Phycomycetes
Phycomycetes is an obsolete polyphyletic taxon for certain fungi with nonseptate hyphae. It is used in Engler system.
The class Phycomycetes has been abolished and in its place exists Zygomycetes, Chytridiomycetes, Plasmodiophoromycetes, Hyphochytridiomycetes, Trichomycetes (including Harpellales, Asellariales, Eccrinales and Amoebidiales) and Oomycetes.