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Baltisphaeridium pseudohystrichodinium ssp. magnum
| pseudohystrichodinium ssp. magnum | |
| Wetzel, W. (1955) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| other | |
| pseudohystrichodinium ssp. magnum | |
| Wetzel, W. (1955) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| other | |