Species
Cyrtospirifer archiaci (Murchison, 1840)
Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Spiriferida |
| Suborder | Spiriferidina |
| Superfamily | Cyrtospiriferoidea |
| Family | Cyrtospiriferidae |
| Subfamily | Cyrtospiriferinae |
| Genus | Cyrtospirifer |
| Species | archiaci |
| disjunctus | |
| latavicus | |
| verneuili | |
| whitneyi |