the major lineages (Classes and Orders) of soil-inhabiting microarthropods. For our purposes this means that arthropods < 1 cm in length as adults are included.

Posted By: Site Admin Last Updated: Jun 1, 2011 Views: 12279
Key Author(s): David Walter and Heather Proctor Key Publisher: The University of Queensland Key Version: v1.0
An interactive identification tool to identify the genera of Tetranychinae of most interest to quarantine

This key allows identification of the genera of Tetranychinae of most interest to quarantine.

Posted By: Site Admin Last Updated: May 13, 2011 Views: 8444
Key Author(s): Dr David Evans Walter Key Version: 1.0
An interactive identification tool to identify adult females of Stratiolaelaps

This is a key to adult females of described species of Stratiolaelaps compiled by Dr David Evans Walter of Colorado State University and the University of Alberta.

Posted By: Site Admin Last Updated: May 13, 2011 Views: 9396
Key Author(s): Dr David Evans Walter Key Version: 1.0
Interactive identification tool to identify the plant-parasitic mites (Acari) of most interest to quarantine

This key allows separation of the plant-parasitic mite families of most interest to quarantine.

Posted By: Site Admin Last Updated: May 13, 2011 Views: 19763
Key Author(s): Dr David Evans Walter Key Version: 1.0
Key to Species of Phytoseiulus (females)

An interactive identification tool to identify adult females of Phytoseiulus

Posted By: Site Admin Last Updated: May 13, 2011 Views: 4357
Key Author(s): Dr David Evans Walter Key Version: 1.0
Mesostigmata (Monogynaspida) in Quarantine

This is a key to mesostigmatic mites likely to be found in quarantine intercepts compiled by Dr David Evans Walter of Colorado State University and the University of Alberta (dew@ualberta.ca).

About one-quarter of all mite species belong to the Mesostigmata, including many economically important pests (e.g. varroa mite of bees, fowl mites, rat mites) and even more economically useful biocontrol agents (especially in the families Phytoseiidae, Laelapidae and Macrochelidae).  Because of their pervasiveness, mesostigmatans are commonly found in quarantine inspections, but primarily because few are plant parasites, there are few taxonomic specialists to help in their identification.  This key is designed to support the identification of members of the largest suborder of Mesostigmata, the Monogynaspida (See the key Major Mite Taxa to identify Mesostigmata to suborder).  Monogynaspids are the mesostigmatans most likely to be found in a quarantine intercept and the Monogynaspida contains all of the economically important species.

Posted By: Site Admin Last Updated: May 13, 2011 Views: 4344
Key Author(s): Dr David Evans Walter Key Version: 1.0
Key to Major Mite Taxa

This key allows identification of the acarine orders Opilioacarida, Holothyrida, and Ixodida.  Additionally keyed are: all 3 suborders of Mesostigmata (Sejida, Trigynaspida, Monogynaspida); the sarcoptiform suborder Endeostigmata; 4 supercohorts, 3 cohorts, and one specialized dispersal stage (the astigmatan hypopus) of Oribatida (including the brachypyline oribatid mites and the former suborder Astigmata); the trombidiform suborder Sphaerolichida; and 3 supercohorts and 2 cohorts of Prostigmata.

Posted By: Site Admin Last Updated: May 13, 2011 Views: 4533
Key Author(s): Dr David Evans Walter Key Version: 1.0
Is it a Mite?

Mites are so small, morphologically diverse, and often bizarrely modified, that even specialists occasionally made an incorrect first diagnosis.  There is even a case in the literature of a mite having been misdescribed as a new species of spider.  

This key is provided in the hopes that if a suspicious looking tiny arthropod is encountered in an inspection, it can quickly be determined if it is a mite.  A second, objective of this key is to begin introducing and explaining the terminology that will be used in my other mites keys.  Terms are explained in the character state notes and images and in a separate glossary. 

Posted By: Site Admin Last Updated: May 13, 2011 Views: 4335
Key Author(s): Dr David Evans Walter Key Version: 1.0
Key to Genera of Bryobiinae (females)

 This key allows identification of the genera of Bryobiinae of most interest to quarantine.

Posted By: Site Admin Last Updated: May 13, 2011 Views: 4524
Key Author(s): Dr David Evans Walter Key Version: 1.0
A Key to the Genera of Endeostigmata and Sphaerolichida

This is a key to the genera of primitive acariform mite groups Endeostigmata and Sphaerolichida written and compiled by Dr David Evans Walter of Colorado State University and the University of Alberta with the assistance of Dr Heather Proctor of the University of Alberta.

Endeostigmatans are common in many habitats, but seem to reach their highest abundances in extreme habitats such as deserts, beaches, and polar regions. As far as is known, these mites are fungivores, algivores and predators on small invertebrates such as nematodes, tardigrades, and mites.  None are considered economically important pests.  They are most likely to be intercepted in goods containing soil, especially dry soils including sand, lichens, mosses or other materials associated with dry or otherwise extreme habitats, including anthropogenic accumulations of dust.

Posted By: Site Admin Last Updated: May 13, 2011 Views: 17474
Key Author(s): Dr David Evans Walter & Dr Heather Proctor Key Version: 1.0
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