plasmodiophora plasmodiophora plasmodiophora is a genus in class phytomyxea. plasmodiophora p. diplantherae resing spores scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: endomyxa class: phytomyxea order: plasmodiophorida family: plasmodiophoridae genus: plasmodiophoraworonin 1877 species plasmodiophora bicaudata feldmann 1941 plasmodiophora brassicae woronin 1877 plasmodiophora diplantherae (ferdinandsen & winge 1914) ivimey-cook 1932 plasmodiophora fici-repentis andreucci 1926 plasmodiophora halophilae ferdinandsen & winge 1913 plasmodiophora maritima feldmann 1958 synonyms ostenfeldiella ferdinandsen & winge 1914 it includes the species plasmodiophora brassicae, which causes the disease cabbage clubroot.