Eriophyoid (Acari: Eriophyoidea) mite fauna of Hesar village in Meshginshahr region with description of a new species

To identify eriophyoid mites, sampling was done on dominant plants of Hesar village in Meshginshahr region of the Ardabil province during summer 2020. Two families, five subfamilies, five tribes, 12 genera and 27 species were identified among which Cecidophyopsis hesariensis Lotfollahi & Hemmatzadeh sp. nov. collected on the host plant Lonicera iberica M. Bieb. (Caprifoliaceae) was new to science and the second Cecidophyopsis species found on plants of the family Caprifoliaceae. Three species including Aculus salicisincanae (Nalepa, 1925), Aceria peucedani (Canestrini, 1892) and Aculus eurynotus (Nalepa, 1894) were new reports for Iran. A list of identified taxa is provided with comments and 22 species were reported for the first time in Ardabil province.