Pachypsylla
Pachypsylla is a genus of North American psyllids. Species of the genus Pachypsylla lay eggs on the leaves of the Celtis occidentalis tree. Upon hatching, the young psyllids become encased in a gall which the young leaf parts grow in response to the infestation.
Species
The following species are recognised in the genus Pachypsylla:- Pachypsylla celtidisasterisca Riley, 1890
- Pachypsylla celtidiscucurbita Riley, 1890
- Pachypsylla celtidisgemma Riley, 1885 – hackberry bud gall maker
- Pachypsylla celtidisglobula Riley, 1890
- Pachypsylla celtidisinteneris Mally, 1894
- Pachypsylla celtidismamma – hackberry nipplegall maker
- Pachypsylla celtidispubescens Riley, 1890
- Pachypsylla celtidisumbilicus Riley, 1890
- Pachypsylla celtidisvesicula Riley, 1890 – hackberry blistergall psyllid
- Pachypsylla cohabitans Yang & Riemann, 2001
- Pachypsylla dubia Patch, 1912
- Pachypsylla pallida Patch, 1912
- Pachypsylla tropicala Caldwell, 1944
- Pachypsylla venusta – petiolegall psyllid