Host jumping onto close relatives and across kingdoms by <i>Tyrannicordyceps</i> (Clavicipitaceae) gen. nov. and <i>Ustilaginoidea</i>_(Clavicipitaceae)

The host habitat hypothesis best explains the dynamic evolution of host affiliations seen in Clavicipitaceae and throughout Hypocreales. Co-occurrence in the same habitat has allowed for host shifts from animals to plants, and from plants to fungi.