Tetrad type B
- Citations total:
- 2
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| original | Late Telychian | Early Sheinwoodian | Norway | Smelror,M. Llandovery and Wenlock miospores and spore-like microfossils from the Ringerike District, Norway. | 1987 |
| original | Paleocene | India(Meghalaya) | Kumar,M. Pollen Tetrads from Palaeocene sediments of Meghalaya, India: Comments on their morphology, botanical affinity and geological records | 1995 |