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Abstract
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The Eriophyoidae, also known as the Tetrapodidi or four-legged mites, are worldwide in distribution (Krantz & Walter, 2009). Eriophyoid mites are obligatory plant feeders and are well adapted to living on plants (Lindquist & Oldfield, 1996). Often their infestation and feeding behaviour leads to plant injury that manifests in the form of russeting, gall formation, bronzing, browning, silvering or curling of leaves and deformed or stunted buds (Menon et al., 2014). Family Eriophyidae is one of largest family of Eriophyoidea, with approximately 227 genera and over 3000 known species, of which the genus Aceriacontributes about 25%–30% of worldwide biodiversity. 39% of the reported species of eriophyioid mites in Iran belongs to the genus Aceria(Xue et al., 2009). During 2013-2014, a research project was conducted to study the genus AceriaKeifer, 1944 in Hamedan province. In this concern, leaves of walnut, oleaster, Russian knapweed, European pennyroyal, common lambsquarters and knotgrass, which were infested by eriophyioid mites, were collected and directly mounted in Hoyer’s medium. In total, 6 species were identified, namely: Aceria tristriatus (Nalepa, 1891);Aceria elaeagnicolaFarkas, 1963; Aceria acroptiloni Shevtchenko and Kovalev, 1974; Aceria n. sp.;Aceria chenopodiaXue et al., 2009; Aceria mashhadiensisXue, et al., 2009. Among them Aceria elaeagnicola, Aceria chenopodiaand Aceria tristriatuswere found abundantly and almost with wide distribution in these areas.
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