Concavisporites butorosus
- Citations total:
- 2
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| original | Cenomanian | Coniacian | Wyoming | Upshaw,C.F. Palynology of the Frontier Formation, northwestern Wind River Basin, Wyoming. | 1959 |
| original | Cenomanian | Coniacian | Wyoming | Griggs,P.H. Stratigraphy and palynology of the Frontier Formation, Big Horn Basin, Wyoming | 1970 |