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Palaeoperidinium pyramidale
| pyramidale | |
| Harris, W.K. (1974) | |
| Stover, L.E. and Evitt, W.R. (1978) | |
| active | |
| pyramidale | |
| Harris, W.K. (1974) | |
| Stover, L.E. and Evitt, W.R. (1978) | |
| active | |