Superfamily
Protorthoidea Schuchert et Cooper 1931
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Protorthida |
| Superfamily | Protorthoidea |
| Skenidioidea |
See also
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Protorthida |
| Superfamily | Protorthoidea |
| Skenidioidea |