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Class: Bivalvia
| Order | Family | Common | count |
|---|---|---|---|
| Nuculanida | Malletiidae |
1 | |
| Nuculanida | Nuculanidae |
2 |
Formation: GrahamThrifty
Jack County | J1-549
Formation: GrahamThrifty
Jack County | J1-517
Formation: Barnett Shale
San Saba County | 765
