The team, led by James Cook University's Associate Professor Eric Roberts, discovered the oldest known example of fungus gardens within fossil termite nests from the Great Rift Valley of Africa in 25 million year old sediments.
Fungus farming termite colonies cultivate fungi in gardens in subterranean nests or chambers, helping to convert plant material into a more easily digestible food source for the termites.
Assoc Prof Roberts said that scientists had previously used DNA from modern termites to estimate the origin of termite 'fungus farming' behavior back to at least 25 to 30 million years ago.