Flavodon
Guides
Ambrosiodmus
Ambrosiodmus is a genus of ambrosia beetles (Scolytinae) in the family Curculionidae, comprising at least 100 described species. These beetles are distinguished by their obligate mutualism with the white-rot decay fungus Flavodon subulatus (formerly Flavodon ambrosius), a unique symbiosis among ambrosia beetles. Unlike most ambrosia fungi that merely extract nutrients from recently dead wood, Flavodon is a true wood degrader capable of decomposing cellulose and lignin. This superior fungal mutualist enables Ambrosiodmus species to establish large, semi-social colonies with thousands of individuals and to colonize and decay wood over multiple generations. Several species, including A. minor and A. rubricollis, have become invasive outside their native ranges.
Ambrosiodmus minor
Punky Wood Ambrosia Beetle
Ambrosiodmus minor is an invasive ambrosia beetle in the southeastern United States, including Florida. It cultivates a unique ambrosia fungus, Flavodon subulatus, which causes rapid wood rot in dead trees. The beetle is considered of low economic importance as evident major impacts have not been observed, though wood decay from this association is increasing across its introduced range. Native to Asia, it has established populations in North America and has been recorded from mainland China with documented host associations on multiple tree genera.
Ambrosiodmus obliquus
Ambrosiodmus obliquus is a species of ambrosia beetle in the weevil family Curculionidae, first described by Blackman in 1928. Like other members of the genus Ambrosiodmus, this beetle engages in a specialized symbiotic relationship with wood-decaying fungi, specifically species in the genus Flavodon. The beetle farms these fungi in galleries excavated within wood, where the fungus serves as the primary food source for both adults and larvae. This species has been documented across multiple continents including North America, the Caribbean, Middle America, Africa, and South America.