Pachypsylla celtidisvesicula
Pachypsylla celtidisvesicula, commonly called the hackberry blistergall psyllid, is a species of aphalarid psyllid found in North America. The nymphs of this species induce blister-like galls on the leaves of various hackberries throughout its range.
It closely related to the more common hackberry nipplegall psyllid, which it strongly resembles as an adult.