< Dichotomous Key 
 
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Key to Cnidaria
| Animalia keys | 
| Subkingdom | 
|---|
| Agnotozoa | 
| Phyla | 
| Acoelomorpha | Cnidaria | Ctenophora | Myxozoa | Orthonectida | Placozoa | Porifera | Rhombozoa | 
| Superphylum:Deuterostomia | 
| Chaetognatha | Chordata | Echinodermata | Hemichordata | 
| Superphylum:Ecdysozoa | 
| Arthropoda | Kinorhyncha | Loricifera | Nematoda | Nematomorpha | Onychophora | Priapulida | Tardigrada | 
| Superphylum:Lophotrochozoa | 
| Annelida | Brachiopoda | Ectoprocta | Entoprocta | Mollusca | Nemertea | Phoronida | Sipuncula | 
| Superphylum:Platyzoa | 
| Acanthocephala | Cycliophora | Gastrotricha | Gnathostomulida | Micrognathozoa | Platyhelminthes | Rotifera | 
1: Medusozoa
incomplete
Cubozoa Hydrozoa Polypodiozoa Scyphozoa Staurozoa
2
3
incomplete
- Polypodium hydriforme: Intracellular cnidarian parasite. Parasite of sturgeon eggs.
- Myxozoa
4
- Hexacorallia: Polyps have 6-fold symmetry
- Octocorallia: Polyps have 8-fold symmetry
5
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