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Biodiversity and Conservation

, Volume 21, Issue 4, pp 993–1013 | Cite as

Rates of description of Phytoseiidae mite species (Acari: Mesostigmata): space, time and body size variations

  • M.-S. Tixier
  • S. Kreiter
  • M. Douin
  • G. J. Moraes
Original Paper

Abstract

This study aims to analyse the degree of completeness of world inventory of the mite family Phytoseiidae and the factors that might determine the process of species description. The world data set includes 2,122 valid species described from 1839 to 2010. Species accumulation curves were analysed. The effect of localisation (latitude ranges) and body size on the species description patterns over space and time was assessed. A low proportion of species seems remain to be described, but this trend could be explained by a critical reduction in the number of specialists dedicated to the study of those mites. In addition, this trend refers to the areas where phytoseiids have been well studied around the world, and it may change considerably if the study of these mites would be intensified in some areas. The number of newly described species is lower near the tropics, and their body size is also smaller. Differences in body size were noted between the three sub-families of Phytoseiidae, the highest mean body lengths of adult females being observed for Amblyseiinae, the most diverse family. In the future, collections would have certainly to take into consideration such conclusions for instance in using more adequate optical equipment especially for field collections. The decrease in the number of phytoseiid mite described was confirmed and the factors that could explain such a trend are discussed. Information for improving further inventories is provided and discussed, especially in relation to sampling localization and study methods.

Keywords

Time accumulation curves Biodiversity Predatory mite Taxonomy Latitude range Size 

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • M.-S. Tixier
    • 1
  • S. Kreiter
    • 1
  • M. Douin
    • 1
  • G. J. Moraes
    • 2
  1. 1.Montpellier SupAgro, UMR CBGP (INRA/IRD/CIRAD/SupAgro)Montferrier sur Lez cedexFrance
  2. 2.Departamento de Entomologia e AcarologiaESALQ, University of Sao PauloPiracicabaBrazil

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