^ 3.03.1See for instance the Systema Naturae 2000 classification or the O. E. Eriksson (2006) classification in Taxonomicon (页面存档备份,存于互联网档案馆) for the taxonomic tree. Other classification systems do not necessarily recognize the subphylum level, for instance Index Fungorum (页面存档备份,存于互联网档案馆) puts Saccharomycetes directly as a daughter of Ascomycota.