Subfamily
Leiorhynchinae Stainbrook, 1945
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Rhynchonellida |
| Superfamily | Camarotoechioidea |
| Family | Leiorhynchidae |
| Subfamily | Fenestrirostrinae |
| Leiorhynchinae | |
| Genus | Leiorhynchus |