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Class: Bivalvia
| Order | Family | Common | count |
|---|---|---|---|
| Pterioida | Inoceramidae |
9 | |
| Pterioida | Limidae |
File Clams | 2 |
| Pterioida | Myalinidae |
1 | |
| Pterioida | Pinnidae |
Penn | 2 |
| Pterioida | Pteriidae |
3 |
Formation: Boquillas
Brewster County | 168
Formation: Austin Chalk
Williamson County | W1-490
Formation: Austin Chalk
Williamson County | 264
Formation: Ozan
Fannin County | NS-369
Formation: Eagle Ford
Williamson County | 90
Formation: Austin Chalk
Travis County | 7
Formation: Austin Chalk
Williamson County | 116
Formation: Eagle Ford/Atco
Grayson County | PO-668
Formation: Eagle Ford/Atco
Grayson County | PO-667
Formation: Buda
Williamson County | 686
Formation: Comanche Peak
Bell County | BL2-846
Formation: GrahamThrifty
Jack County | J1-779
Formation: Comanche Peak
Bell County | BL2-829
Formation: Comanche Peak
Bell County | BL2-830
Formation: Fort Terrett
Kerr County | K1-821
Formation: Fort Terrett
Kerr County | K1-812
Formation: Fort Terrett
Kerr County | K1-826
