During a faunistic survey on eriophyoid mites associated with weeds in Golestan province of Iran, four eriophyoid species were collected. A new species, Aculops hyperisaemum sp. nov., was found on Hypericum androsaemum L. -Hypericaceae- and herein described and illustrated. Paraphytoptus paradoxus Nalepa, 1896, Aceria lamii -Liro, 1943- and Aceria verbenacae de Lillo et al., 2017, were found respectively on Artemisia absinthium L. -Asteraceae-, Lamium album L. and Salvia nemorosa L. -Lamiaceae- and are reported for the first time in Iran. Aculops hyperisaemum sp. nov. and A. lamii were vagrant on the underside of the leaves of their host plants and no symptoms were detected. Aceria lamii is redescribed using modern microscopy and terminology. Paraphytoptus paradoxus was vagrant on the leaf underside and caused discoloration of the leaves; this is the first record of Paraphytoptus from Iran. Aceria verbenacae induced erinea on leaves, petioles, stems and flowers on a new host plant species.

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