Subfamily
Najadospirifer Havliček, 1957
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Spiriferida |
| Suborder | Spiriferidina |
| Superfamily | Martinioidea |
| Family | Elythynidae |
| Subfamily | Najadospirifer |
| Species | najadum |