(repens). | n o |
| a . | | | | A l |
| o s | | | | | b |
| z r | \_______________ _______________/ | |
| a e | \/ | o |
| t y | _Gastraea_ | N |
| e a | (Ontogeny : Gastrula). | |
| M l | | | |
| | | | | |
| m | | | |
| r | | | |
| e | | | |
| g | | | |
| | | | |
| y | | | |
| r | | | |
| a | | | |
| m | | | |
| i | | | |
| r | | | |
| P | | | |
| | | | |
| o | | | |
| w | | | |
| T | | | |
|______| _________|_________________________|______|
| | | |
| | __________| |
| | | |
| . | | |
| t | Planaeada Acinetae. Ciliata. |
| u | (Ontogeny : Planula). | | |
| g | | \_________ _________/ |
| > | | \/ |
| i o | | Infusoria.