Parasitic Rhizaria

thumb|right|Life cycle of Plasmodiophora brassicae in [[cabbage.]] 220px|thumb|Clubroot on cauliflower

220px|thumb|Clubroot on cauliflower Clubroot is a common disease of cabbages, canola, broccoli, cauliflower, Brussels sprouts, radishes, turnips, stocks, wallflowers and other plants of the family Brassicaceae (Cruciferae). It is caused by Plasmodiophora brassicae, which was once considered a slime mold but is now a protist in the class Phytomyxea. It is the first phytomyxean for which the genome has been sequenced. The pathogen can evolve rapidly, and in Canada alone, 55 distinct pathotypes (sometimes called races) have been identified as of 2023, an increase from 43 pathotypes in 2020. It ca

disease of the skin of potatoes caused by the protozoa Spongospora subterranea

The Ascetosporea are a group of eukaryotes that are parasites of animals, especially marine invertebrates. The two groups, the haplosporids and paramyxids, are not particularly similar morphologically, but consistently group together on molecular trees, which place them near the base of the Cercozoa. Both produce spores without the complex structures found in similar groups (such as polar filaments or tubules).

Plasmodiophora is a genus in class Phytomyxea.

Gromiida is an order of Endomyxa. It is the only order in the class Gromiidea.