Microspora pachyderma
- Citations total:
- 2
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| original | Middle Eocene | Colorado | Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. | 1931 | |
| original | Middle Eocene | Utah | Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. | 1931 |