Basidiomycota (Basidiomycete Fungi) is a phylum of Fungi. There are 48404 species of Basidiomycete Fungi, in 2197 genera and 226 families. This phylum has been around since the aptian age.
Definition: The number of fossil occurrences in the Paleobiology Database (https://paleobiodb.org) that are identified as belonging to a particular taxon or any of its subtaxa.
Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)