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| Group | Order | Common | count |
|---|---|---|---|
| 1-Protobranchia | Nuculanida |
3 | |
| 1-Protobranchia | Nuculida |
1 | |
| 2-Isofilibranchia | Mytilida |
True Mussels | 3 |
| 3-Pteriomorphia | Arcida |
8 | |
| 3-Pteriomorphia | Pectinida |
Scallops | 14 |
| 3-Pteriomorphia | Pterioida |
17 | |
| 4-Heteroconchia | Cardiida |
12 | |
| 4-Heteroconchia | Carditida |
5 | |
| 4-Heteroconchia | Lucina |
1 | |
| 4-Heteroconchia | Solenida |
1 | |
| 4-Heteroconchia | Trigoniida |
4 | |
| 4-Heteroconchia | Venerida |
9 | |
| 5-Anomalodesmata | Pholadomyoida |
8 | |
zNone |
7 |
>Order: Arcida
Formation: Austin Chalk
Williamson County | W1-670
Formation: Fort Terrett
Kerr County | K1-814
Formation: Glen Rose
Kerr County | K4-827
Formation: Glen Rose
Kerr County | K3-691
Formation: Fort Terrett
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: Cardiida
Formation: Austin Chalk
Williamson County | W1-675
Formation: Glen Rose
Bandera County | B1-712
Formation: Glen Rose
Kerr County | 67
Formation: Comanche Peak
Bell County | BL2-843
Formation: Glen Rose
Kerr County | K4-841
Formation: Fort Terrett
Kerr County | K1-842
Formation: Fort Terrett
Kerr County | K1-53
Formation: Glen Rose
Kerr County | K1-808
Formation: Fort Terrett
Kerr County | K1-825
Formation: Fort Terrett
Kerr County | K1-824
Formation: Fort Terrett
Kerr County | K2-39
Formation: Comanche Peak
Lampasas County | L1-458
>Order: Carditida
Formation: Walnut
Bell County | BL1-836
Formation: Stone City
Burleson County | WB-391
Formation: Bromide
zOK (Carter) County | OK1-620
Formation: GrahamThrifty
Jack County | J1-786
Formation: GrahamThrifty
Jack County | J1-548
>Order: Lucina
Formation: Fort Terrett
Kerr County | K1-815
>Order: Mytilida
Inoperna concentricecostellata
Formation: Walnut
Travis County | T1-847
Formation: Fort Terrett
Kerr County | K1-816
Formation: Fort Terrett
Kerr County | K1-848
>Order: Nuculanida
Formation: GrahamThrifty
Jack County | J1-549
Formation: Barnett Shale
San Saba County | 765
Formation: GrahamThrifty
Jack County | J1-517
>Order: Nuculida
Formation: GrahamThrifty
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: Austin Chalk
Williamson County | W1-776
Formation: Fort Terrett
Kerr County | K1-820
Formation: Buda
Williamson County | W2-643
Formation: Austin Chalk
Williamson County | W1-491
Formation: Buda
Williamson County | W2-19
Formation: Buda
Williamson County | 370
Formation: Austin Chalk
Williamson County | W1-718
Formation: Austin Chalk
Travis County | 331
>Order: Pholadomyoida
Formation: Comanche Peak
Bell County | BL2-835
Formation: Fort Terrett
Kerr County | K1-22
Formation: Glen Rose
Kerr County | K4-822
Formation: Other
zUnknown County | 813
Formation: Walnut
Travis County | T1-844
Formation: Fort Terrett
Kerr County | K1-818
Formation: Fort Terrett
Kerr County | K1-845
Formation: Austin Chalk
Williamson County | W1-495
>Order: Pterioida
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
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: Solenida
Formation: Comanche Peak
Bell County | BL1-840
>Order: Trigoniida
Formation: Buda
Travis County | T2-645
Formation: Fort Terrett
Kerr County | K1-819
Formation: Glen Rose
Kerr County | K5-831
Formation: Glen Rose
Hays County | 382
>Order: Venerida
Formation: Glen Rose
Kerr County | K4-720
Formation: Glen Rose
Kendall County | 47
Formation: Glen Rose
Kerr County | K3-45
Formation: Walnut
Bell County | BL1-828
Formation: Fort Terrett
Kerr County | K1-823
Formation: Glen Rose
Kerr County | K1-817
Formation: Glen Rose
Kerr County | K1-809
Formation: Glen Rose
Bandera County | B1-714
Formation: Glen Rose
Kerr County | K4-721
>Order: zNone
Formation: Austin Chalk
Williamson County | W1-725
Formation: Austin Chalk
Williamson County | W1-674
Formation: Fort Terrett
Kerr County | K1-513
Formation: Austin Chalk
Williamson County | W1-671
Formation: Austin Chalk
Williamson County | W1-684
Formation: GrahamThrifty
Jack County | J1-551
Formation: Fort Terrett
Kerr County | K2-38
| Period | Formation | count |
|---|---|---|
| Cretaceous | Austin Chalk | 17 |
| Cretaceous | Boquillas | 1 |
| Cretaceous | Buda | 6 |
| Cretaceous | Comanche Peak | 7 |
| Cretaceous | Eagle Ford | 2 |
| Cretaceous | Eagle Ford/Atco | 2 |
| Cretaceous | Fort Terrett | 21 |
| Cretaceous | Glen Rose | 20 |
| Cretaceous | Other | 1 |
| Cretaceous | Ozan | 1 |
| Cretaceous | Walnut | 4 |
| Eocene | Stone City | 2 |
| Mississipian | Barnett Shale | 1 |
| Ordivician | Bromide | 1 |
| Pennsylvanian | GrahamThrifty | 7 |