Other identification keys


 

ELECTRONIC POLYTOMOUS KEY TO SPECIES OF PHYTOSEIIDAE OF AGRONOMIC IMPORTANCE

 

Tixier M.-S., Vicente dos Santos V., Douin M., Kreiter S.

 

Species considered

Only the valid species, according to the last world catalogue of the family Phytoseiidae (Moraes et al. 2004) were considered. Sixty Phytoseiidae species are included in the key (see table below). They correspond to species used in biological control all over the world on various crops and also to species morphologically very close that could be misidentified. For each of these species, data on their geographical distribution and some aspects of biology (especially in a framework of biological control) are provided in the key.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Characters considered

Setae nomenclature used in the key follows Lindquist and Evans (1965) as adapted by Rowell et al. (1978) for the Phytoseiidae, with modifications for the caudal region as given by Lindquist (1994). Idiosomal solenostome nomenclature follows Athias-Henriot (1975).

Forty-four characters were used to construct the key, eighteen are discrete and twenty-six are continuous. For species present in the Montpellier SupAgro collection, observations were performed with a phase and differential interference contrasts microscope (Leica DMLB, Leica Microsystèmes SAS, Nanterre, France) (40x magnification). For species wich were not present in our collection, original descriptions were used to feel the character database. Pictures were taken to illustrate the key for nearly all the species considered. In a same way information on biology and distribution of each species is provided in the key. At last to make the key easier to use each character is illustrated.

 

How to use the key

The polytomous key was constructed using the software DELTA 1.04 (DEscription Language for TAxonomy) in MS-Windows. DELTA is a modern software package that manages taxonomic research.

The user needs to download this software package for using the key

It can be downloaded for free from the website http://delta-intkey.com (search under: Programs and documentation, Programs, All programs (including Intkey). A complete description of the software and of its advantages is given in Coleman et al. (2010).

When clicking on the following link, the user will download the repertory included the key. Once the repertory unzipped and extracted, the user will access to the key opening the file intkey.ink

 

Click here to access the key

 

 

Contacts. Marie-Stéphane Tixier, tixier@supagro.inra.fr