Orthoceras sp
- Citations total:
- 2
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| details | Late Wenlockian | Early Ludlovian | Romania | Givulescu,R. Fossil flora of Romania. (3rd Supplement) | 1978 |
| details | Late Smithian | Barents Sea | Vigran,J.O. et al. Biostratigraphy and sequence stratigraphy of the Lower and Middle Triassic deposits from the Svalis Dome, Central Barents Sea, Norway. | 1998 |