^ 3.03.1See for instance the Systema Naturae 2000 classification or the O. E. Eriksson (2006) classification in Taxonomicon (頁面存檔備份,存於互聯網檔案館) for the taxonomic tree. Other classification systems do not necessarily recognize the subphylum level, for instance Index Fungorum (頁面存檔備份,存於互聯網檔案館) puts Saccharomycetes directly as a daughter of Ascomycota.