Family
Poramborthidae Havliček, 1950
Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Orthida |
| Suborder | Orthidina |
| Superfamily | Orthoidea |
| Family | Glyptorthidae |
| Hesperorthidae | |
| Lycophoriidae | |
| Nanorthidae | |
| Orthidae | |
| Orthidiellidae | |
| Plaesiomyidae | |
| Poramborthidae | |
| Productorthidae | |
| Genus | Cyrtonotella |
See also