Ptychocarpus
- Citations total:
- 4
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Geolocation
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Author - title
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Year
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| details | Late Carboniferous | Europe | Remy,W. et al. Plant fossils | 1959 | |
| details | Pennsylvanian | Nd | Brush,G.S. et al. Natural relationships of some Carboniferous spores. | 1961 | |
| details | Pennsylvanian | Nd | Brush,G.S. et al. The natural relationships of some Carboniferous microspores | 1964 | |
| details | Carboniferous | Nd | Bharadwaj,D.C. et al. Suggestions for a morphological classification of sporae dispersae. | 1968 |