Genus
Pakrioceras Stumbur et Mutvei, 1983
Aiheeseen liittyvät julkaisut
Stumbur, H., Mutvei, H. 1983. A new Middle Ordovician torticonic nautiloid. GFF 105, 1, 43-47. DOI:DOI: 10.1080/11035898309455293
List of species
1. Pakrioceras holmi Stumbur et Mutvei, 1983 | Aseri Stage
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Tarphyceratia |
| Order | Tarphyceratida |
| Family | Estonioceratidae |
| Genus | Aethoceras |
| Aphetoceras | |
| Aserioceras | |
| Bentoceras | |
| Clytoceras | |
| Eichwaldoceras | |
| Estonioceras | |
| Falcilituites | |
| Pakrioceras | |
| Species | holmi |
| Genus | Planctoceras |
| Pycnoceras | |
| Shumardoceras | |
| Tragoceras |