Definition: A subphylum of the phylum Protozoa, characterized by the presence of spores of multicellular origin, usually with two or three valves, two or more polar filaments, and an ameboid sporoplasm; parasitic in lower vertebrates, especially common in fishes. Important genera include Ceratomyxa, Hanneguya, Leptotheca, Myxidium, and Myxobolus.
[myxo- + G. sporos, seed]
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Examples: glitazone, GI cocktail, etc.