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| Group | Order | Common | count |
|---|---|---|---|
| Fish | Pycnodontiformes |
1 | |
| Fish | zNone |
2 | |
| Reptiles | Crocodilia |
Crocodilians | 1 |
| Reptiles | Squamata |
Reptiles | 3 |
zNone |
1 |
>Order: Crocodilia
Formation: Eagle Ford
Williamson County | 338
>Order: Pycnodontiformes
Formation: Eagle Ford/Atco
Grayson County | PO-704
>Order: Squamata
Formation: Ozan
Fannin County | NS-108
Formation: Ozan
Fannin County | NS-367
Formation: Ozan
Fannin County | NS-368
>Order: zNone
Formation: Eagle Ford/Atco
Grayson County | PO-598
Formation: Ozan
Fannin County | NS-402
Formation: Eagle Ford/Atco
Ellis County | MID-791
| Period | Formation | count |
|---|---|---|
| Cretaceous | Eagle Ford | 1 |
| Cretaceous | Eagle Ford/Atco | 3 |
| Cretaceous | Ozan | 4 |