Olpidiopsidales

chromist order

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July 19, 2026

Quick Summary

The Olpidiopsidales are an order within the phylum Oomycota, which are microorganisms commonly found in aquatic and soil environments. Organisms in the Olpidiopsidales are known to be pathogenic on marine plants, including laver (nori). Their thallus, or vegetative body, infects the host cells. The taxonomic classification of these organisms places them within the kingdom Chromista. The term "Olpidiaceae" refers to a family within the order Chytridiales, a different fungal group, where each thallus develops into a single sporangium.12

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fungus
Annotated classification
Order Olpidiopsidales Pathogenic on marine plants, including laver (nori); thallus infects cells of host; example genus is Olpidiopsis. Order Peronosporales Aquatic or terrestrial; parasitic on algae or vascular plants, the latter mostly obligate parasites causing downy mildews; in advanced
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Order Olpidiopsidales Pathogenic on marine plants, including laver (nori); thallus infects cells of host; example genus is Olpidiopsis. Order Peronosporales Aquatic or terrestrial; parasitic on algae or vascular plants, the latter mostly obligate parasites causing downy mildews; in advanced
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