Sternorrhyncha

Taxobox
name = Aphids, Whiteflies, Scales, etc
regnum = Animalia
phylum = Arthropoda
classis = Insecta
ordo = Hemiptera
subordo = Sternorrhyncha
subdivision_ranks = Superfamilies
subdivision =
Aleyrodoidea
Aphidoidea
Coccoidea
Phylloxeroidea
Psylloidea

The Sternorrhyncha is the suborder of the Hemiptera which contains the aphids, whiteflies, and scale insects, groups which were traditionally included in the order Homoptera. "Sternorrhyncha" refers to the rearward position of the mouthparts relative to the head. Distributed worldwide, all members of this group are plant-feeders, and many are major crop and ornamental pests. Many exhibit modified morphology and/or life cycles, including phenomena such as flightless morphs, parthenogenesis, sexual dimorphism, and even eusociality.

Well-known groups in the Sternorrhyncha include:

* aphids - (Aphididae and allied families)
* woolly and gall-making aphids (Eriosomatinae, Pemphigidae)
* pine and spruce aphids (Adelgidae, Chermesidae)
* phylloxerans (Phylloxeridae, including Vine Phylloxera)
* whiteflies - (Aleyrodidae)
* jumping plant lice - (Psyllidae and allied families)
* Superfamily Coccoidea (scale insects)
** cottony cushion scales, giant coccids, and ground pearls (Margarodidae)
** armored scale (Diaspididae)
** cochineal (Dactylopiidae)
** lac scales (Kerriidae, Lacciferidae)
** soft scales (Coccidae)
** pit scales (Asterolecaniidae)
** mealybugs (Pseudococcidae)
** felted scales (Eriococcidae)