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| Group | Order | Common | count |
|---|---|---|---|
| Heteroconchia | Carditida |
2 | |
| Heteroconchia | Imparidentia |
10 | |
| Heteroconchia | Modiomorphida |
1 | |
| Heteroconchia | Poromyida |
2 | |
| Heteroconchia | Solenida |
1 | |
| Heteroconchia | Trigoniida |
2 | |
| Heteroconchia | Venerida |
1 | |
| Protobranchia | Nuculanida |
2 | |
| Protobranchia | Nuculida |
1 | |
| Pteriomorphia | Arcida |
5 | |
| Pteriomorphia | Limida |
1 | |
| Pteriomorphia | Myalinida |
9 | |
| Pteriomorphia | Pectinida |
Scallops | 14 |
Imparidentia |
1 | ||
Pterioida |
1 | ||
zNone |
6 |
>Order: Arcida
Formation: Austin Chalk
Williamson County | W1-670
Formation: Edwards Limestone
Kerr County | K2-40
Formation: Austin Chalk
Williamson County | W1-687
Formation: Glen Rose
Bandera County | B2-726
Formation: Austin Chalk
Williamson County | W1-673
>Order: Carditida
Formation: Finnis Shale
Jack County | J1-548
Formation: Stone City
Burleson County | WB-391
>Order: Imparidentia
Formation: Austin Chalk
Williamson County | W1-675
Formation: Glen Rose
Kerr County | 67
Formation: Glen Rose
Kendall County | 47
Formation: Glen Rose
Kerr County | K3-45
Formation: Glen Rose
Bandera County | B1-714
Formation: Glen Rose
Kerr County | K4-720
Formation: Glen Rose
Bandera County | B1-712
Formation: Glen Rose
Kerr County | K3-713
Formation: Edwards Limestone
Kerr County | K1-53
Formation: Edwards Limestone
Kerr County | K2-39
Formation: Comanche Peak
Lampasas County | L1-458
>Order: Limida
Formation: Buda
Williamson County | 686
>Order: Modiomorphida
Formation: Bromide
zOK (Carter) County | OK1-620
>Order: Myalinida
Formation: Austin Chalk
Williamson County | W1-490
Formation: Boquillas
Brewster County | 168
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
>Order: Nuculanida
Formation: Finnis Shale
Jack County | J1-549
Formation: Finnis Shale
Jack County | J1-517
>Order: Nuculida
Formation: Finnis Shale
Jack County | J1-547
>Order: Pectinida
Formation: Eagle Ford
Williamson County | 79
Formation: Glen Rose
Kerr County | K5-729
Formation: Glen Rose
Kerr County | K5-727
Formation: Glen Rose
Kerr County | K5-728
Formation: Stone City
Burleson County | WB-392
Formation: Buda
Travis County | T2-646
Formation: Buda
Williamson County | W2-643
Formation: Austin Chalk
Williamson County | W1-491
Formation: Buda
Williamson County | W2-19
Formation: Walnut
Travis County | T1-174
Formation: Austin Chalk
Travis County | T3-333
Formation: Buda
Williamson County | 370
Formation: Austin Chalk
Williamson County | W1-718
Formation: Austin Chalk
Travis County | 331
>Order: Poromyida
Formation: Austin Chalk
Williamson County | W1-495
Formation: Glen Rose
Kerr County | K3-691
>Order: Pterioida
Formation: Finnis Shale
Jack County | J1-551
>Order: Solenida
Formation: Edwards Limestone
Kerr County | K1-22
>Order: Trigoniida
Formation: Buda
Travis County | T2-645
Formation: Glen Rose
Hays County | 382
>Order: Venerida
Formation: Glen Rose
Kerr County | K4-721
>Order: zNone
Formation: Austin Chalk
Williamson County | W1-725
Formation: Austin Chalk
Williamson County | W1-674
Formation: Edwards Limestone
Kerr County | K1-513
Formation: Austin Chalk
Williamson County | W1-671
Formation: Austin Chalk
Williamson County | W1-684
Formation: Edwards Limestone
Kerr County | K2-38
| Period | Formation | count |
|---|---|---|
| Cretaceous | Austin Chalk | 17 |
| Cretaceous | Boquillas | 1 |
| Cretaceous | Buda | 6 |
| Cretaceous | Comanche Peak | 1 |
| Cretaceous | Eagle Ford | 2 |
| Cretaceous | Eagle Ford/Atco | 2 |
| Cretaceous | Edwards Limestone | 6 |
| Cretaceous | Glen Rose | 14 |
| Cretaceous | Ozan | 1 |
| Cretaceous | Walnut | 1 |
| Eocene | Stone City | 2 |
| Ordivician | Bromide | 1 |
| Pennsylvanian | Finnis Shale | 5 |