Athyris subquadrata
- kingdom: Animalia
- phylum: Brachiopoda
- class: Rhynchonellata
- order: Athyridida
- family: Athyrididae
- genus: Athyris
- species: Athyris subquadrata
Arco
Idaho- Chester
Illinois- Mount Pleasant
Iowa- McKee
Kentucky- San Saba
Texas
United States