| Name | From | To | Age range |
|---|---|---|---|
| Charlesdowniea | Early Eocene | Early Eocene |
|
| Charlesdowniea aculeata | Early Eocene | Early Eocene |
|
| Charlesdowniea clathrata | Late Paleocene | Oligocene |
|
| Charlesdowniea coleothrypta | Maastrichtian | Chattian |
|
| Charlesdowniea columna | Maastrichtian | Early Oligocene |
|
| Charlesdowniea crassiramosa | Late Paleocene | Rupelian |
|
| Charlesdowniea edwardsii | Early Eocene | Middle Eocene |
|
| Charlesdowniea fasciata | Late Ypresian | Lutetian |
|
| Charlesdowniea fusiformis | Early Oligocene | Early Oligocene |
|
| Charlesdowniea limitata | Late Eocene | Rupelian |
|
| Charlesdowniea marginata | Late Eocene | Oligocene |
|
| Charlesdowniea ovalis | Middle Eocene | Middle Eocene |
|
| Charlesdowniea reticulata | Early Eocene | Bartonian |
|
| Charlesdowniea rhomboidalis | Middle Eocene | Middle Eocene |
|
| Charlesdowniea sp | Late Ypresian | Early Oligocene |
|
| Charlesdowniea stellata | Early Eocene | Late Eocene |
|
| Charlesdowniea tenuivirgula | Early Eocene | Priabonian |
|