are completely naked when ant-attended; the ant nest itself remains completely hidden under the bark of the tree.

Selected species

Notable species include:

* Abgrallaspis cyanophylli, the cyanophyllum scale
* Aonidiella aurantii, the California red scale
* Aonidomytilus crookiae the St. John's Wort scale
* Aulacaspis yasumatsui,