The data reported here support the manuscript Nuske et al. (2017) [1]. Searches were made for quantitative data on the occurrence of fungi within dietary studies of Australian mammal species. The original location reported in each study was used as the lowest grouping variable within the dataset. To standardise the data and compare dispersal events from populations of different mammal species that might overlap, data from locations were further pooled and averaged across sites if they occurred within 100 km of a random central point. Three locations in Australia contained data on several (>7) mycophagous mammals, all other locations had data on 1-3 mammal species. Within these three locations, the identity of the fungi species was compared between mammal species' diets. A list of all fungi species found in Australian mammalian diets is also provide along with the original reference and fungal synonym names.

Hypogeous sequestrate (truffle-like) fungi rely primarily on consumption by mammals for dispersal. Most truffle-like fungi are ectomycorrhizal, making mammalian dispersers essential to the maintenance of plant-fungal relationships, soil fungal diversity and ecosystem functioning. Australia has the highest current global rate of mammalian extinctions, including important fungal specialists within the family Potoroidae. Knowing the relative importance of different mammal species as dispersers helps us to understand how this loss in mammal diversity could affect plant-fungi interactions and fungal diversity. Despite detecting a sampling bias in the literature, our meta-analysis confirms that mammals with fungal specialist diets contribute disproportionally more to the potential dispersal of fungi than other mammals within Australia. Three mammal species with generalist diets also consumed fungi at comparable rates to fungal specialist species and, importantly, persist in many areas where fungal specialists are now absent. These results highlight the significance of mammals, particularly fungal specialists, for maintaining diverse ectomycorrhizal fungal communities.