Comparison of Similar Phyla
| Feature | Phoronids | Brachiopods | Bryozoans | Entoprocts |
|---|---|---|---|---|
| Tentacles hollow | Yes | Yes | Yes | no |
| Protection and support | Erect tube of chitin | Shell with two valves | Various, including chitin, mineralized skeletons, plant-like shapes, and a mass of gelatinous material | none |
| Feeding flow | Top to bottom | In through sides of shell, out through front | Top to bottom | Bottom to top |
| Anus | Outside ring of tentacles | In the mantle, or none and solid waste is ejected out of the mouth | Outside ring of tentacles | Inside ring of tentacles |
Read more about this topic: Phoronid
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