Name | From | To | Age range |
---|---|---|---|
Quadraeculina canadensis | Mesozoic | Early Cretaceous |
|
Quadraeculina callaeformis | Late Triassic | Liassic |
|
Quadraeculina bitorosa | Late Triassic | Early Jurassic |
|
Quadraeculina apertus | Middle Callovian | Middle Callovian |
|
Quadraeculina annulata | Rhaetian | Liassic |
|
Quadraeculina anellaeformis | Permian | Early Pleistocene |
|
Quadraeculina | Late Triassic | Early Albian |
|