Genus
Praetrilogania Blom, 1999
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Superclass | Agnatha |
| Class | Pteraspidomorphi |
| Subclass | Thelodonti |
| Order | Shieliiformes |
| Family | Shieliidae |
| Genus | Nethertonodus |
| Paralogania | |
| Praetrilogania | |
| Shielia | |
| Valiukia |