Genus
Undispirifer Havliček, 1957
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Spiriferida |
| Suborder | Spiriferidina |
| Superfamily | Reticularioidea |
| Family | Reticulariidae |
| Subfamily | Reticulariinae |
| Genus | Undispirifer |
| Species | undiferus |