Genus
Atrypina Hall et Clarke, 1893
List of species
1. Atrypina (Atrypina) barrandii (Davidson, 1848) | Wenlock
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Atrypida |
| Suborder | Atrypidina |
| Superfamily | Atrypoidea |
| Family | Atrypinidae |
| Subfamily | Atrypininae |
| Genus | Atrypina |
| Subgenus | (Atrypina) |
| Genus | Gracianella |