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Peridiniales
Order, Protozoan, Marine, terrestrial
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Peritrichida
Order, Protozoan, Freshwater, terrestrial
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Peronosporales – Downy Mildew
Order, Fungoid, Terrestrial
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Phaeothamniales
Order, Chromist, Marine, terrestrial
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Rhaponeidales
Order, Diatom, Marine, terrestrial
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Rhipidiales
Order, Fungoid, Terrestrial
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Rozellopsidales
Order, Fungoid, Terrestrial
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Saprolegniales
Order, Fungoid, Terrestrial
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Surirellales
Order, Diatom, Marine, terrestrial
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Tabellariales
Order, Diatom, Marine, terrestrial
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Thalassiophysales
Order, Diatom, Terrestrial
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Thalassiosirales
Order, Diatom, Marine, terrestrial
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Thallochrysidales
Order, Chromist, Terrestrial
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Thraustochytrida
Order, Fungoid, Terrestrial
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Toxariales
Order, Diatom, Terrestrial
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Vaucheriales
Order, Chromist, Marine, terrestrial