Spore type P29b
- Citations total:
- 2
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| original | Early Gondwana | Uruguay | Martinez-Macchiavello,J.C. Microsporomorph types contained in the Glacial Base of the Gondwana system of Uruguay | 1963 | |
| original | Nd | Nd | Hart,G.F. The systematics and distribution of Permian miospores. | 1965 |