Microbiologist John McCutcheon of the University of Montana, Missoula, was intrigued by
the citrus mealybug's (Planococcus citri's) unique setup.
The citrus mealybug (main image) needs its nested bacterial buddies (inset, bigger blue blobs = Tremblaya red smaller ones = Moranella) to make the most of its meals.
Many sap - eating insects rely on helpful bacteria, or symbionts, to make amino acids, but none of them has
the citrus mealybug's nested microbes.