Genus
Peratagnostus Öpik, 1967
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Agnostida |
| Family | Spinagnostidae |
| Genus | Cotalagnostus |
| Doryagnostus | |
| Hypagnostus | |
| Peratagnostus | |
| Tomagnostella |
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Agnostida |
| Family | Spinagnostidae |
| Genus | Cotalagnostus |
| Doryagnostus | |
| Hypagnostus | |
| Peratagnostus | |
| Tomagnostella |