''Pachypsylla'' is a genus of

psyllids Psyllidae, the jumping plant lice or psyllids, are a family of small plant-feeding insects that tend to be very host-specific, i.e. each plant-louse species only feeds on one plant species (monophagous) or feeds on a few closely related plants ( ...

. Species of the genus ''Pachypsylla'' lay eggs on the leaves of the ''

Celtis occidentalis ''Celtis occidentalis'', commonly known as the common hackberry, is a large deciduous tree native to North America. It is also known as the nettletree, sugarberry, beaverwood, northern hackberry, and American hackberry. It is a moderately long-l ...

'' 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, fungi, or animals. Plant galls are abnormal outgrowths of plant tissues, similar to be ...

which the young leaf parts grow in response to the infestation.

Species

The following species are recognised in the genus ''Pachypsylla'': *''

Pachypsylla celtidisasterisca ''Pachypsylla'' is a genus of 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 ...

'' Riley, 1890 *''

Pachypsylla celtidiscucurbita ''Pachypsylla'' is a genus of 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 ...

'' Riley, 1890 *''

Pachypsylla celtidisgemma ''Pachypsylla'' is a genus of 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 ...

'' Riley, 1885 – hackberry bud gall maker *''

Pachypsylla celtidisglobula ''Pachypsylla'' is a genus of 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 ...

'' Riley, 1890 *''

Pachypsylla celtidisinteneris ''Pachypsylla'' is a genus of 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 ...

'' Mally, 1894 *''

Pachypsylla celtidismamma ''Pachypsylla celtidismamma'', known generally as the hackberry nipplegall maker or hackberry psylla, is a species of plant-parasitic hemipteran in the family Aphalaridae Aphalaridae is a bug family in the superfamily Psylloidea. Description ...

'' (Riley, 1881) – hackberry nipplegall maker *''

Pachypsylla celtidispubescens ''Pachypsylla'' is a genus of 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 ...

'' Riley, 1890 *''

Pachypsylla celtidisumbilicus ''Pachypsylla'' is a genus of 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 ...

'' Riley, 1890 *'' Pachypsylla celtidisvesicula'' Riley, 1890 – hackberry blistergall psyllid *'' Pachypsylla cohabitans'' Yang & Riemann, 2001 *'' Pachypsylla dubia'' Patch, 1912 *''

Pachypsylla pallida ''Pachypsylla'' is a genus of 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 ...

'' Patch, 1912 *''

Pachypsylla tropicala ''Pachypsylla'' is a genus of 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 ...

'' Caldwell, 1944 *''

Pachypsylla venusta ''Pachypsylla'' is a genus of 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 ...

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

Gallery

References

Aphalaridae Psylloidea genera {{Sternorrhyncha-stub