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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: 18671
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: 3474
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: 3459
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: 3689
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: 3474
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: 3662
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: 16427
Key Author(s): Dr David Evans Walter & Dr Heather Proctor Key Version: 1.0
Diatom Identification Key for South African Rivers V2.0

A key to the common and some endemic species of diatoms occurring in South African rivers. Use of the key may be constrained by the absence of endemic species from the Western Cape and KwaZulu Natal provinces.

DH Environmental Consulting
PO Box 5429
Helderberg 7135
SOUTH AFRICA

Posted By: Site Admin Last Updated: May 9, 2011 Views: 4209
Key Author(s): Hardng, WR & Taylor, JC. Key Version: 2.0
Key to the Flowering Plant Familes of the Neotropics

Neotropikey is an international project based at the Royal Botanic Gardens, Kew, developing identification resources for the flowering plants of the Neotropical region (tropical South and Central America).

Posted By: Site Admin Last Updated: Apr 13, 2011 Views: 4325
Key Author(s): Kew Gardens Key Publisher: Kew Gardens Key Version: 1.0
Orders, Suborders & Cohorts of Mites in Soil

The taxonomy of mites is in a state of flux.  About two dozen major taxa of mites living in soil are currently recognised and variously designated as superorders, orders, suborders (cohorts) or infraorders.  This key allows identification of these groups and also can be used by beginners for determining which of the more advanced family keys are appropriate.

Posted By: Site Admin Last Updated: Dec 1, 2010 Views: 4660
Key Author(s): David Evans Walter & Heather C. Proctor Key Version: 1
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