| Name | Age | Stage | Formation | Member | Comment |
|---|---|---|---|---|---|
| Exogyra costata costata
Say, 1820 |
Cretaceous | Maestrichtian | Corsicana Marl | - | - |
| Exogyra costata spinifera
Stephenson, 1941 |
Cretaceous | Maestrichtian | Peedee | upper | Found in North Carolina |
| Exogyra cancellata
Stephenson, 1914 |
Cretaceous | Lower Maestrichtian | Demopolis Chalk | - | Demopolis Type Locality |
| Exogyra ponderosa ponderosa
Roemer 1849 |
Cretaceous | Campanian | Taylor | Sprinkle Clay | - |
| Exogyra tigrina
Stephenson |
Cretaceous | Santonian | Austin Chalk | Dessau Chalk | Found a few cm above the E. laeviuscula layer |
| Exogyra laeviuscula
Roemer |
Cretaceous | Middle Santonian | Austin Chalk | Dessau Chalk | Found a few cm above the E. ponderosa erraticosta |
| Exogyra ponderosa erraticostata
Stephenson, 1914 |
Cretaceous | Middle Santonian | Austin Chalk | Dessau Chalk | Found about 1.5m below Burditt/Dessau contact |
| Exogyra upatoiensis
Stephenson, 1914 |
Cretaceous | Santonian | Eutaw | Tombigbee Sand | upper part of formation |
| Exogyra aquilliana Stephenson |
Cretaceous | Uppermost Cenomanian | Woodbine | - | found with E. columbella
no photo yet |
| Exogyra columbella levis Meek |
Cretaceous | Uppermost Cenomanian | Woodbine | - | found with E. aquilliana (photo blurred) |
| Exogyra whitneyi Bose |
Cretaceous | Upper Cenomanian | Grayson | Upper Marl | Found within 1m of Grayson/Woodbine contact |
| Exogyra clarki Shattuck |
Cretaceous | Upper Cenomanian | Grayson | Upper marl | Found within 1m of Grayson/Woodbine contact |
| Exogyra drakei Cragin |
Cretaceous | Upper Cenomanian | Grayson | Upper marl | Found within 1m of Grayson/Woodbine contact |
| Exogyra olisiponensis Sharpe |
Cretaceous | Middle Cenomanian | Dakota Sandstone | Gryphaea | - |
| Exogyra plexa Cragin |
Cretaceous | Lower Cenomanian | Kiamichi | - | - |
| Exogyra paupercula
Cragin |
Cretaceous | Lower Aptian | Glen Rose | Unit 4 (Barnes, Austin West quad) |
- |
| Exogyra guadalupe n. sp. - |
Cretaceous | Lower Aptian | Glen Rose | Unit 2 (Barnes, Austin West quad) |
New Species not E. aquila or E. quitmanensis |
| Exogyra aquila (Brongniart) |
Cretaceous | Upper Aptian | Hensell Sand | - | Found within 1m of Cow Creek/Hensell contact |
| Exogyra cartledgei (?) |
Cretaceous | Upper Aptian | Glen Rose | Basal 15m | Need photo |
