Aleyrodoidea Aphidoidea Coccoidea Phylloxeroidea Psylloidea †Dinglidae The Sternorrhyncha[1][2][3] suborder of the Hemiptera contains the aphids, whiteflies, and scale insects, groups which were traditionally included in the now-obsolete order "Homoptera".

Distributed worldwide, all members of this group are plant-feeders, many considered pests feeding on major crops and ornamental plants.

Many exhibit modified morphology and/or life cycles, including phenomena such as flightless morphs, parthenogenesis, sexual dimorphism, and eusociality.

Aleyrodoidea (whiteflies) Coccoidea (scale insects) Phylloxeroidea (phylloxera bugs) Aphididae (aphids) The evolutionary position of several fossil taxa are unclear.

A suggested phylogeny is:[4][5] Boreoscytidae Pincombeidae Simulaphididae Coccidomorpha Dracaphididae Naibiidae Sinojuraphididae Aphidomorpha †Protopsyllidioidea †Dinglomorpha Aleyrodomorpha †Liadopsyllidae Psylloidea Well-known groups in the Sternorrhyncha include: