Mealybug

Mealybugs are insects in the family Pseudococcidae, unarmored scale insects found in moist, warm climates.

Acropyga
Fossil specimens of genus Acropyga have been found in Dominican amber carrying the extinct mealybug genus Electromyrmococcus (Johnson et al., 2001). These fossils represent the oldest record of the symbiosis between mealybugs and Acropyga species.

Cladomyrma
A southeastern Asian genus, established colonies of Cladomyrma never lack sap-sucking scale insects inside their nest hollows, and the ants appear to be dependent on their honeydew excretions (Moog et al. 2005). Dissection of 338 founding chambers of eight Cladomyrma species showed that coccoid abundance strongly increases with founding age. The scale insects belong to a wide range of taxa, mainly Pseudococcidae. Coccidae are rare except in Cladomyrma maschwitzi.