Genus
Oppelia
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Ammonoidea |
| Order | Ammonitida |
| Suborder | Haploceratina |
| Superfamily | Haploceratoidea |
| Family | Oppeliidae |
| Subfamily | Taramelliceratinae |
| Genus | Hecticoceras |
| Oppelia |
See also