Ungulites tridens
- Citations total:
- 3
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| original | Gedinnian | Givetian | Africa(Sahara) | Taugourdeau,P. The Scolecodonts of Silurian, Devonian and Carboniferous of the Saharian Probes, stratigraphy and systematics | 1968 |
| details | Middle Frasnian | France(Garonne,Haute) | Taugourdeau,P. Scolecodonts of the Frasnian of Boulogne | 1971 | |
| details | Early Devonian | Middle Devonian | Africa(Sahara) | Taugourdeau,P. Scolecodont dispersa | 1978 |