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Baltisphaeridium ohioense
| ohioense | |
| Winslow, M.R. (1962) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| other | |
| ohioense | |
| Winslow, M.R. (1962) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| other | |