Nowadays, the genus Ganoderma has 427 taxa (including species, subspecies, varieties, forms, etc.) around the globe.
The following .pdf file collects the list of all the taxa of Ganoderma currently found in the world, with references to the people who gave their names (authors) and the year of publication of each taxon.
Moreover, each of the taxa has an associated webpage where you will be able to find much more information about the taxon: description, photographs (in some cases), classification, link to molecular bases, etc.
We hope it will be useful for you.