Claim: Myxozoa, an unranked subphylum of aquatic parasitic cnidarian animals, are part of the phylum Cnidaria but have many classes, orders, and families.
Evidence: Myxozoa (etymology: Greek: μύξα myxa "slime" or "mucus" + thematic vowel o + ζῷον zoon "animal") is an unranked subphylum of aquatic, obligately parasitic cnidarian animals and contains the smallest animals ever known to have lived. Over 2180 species have been described and some estimates have suggested at least 30,000 undiscovered species. Kingdom: Animalia Phylum: Cnidaria (unranked): Myxozoa
Grassé, 1970 It seems clear that myxozoans belong to the phylum Cnidaria although they have many differences. For this reason, the mixozoan taxonomy has undergone great and important changes in its levels of generic, family and suborder classification. Thus, a new classification in the phylum Cnidaria was proposed with the taxonomic revision based on spores up to the gender level. Phylum: Cnidaria Subphylum: Myxozoa (unranked) Class: Malacosporea Class: Myxosporea (sequel) Order: Malacovalvulida Order: Bivalvulida Family: Saccosporidae Family: Myxobilatidae Genus: Buddenbrockia, Tetracapsuloides Genus: Myxobilatus, Acauda, Hoferellus Class: Myxosporea Family: Chloromyxidae Order: Bivalvulida Genus: Chloromyxum, Caudomyxum, Agarella Suborder: Variisporina Family: Coccomyxidae Family: Sphaeromyxidae Genus: Coccomyxa, Auerbachia, Globospora Genus: Sphaeromyxa Family: Alatosporidae Family: Myxidiidae Genus: Alatospora, Pseudalatospora, Renispora Genus: Myxidium, Zschokkella, Enteromyxum, Sigmomyxa, Soricimyxum, Cystodiscus Family: Parvicapsulidae Family: Ortholineidae Genus: Parvicapsula, Neoparvicapsula, Gadimyxa Genus: Ortholinea, Neomyxobolus, Cardimyxobolus, Triangula, Kentmoseria Suborder: Platysporina Family: Sinuolineidae Family: Myxobolidae Genus: Sinuolinea, Myxodavisia, Myxoproteus, Bipteria, Paramyxoproteus, Neobipteria, Schulmania, Noblea, Latyspora Genus: Myxobolus, Spirosuturia, Unicauda, Dicauda, Phlogospora, Laterocaudata, Henneguya, Hennegoides, Tetrauronema, Thelohanellus, Neothelohanellus, Neohenneguya, Trigonosporus Family: Fabesporidae Order: Multivalvulida Genus: Fabespora Family: Trilosporidae Family: Ceratomyxidae Genus: Trilospora, Unicapsula Genus: Ceratomyxa, Meglitschia, Ellipsomyxa, Ceratonova Family: Kudoidae Family: Sphaerosporidae Genus: Kudoa Genus: Sphaerospora, Wardia, Palliatus Family: Spinavaculidae Genus: Octospina *Incertae sedis in Multivalvulida: Trilosporoides