Genus
Truncatiramus Kjellesvig-Waering, 1961
Luokittelu
| Organism group | Biota |
| Domain | Eukaryota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Chelicerata |
| Order | Eurypterida |
| Infraorder | Diploperculata |
| Superfamily | Pterygotoidea |
| Family | Pterygotidae |
| Genus | Erettopterus |
| Pterygotus | |
| Truncatiramus |