Ungulites aculeatus
- Citations total:
- 3
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| details | Middle Ordovician | Late Ordovician | Atlantic Ocean(Northwest) | Hinte,J.E. Van et al. Palaeozoic microfossils from Orphan Knoll, northwest Atlantic Ocean. | 1995 |
| details | Middle Ordovician | North America | Taugourdeau,P. Scolecodont dispersa | 1978 | |
| original | Mohawkian | Minnesota | Stauffer,C.R. Middle Ordovician polychaeta from Minnesota. | 1933 |