Polypodium is a genus of parasitic cnidarians; the only genus in family Polypodiidae. Polypodium hydriforme is a parasite of the eggs of sturgeon and similar fishes (Acipenseridae and Polyodontidae). It is one of few cnidarians living inside the cells of other animals. Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Subregnum Parazoa Porifera Subregnum Eumetazoa Placozoa Orthonectida Rhombozoa Radiata (unranked) Ctenophora Cnidaria Bilateria (unranked) Acoelomorpha Myxozoa Superphylum Deuterostomia Chordata Hemichordata Echinodermata Chaetognatha Superphylum Ecdysozoa Kinorhyncha Loricifera Priapulida Nematoda Nematomorpha Onychophora Tardigrada Arthropoda Superphylum Platyzoa Platyhelminthes Gastrotricha Rotifera Acanthocephala Gnathostomulida Micrognathozoa Cycliophora Superphylum Lophotrochozoa Sipuncula Nemertea Phoronida Bryozoa Entoprocta Brachiopoda... Classes Anthozoa - Corals and sea anemones Scyphozoa - Jellyfish Staurozoa - Stalked jellyfish Cubozoa - Sea wasps or box jellyfish Polypodiozoa Hydrozoa - Hydroids, hydra-like animals Cnidaria (silent c - pronounced // from New Latin cnida, fr. ... In biology, binomial nomenclature is the formal method of naming species. ... Classes Anthozoa - Corals and sea anemones Scyphozoa - Jellyfish Staurozoa - Stalked jellyfish Cubozoa - Sea wasps or box jellyfish Polypodiozoa Hydrozoa - Hydroids, hydra-like animals Cnidaria (silent c - pronounced // from New Latin cnida, fr. ... To meet Wikipedias quality standards, this article may require cleanup. ... Family Acipenseridae Unterfamilie Acipenserinae Genus Acipenser Acipenser baerii Siberian sturgeon, Acipenser baerii baerii Baikal sturgeon, Acipenser baerii baicalensis Shortnose sturgeon, Acipenser brevirostrum (USA) Yangtze sturgeon, Acipenser dabryanus Lake sturgeon, Acipenser fulvescens (USA) Russian sturgeon, Acipenser gueldenstaedtii Green sturgeon, Acipenser medirostris Sakhalin sturgeon, Acipenser mikadoi Japanese sturgeon, Acipenser multiscutatus Adriatic sturgeon... Species Polyodon spathula Psephurus gladius Paddlefishes (family Polyodontidae) are bizarre-looking primitive ray-finned fishes whose snouts are greatly elongated, about 1/2 the length of the rest of the body. ...

The taxonomic position of Polypodium is unclear; it was formerly classified as Narcomedusae, but is now treated as its own class of cnidarians. Based on DNA analysis, a relationship with Myxozoa has been proposed, but this is controversial. Classes Malacosporea Myxosporea The Myxozoa are a group of microscopic, parasitic animals. ...

References

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