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| Group | Order | Common | count |
|---|---|---|---|
Cyclostomata |
1 | ||
Fenestrida |
1 | ||
Rhabdomesida |
1 | ||
Trepostomida |
2 | ||
zNone |
7 |
>Order: Cyclostomata
Formation: Bromide
zOK (Carter) County | OK1-799
>Order: Fenestrida
Formation: GrahamThrifty
Jack County | J1-535
>Order: Rhabdomesida
Formation: GrahamThrifty
Jack County | J1-531
>Order: Trepostomida
Formation: Bromide
zOK (Carter) County | OK1-616
Formation: GrahamThrifty
Jack County | J1-523
>Order: zNone
Formation: Bromide
zOK (Carter) County | OK1-654
Formation: Bromide
zOK (Carter) County | OK1-655
Formation: Eagle Ford/Atco
Grayson County | PO-601
Formation: Bromide
zOK (Carter) County | OK1-625
Formation: Bromide
zOK (Carter) County | OK1-656
Formation: Moran
Eastland County | 452
Formation: Mineral Wells
Palo Pinto County | MW-429
| Period | Formation | count |
|---|---|---|
| Cretaceous | Bromide | 1 |
| Cretaceous | Eagle Ford/Atco | 1 |
| Ordivician | Bromide | 5 |
| Pennsylvanian | GrahamThrifty | 3 |
| Pennsylvanian | Mineral Wells | 1 |
| Permian | Moran | 1 |