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For the United States & Canada
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Family Aphalaridae

Psyllid - Craspedolepta Psylloidea, unknown - Craspedolepta nebulosa Psyllid - Aphalara rose gum psyllid - Ctenarytaina spatulata - male Psyllid on Lophostemon confertus - Ctenarytaina longicauda Yaupon leaf gall - Gyropsylla ilecis Psyllid - Aphalara Craspedolepta caudata - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Sternorrhyncha (Plant-parasitic Hemipterans)
Superfamily Psylloidea
Family Aphalaridae
Explanation of Names
Aphalaridae Löw, 1879
~77 spp. in 13 genera of 4 subfamilies in our area(1), ~600 spp. in 65 genera of 5 subfamilies worldwide(2)
Adult metatibia with an open crown of sclerotised apical spurs (3)

Overview of Subfamilies:
Aphalarinae: Over 50 spp., occurring most commonly on Asteraceae and Poloygonaceae. Genal cones absent, pterostigma usually absent (present in 2 spp.). Widespread (4)

Spondyliaspidinae: 8 spp., occurring on Eucalyptus or other Myrtaceae, with some species creating conspicuous lerps. Adults often stand and walk on their basitarsi, holding the apical tarsi aloft . Genal cones present, pterostigma present. California and Florida (5)

Pachypsyllinae: >10 spp., occurring on Hackberry (Celtis), usually forming conspicuous galls. Wings often maculate with marginal cells elongate, pterostigma present. Genal cones present, about one-third as long as vertex. Widespread (6)(7)(8)

Rhinocolinae: 1 species, occurring on Evergreen Sumac (Rhus virens). Wings small, rhomboidal, thickened, opaque, with scattered brown spots throughout. Genal cones absent, pterostigma absent. Southern Arizona and Texas. (not pictured)
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Ouvrard D. (2013) Psyl'list - The World Psylloidea Database
3.A revised classification of the jumping plant-lice (Hemiptera: Psylloidea)
Burckhardt D. & Ouvrard D. 2012. Zootaxa 3509: 1-34.
4.Phylogenetic relationships within the subfamily Aphalarinae including a revision of Limataphalara
Burckhardt D. & Queiroz D. L. 2013. Acta Musei Moraviae, Scientiae biologicae 98(2): 35-56.
5.Boreioglycaspis and spondyliaspidine classification (Homoptera: Psylloidea)
Burckhardt D. 1990. Raffles Bulletin of Zoology, 39, 15–52.
6.The Authority and Types for the Hackberry Gall Psyllid Genus Pachypsylla (Riley) (Hemiptera: Psyllidae)
Thomas, D.B. 2011. Entomological News, 122(3):279-287.
7.Biosystematics of hackberry psyllids (Pachypsylla) and the evolution of gall and lerp formation in psyllids
Yang, M.-M. & C. Mitter. 1993. The Ecology and Evolution of Gall-forming Insects. United States Dept. of Agriculture.
8.The psyllids of America North of Mexico: (Psyllidae: Homoptera) (Subfamilies Psyllinae and Triozinae)
Tuthill, L.D. . 1943. Iowa State College Journal of Science 17: 443-660.