Tetrad type A
- Citations total:
- 2
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| original | Late Ordovician | Czechoslovakia | VavrdovЎ,M. Some plant microfossils of possible terrestrial origin from the Ordovician of Central Bohemia. | 1984 | |
| original | Late Telychian | Norway | Smelror,M. Llandovery and Wenlock miospores and spore-like microfossils from the Ringerike District, Norway. | 1987 |