Yang, M.-M. & C. Mitter. 1993. Biosystematics of hackberry psyllids (Pachypsylla) and the evolution of gall and lerp formation in psyllids (Homoptera: Psylloidea): a preliminary report. The Ecology and Evolution of Gall-forming Insects. United States Dept. of Agriculture.

Distribution Data from source:

Pachypsylla celtidismammaCentral USA & CanadaIowa
Pachypsylla celtidismammaCentral USA & CanadaMissouri
Pachypsylla celtidismammaSouthcentral USAArkansas
Pachypsylla celtidismammaSouthcentral USAMississippi
Pachypsylla celtidismammaSoutheastern USALouisiana
Pachypsylla celtidismammaSoutheastern USAMaryland
Pachypsylla celtidismammaSoutheastern USAVirginia
Pachypsylla celtidisvesiculumSouthcentral USATexas
Pachypsylla celtidisvesiculumSoutheastern USAVirginia
Pachypsylla celtidisvesiculumSouthwestern USANew Mexico
Pachypsylla pallidaSouthcentral USAOklahoma

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