Name | From | To | Age range |
---|---|---|---|
Alterbia circula | Danian | Late Paleocene |
|
Alterbia microgranulata | Paleocene | Middle Eocene |
|
Alterbia puyangensis | Early Tertiary | Middle Miocene |
|
Alterbia rhombohedra | Early Paleocene | Early Paleocene |
|
Alterbia magnifica | Eocene | Eocene |
|
Alterbia bellula | Early Eocene | Late Eocene |
|
Alterbia bicellula | Early Eocene | Middle Eocene |
|
Alterbia earnleyensis | Early Eocene | Middle Eocene |
|
Alterbia ectorugosa | Late Eocene | Late Eocene |
|
Alterbia mauthei | Nd | Nd |
|
Alterbia jurassica | Nd | Nd |
|