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| Group | Order | Common | count |
|---|---|---|---|
Ammonitida |
16 | ||
Nautilida |
3 | ||
Oncocerida |
1 | ||
Sepiida |
Cuttlefish | 2 | |
zNone |
1 |
>Order: Ammonitida
Formation: Ozan
Fannin County | NS-403
Formation: Eagle Ford/Atco
Ellis County | MID-810
Formation: Austin Chalk
Travis County | 60
Formation: Del Rio
Mclennan County | M1-11
Formation: Buda
Williamson County | 61
Formation: Ozan
Fannin County | NS-693
Formation: Ozan
Fannin County | NS-401
Formation: Austin Chalk
Travis County | 15
Formation: Austin Chalk
Williamson County | W1-488
Formation: Austin Chalk
Travis County | T3-122
Formation: Austin Chalk
Williamson County | W1-492
Formation: Ozan
Fannin County | NS-692
Formation: Austin Chalk
Travis County | T3-123
Formation: Austin Chalk
Travis County | 18
Formation: Glen Rose
Hays County | 381
Formation: Del Rio
Mclennan County | M1-12
>Order: Nautilida
Formation: GrahamThrifty
Jack County | J1-526
Formation: GrahamThrifty
Jack County | J1-527
Formation: GrahamThrifty
Jack County | J1-524
>Order: Oncocerida
Formation: GrahamThrifty
Jack County | J1-783
>Order: Sepiida
Formation: Stone City
Burleson County | WB-358
Formation: Stone City
Burleson County | WB-360
>Order: zNone
Formation: Other
Williamson County | W2-770
Cretaceous Atlas of Antient Life
| Period | Formation | count |
|---|---|---|
| Cretaceous | Austin Chalk | 7 |
| Cretaceous | Buda | 1 |
| Cretaceous | Del Rio | 2 |
| Cretaceous | Eagle Ford/Atco | 1 |
| Cretaceous | Glen Rose | 1 |
| Cretaceous | Other | 1 |
| Cretaceous | Ozan | 4 |
| Eocene | Stone City | 2 |
| Pennsylvanian | GrahamThrifty | 4 |