Subfamily
Quadrithyridinae Gourvennec, 1994
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Spiriferida |
| Suborder | Delthyridina |
| Superfamily | Reticularioidae |
| Family | Xenomartiniidae |
| Subfamily | Quadrithyridinae |
| Genus | Quadrithyris |
See also