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Baltisphaeridium plicatum
| plicatum | |
| Maier, D. (1959) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| Spiniferites ramosus ssp. gracilis.jpg | |
| other | |
| plicatum | |
| Maier, D. (1959) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| Spiniferites ramosus ssp. gracilis.jpg | |
| other | |