Flavodon-ambrosius
Guides
Ambrosiodmus hagedorni
Ambrosiodmus hagedorni is an ambrosia beetle in the weevil family Curculionidae, described by Wood & Bright in 1992. Like other members of its genus, it farms the white-rot decay fungus Flavodon ambrosius, a unique symbiont capable of true wood decomposition. This mutualism enables the beetle to colonize and persist in decaying wood over multiple generations, supporting larger colony sizes than typical ambrosia beetles. The species is known from Brazil and represents part of a distinctive beetle-fungus symbiosis that differs fundamentally from other ambrosia systems.
Ambrosiodmus rubricollis
Ambrosiodmus rubricollis is an ambrosia beetle native to eastern and southern Asia that has been introduced to Europe and North America. As a member of the genus Ambrosiodmus, it maintains a mutualistic symbiosis with the white-rot fungus Flavodon ambrosius, which is capable of true wood decomposition—an unusual trait among ambrosia beetles. The species has been documented attacking young Tasmanian blue gum trees (Eucalyptus globulus) in Portugal and has been detected in Slovenia and Italy. Its introduction to non-native regions raises concern given the potential of Ambrosiodmus species to vector pathogenic fungi.
Ambrosiodmus tachygraphus
Ambrosiodmus tachygraphus is a North American ambrosia beetle described by Hopkins in 1915. Like other members of the genus Ambrosiodmus, it engages in obligate mutualism with fungal symbionts, specifically the wood-decaying fungus Flavodon ambrosius. This partnership enables the beetle to colonize and reproduce in dead or dying wood by farming fungi that digest cellulose and lignin, converting wood into nutritious food for beetle larvae and adults. The species is part of a group known for forming semi-social colonies with thousands of individuals, facilitated by their unique ability to cultivate a true wood-degrading fungus rather than merely extracting readily available nutrients from freshly dead tissues.