| Name | From | To | Age range |
|---|---|---|---|
| Aremoricanium deflandrei | Early Paleozoic | Early Caradocian |
|
| Aremoricanium decoratum | Arenigian | Caradocian |
|
| Aremoricanium cylindrosum | Middle Ordovician | Llandeilian |
|
| Aremoricanium carolineae | Middle Ordovician | Middle Ordovician |
|
| Aremoricanium | Ordovician | Silurian |
|