Sphaerochitina silurica
- Citations total:
- 2
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| details | Llandoverian | Brazil(Goias) | Grahn,Y. et al. Silurian and Lower Devonian chitinoan biostratigraphy of the Parana Basin in Brazil and Paraguay. | 2000 | |
| original | Early Aeronian | Paraguay | Grahn,Y. et al. Silurian and Lower Devonian chitinoan biostratigraphy of the Parana Basin in Brazil and Paraguay. | 2000 |