Punctatisporites sphaerotriangulatus
- Citations total:
- 2
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| details | Westphalian B | Westphalian C | Germany | Schopf,J.M. et al. An annotated synopsis of Paleozoic fossil spores and the definition of generic groups. | 1944 |
| details | Middle Pennsylvanian | Iowa | Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa | 1986 |