Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Fungi Whittaker - fungi |
| divisio | Basidiomycota R. T. Moore - club fungi |
| subphylum | Agaricomycotina Doweld |
| class | Agaricomycetes |
| Agaricomycetes incertae sedis | |
| order | Polyporales Gäum. - shelf fungi |
| family | Fomitopsidaceae |
| genus | Fomitopsis P. Karst. |
| species | Fomitopsis spraguei (Berk. & M.A. Curtis) Gilb. & Ryvarden |