Callospermarion pusillum
- Citations total:
- 2
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| details | Carboniferous | Illinois | Stidd,B.M. et al. The natural affinity of the Carboniferous seed, Callospermarion. | 1970 | |
| details | Carboniferous | USA | Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. | 1995 |