![]() ![]() By enabling non-experts to carry out basic identifications, it is hoped that professionals in the health and agricultural industries in New Zealand can play a greater role in surveillance for exotic ticks. Wings held flat at rest mouthparts adapted for piercing and sucking Hemiptera Wings held roof-wise over body at rest biting mouthparts Neuroptera 16. Each alternative choice then leads to another pair of clues and then another, until the items are identified. Each step in the key provides two contrasting choices about a characteristic. The word dichotomous is derived from the Greek words meaning two parts. With each sequential division, more information is revealed about the specific features of a particular organism. A dichotomous key is a method of identification whereby groups of organisms are divided into two categories repeatedly. Tiny insects covered with white powder Go to 15 Insects not like this Go to 16 15. Dichotomous keys are useful for biological classification as well as identification. Skill: Construction of dichotomous keys for use in identifying specimens. These keys have been digitised using Lucid® and Phoenix® software and are deployed at genera.html in a form that allows use by non-experts. Dichotomous Key to Insect Orders (Adult specimens) modified for grasping 14. This article presents dichotomous and polytomous keys to the eight species of hard tick that occur in New Zealand. Europe PMC is an archive of life sciences journal literature. Dichotomous keys are also used for identifying and classifying new species. A key gives pairs of either-or choices that direct the user to the next pair of choices (also known as a couplet) or to the point of identification. This is of concern as 40-60% of exotic ticks submitted for identification by biosecurity staff in New Zealand are intercepted post border. Dichotomous keys are used to identify a variety of things including insects, plants, animals and rocks. The lack of access to these materials has the potential to lead to delays in the identification of exotic tick species. However, professionals in the biosecurity, health and agricultural industries in New Zealand have little access to user-friendly identification tools that would enable them to accurately identify the ticks that are already established in the country or to allow recognition of newly arrived exotics. Although exotic hard ticks (Ixodidae) are intercepted in New Zealand on a regular basis, the country has largely remained free of these organisms and the significant diseases that they can vector. New Zealand has a relatively small tick fauna, with nine described and one undescribed species belonging to the genera Ornithodoros, Amblyomma, Haemaphysalis and Ixodes. So, a dichotomous key gives you two choices at each step to describe something. The word dichotomous (pronounced die-cot-o-mus) means divided into two parts and a key refers to a series of questions that help you to identify something. ![]() Ixodidae, dichotomous, polytomous, Lucid®, Phoenix®, biosecurity, New Zealand Abstract dichotomous key is a specific type of scientific key. ![]()
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