The Phyla of Kingdom Animalia
| Phylum | Common Name | Number of Species | |
| Porifera | sponges | 10,000 | |
| Symplasma | glass sponges | 500 | |
| Placozoa | placozoan | 1 | |
| Cnidaria | hydroids, jelly fish, sea anemones, corals | 10,000 | |
| Ctenophora | comb jellies | 100 | |
| Rhombozoa | small; obscure parasites | 75 | |
| Platyhelminthes | flatworms | 25,000 | |
| Orthonecta | orthonectidans | 10 | |
| Gnathostomula | gnathostomulans | 100 | |
| Gastrotricha | gastrotrichs | 450 | |
| Nematoda | roundworms | 20,000 | |
| Nematomorpha | nematomorphs | 325 | |
| Kinorhyncha | mud-dragons | 150 | |
| Loricifera | loriciferans | 100 | |
| Priapula | priapulans | 17 | |
| Rotifera | rotifers | 1800 | |
| Acanthocephala | thorny-headed worms | 1000 | |
| Onychophora | velvet worms | 70 | |
| Uniramia | uniramians or ateloceratans | 1,000,000 | These Phyla togther make up a group traditionally called Arthropoda, because they share a hardened exoskleton and jointed legs. |
| Chelicerata | chelicerates (98% arachnids) | 63,000 | |
| Crustacea | crustaceans | 40,000 | |
| Pentastoma | tongue worms | 100 | |
| Tardigrada | water bears | 600 | |
| Mollusca | molluscs | 100,000 | |
| Sipuncula | peanut worms | 350 | |
| Echiura | echiuroid worms | 150 | |
| Annelida | segmented worms | 15,000 | |
| Pogonophora | beard worms | 150 | |
| Nemertea | nemertine worms | 900 | |
| Entoprocta | entoprocts or kamptozoans | 150 | |
| Cycliophora | cycliophoran | 1 | |
| Phorona | phoronans | 20 | |
| Brachiopoda | brachiopods | 350 (25,000 fossil) | |
| Bryozoa | bryozoans or ectoprocta or polyzoa | 4300 | |
| Chaetognatha | arrow-worms | 90 | |
| Echinodermata | star fish, sea cucumbers, sea urchins | 7000 | |
| Hemichordata | hemichordates | 90 | |
| Chordata | chordates (including ourselves!) | 42,500 |
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