The eriophyid mite aculops Ailanthi Lin, Jin, & Kuang, 1997 (Acariformes: Prostigmata: Eriophyidae) from tree­of­heaven in the United States-new state records and morphological observations

We report Aculops ailanthi Lin, Jin, & Kuang, 1997 (Acariformes: Trombidiformes: Prostigmata: Eriophyidae) from Pennsylvania and West Virginia, USA; present the first scanning electron micrographs of the species in North America and discuss morphological observations that clarify features observed in slide­mounted specimens, such as the number ridges on female genital flaps; and briefly discuss symptoms and control of an A. ailanthi infestation on greenhouse­grown tree­of­heaven, Ailanthus altissima (Mill.) Swingle (Sapindales: Simaroubaceae).