Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
   Subphylum Agaricomycotina Doweld (2001)
     Class Agaricomycetes Doweld (2001)
       Order Geastrales K. Hosaka & Castellano (2007)
         1 Family Geastraceae Corda (1842)
         2 Family Sclerogastraceae Locq. ex P.M.Kirk (2008)
         3 Genus Boninogaster Kobayasi (1937), incertae sedis