Ulmus sp. Stap.1976
- Citations total:
- 2
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| original | Early Tertiary | Late Tertiary | Canada(NWT,Mackenzie) | Staplin,F.L. Tertiary biostratigraphy, MacKenzie Delta Region, Canada. | 1976 |
| original | Early Eocene | Middle Eocene | Alaska(North Slope) | Frederiksen,N.O. et al. Palynology of Eocene strata in the Sagavanirktok and Canning Formations on the North Slope of Alaska. | 2002 |