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Class: Gastropoda
| Order | Family | Common | count |
|---|---|---|---|
| Caenogastropoda | Cerithiidae |
Cerithiids | 3 |
| Caenogastropoda | Goniasmatidae |
1 | |
| Caenogastropoda | Turritellidae |
Tower Shells | 7 |
Formation: Comanche Peak
Williamson County | 9
Formation: Walnut
Bell County | BL1-834
Formation: Georgetown
Williamson County | W3-1010
Formation: Mineral Wells
Palo Pinto County | MW-437
Formation: Stone City
Burleson County | WB-91
Formation: Austin Chalk
Williamson County | W1-641
Formation: Buda
Williamson County | W2-581
Formation: Eagle Ford/Atco
Grayson County | PO-600
Formation: Buda
Williamson County | W2-17
Formation: Comanche Peak
Bell County | BL2-923
Formation: Glen Rose
Travis County | 1023
