ClassOomycetes
| Taxon: | Rank: |
| Albuginales | order |
| Anisolpidiales | order |
| Bigyromonadea | class |
| Combresomyces | genus |
| Haptoglossales | order |
| Hyphochytrea | class |
| Lagenidiales | order |
| Leptomitales | order |
| Miracula | genus |
| Peronosporales | order |
| Peronosporea | class |
| Peronosporomycetes | class |
| Rozellopsidales | order |
| Saprolegniomycetes | class |
| Sclerosporales | order |