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Cladus: Eukaryota Supergroup: Opisthokonta Regnum: Animalia Subregnum: Eumetazoa Phylum: Cnidaria Classis: Hydrozoa Ordo: Hydroida Subordo: Hydrida Familia: Protohydridae Genus: Protohydra
Biology Encyclopedia
Cnidaria Images
Source: Wikispecies: All text is available under the terms of the GNU Free Documentation License
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