the root (no rank)
Eukaryota (domain)
stramenopiles (kingdom)
Oomycetes (phylum)
Peronosporales (order)
Pythiaceae (family)
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Phytophthora (genus)
Pythium aphanidermatum (species)
Pythium oligandrum (species)
Pythium ultimum (species)
Pythium vexans (species)