Systematics
The main families of scale insects are:
- Margarodidae – cottony cushion scales, giant coccids and ground pearls
- Diaspididae – armored scales
- Dactylopiidae – cochineal
- Kerriidae – lac scales
- Coccidae – soft scales
- Asterolecaniidae – pit scales
- Pseudococcidae – mealybugs
- Eriococcidae – felted scales
A number of other families are known only from fossils, including Arnoldidae, Electrococcidae, Grimaldiellidae, Grohnidae, Hammanococcidae, Inkaidae, Jersicoccidae, Kukaspididae, Labiococcidae, Lebanococcidae, Lithuanicoccidae, Pennygullaniidae, Serafinidae and Weitschatidae.
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