Species
Symphysurus angustatus (Boeck, 1838)
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Asaphida |
| Superfamily | Cyclopygoidea |
| Family | Nileidae |
| Genus | Symphysurus |
| Species | angustatus |
| palpebrosus |
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Asaphida |
| Superfamily | Cyclopygoidea |
| Family | Nileidae |
| Genus | Symphysurus |
| Species | angustatus |
| palpebrosus |