Order Ptychodiscales part
From dinoflaj2
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| Pellicle developed as rigid, peripheral, basket-like skeleton. | Pellicle not developed into external skeleton. | |
| AMPHITHOLACEAE | PTYCHODISCACEAE | |
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| Pellicle developed as rigid, peripheral, basket-like skeleton. | Pellicle not developed into external skeleton. | |
| AMPHITHOLACEAE | PTYCHODISCACEAE | |
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