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    Palaeoperidinium hansonianum
                    | hansonianum | |
| Traverse, A. (1955) | |
| Stover, L.E. and Evitt, W.R. (1978) | |
| junior synonym | |
| hansonianum | |
| Traverse, A. (1955) | |
| Stover, L.E. and Evitt, W.R. (1978) | |
| junior synonym | |