Austroplatypus incompertus

Austroplatypus incompertus, a type of ambrosia beetle, is endemic to Australia. They are found in mesic forests, and subtropical and tropical ecosystems along the east coast of Australia. There are many unique characteristics attributable to A. incompertus, like their gallery excavation in several Eucalyptus species, their obligate eusocial behavior, their relationship with fungi, and their unusual sexual dimorphism. These beetles are one of the few insects outside of Hymenoptera and Isoptera that display obligate eusocial behavior. Additionally, their sexually dimorphic traits are of interest, since males are smaller than females, the reverse of the pattern seen in other ambrosia beetles.