Psylloidea

Psylloidea; Temporal range: Early Jurassic–Recent PreꞒ Ꞓ O S D C P T J K Pg N
	Psylla alni
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hemiptera
Suborder:	Sternorrhyncha
Superfamily:	Psylloidea; Latreille, 1807
Families
	See text

Psylloidea^[1] is a superfamily of true bugs, including the jumping plant lice and others which have recently been classified as distinct families. Though the group first appeared during the Early Jurassic, modern members of the group do not appear until the Eocene, and Mesozoic members of the order are usually assigned to the possibly paraphyletic family Liadopsyllidae.^[2]

Families

In addition, the following extinct families are recognised:

Economic importance

Some psylloids are economically important pests:^[3]

Diaphorina citri (Liviidae), the asiatic citrus psyllid is native to southern Asia; it has spread to most citrus-growing regions. It is a vector of Liberobacter asiaticum, the bacterial greening disease.
Trioza erytreae (Triozidae), the African citrus psyllid is a pest of citrus and some other Rutaceae. Like Diaphorina citri it is a vector of "greening disease". The psyllid is primarily an Afrotropical pest.
Trioza perseae (Triozidae), the avocado psyllid forms galls on the leaves of avocado, Persea americana. Other psyllid pests of avocado include Trioza anceps, Trioza aguacate and Trioza godoyae
Trioza apicalis (Triozidae), the carrot psyllid is an important pest of the cultivated carrot, Daucus carota (Apiaceae).
Bactericera cockerelli (syn. Paratrioza cockerelli) (Triozidae), the potato psyllid feeds on potatoes and tomatoes (Solanaceae); sporadic infestations have occurred in potato-growing areas of the USA, causing symptoms knows as "potato yellows".