''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 Galls (from the Latin , 'oak-apple') or ''cecidia'' (from the Greek , anything gushing out) are a kind of swelling growth on the external tissues of plants. Plant galls are abnormal outgrowths of plant tissues, similar to benign tumors or war ...

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'' (Riley, 1881) – 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'' (Osten-Sacken, 1861) – petiolegall psyllid

Gallery

References

Aphalaridae Psylloidea genera {{Sternorrhyncha-stub