Aceria pterocaryae Kuang & Gong, 1996
the tufts of hair in the vein axils (acarodomatia) are enlarged and deepened.
Juglandaceae, (narrowly?) monophagous
In a botanical garden to a lesser degree also on Pt. x rehderiana, but not on fraxinifolia or rhoifolia Groom (2011a).
Found in the UK in 2006. Apparently not yet recorded from Pterocarya fraxinifolia, that is planted much more often.
Groom (2011a), Redfern & Shirley (2011a), Xue, Sadeghi & Hong (2009a).