Ungulites bifurcus
- Citations total:
- 3
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| original | Rocklandian | Canada(Ontario) | Eller,E.R. Scolecodonts from the Trenton series (Ordovician) of Ontario, Quebec and New York. | 1945 | |
| details | Middle Devonian | North America | Taugourdeau,P. Scolecodont dispersa | 1978 | |
| details | Late Tremadocian | Early Arenigian | Canada(Newfoundland) | Underhay,N.K. et al. Lower Ordovician scolecodonts from the Cow Head Group, Western Newfoundland. | 1995 |