Subfamily
Cleiothyridininae Alvarez, Rong et Boucot, 1998
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Athyridida |
| Suborder | Athyrididina |
| Superfamily | Athyridoidea |
| Family | Athyrididae |
| Subfamily | Athyridinae |
| Cleiothyridininae | |
| Genus | Pinegathyris |
| Subfamily | Didymothyridinae |
| Spirigerellinae |