| Name | From | To | Age range |
|---|---|---|---|
| Ammonidium | Early Ordovician | Late Devonian |
|
| Ammonidium aduncum | Tremadocian | Ashgillian |
|
| Ammonidium alloiteauii | Arenigian | Middle Tournaisian |
|
| Ammonidium ballistum | Early Arenigian | Middle Arenigian |
|
| Ammonidium cladum | Aeronian | Middle Siegenian |
|
| Ammonidium cornuatum | Gedinnian | Gedinnian |
|
| Ammonidium encantador | Fronian | Wenlockian |
|
| Ammonidium exoticum | Arenigian | Llanvirnian |
|
| Ammonidium furtivum | Early Arenigian | Early Llandeilian |
|
| Ammonidium garrasinoi | Early Devonian | Early Frasnian |
|
| Ammonidium grosjeanii | Early Cambrian | Famennian |
|
| Ammonidium hamatum | Late Devonian | Late Famennian |
|
| Ammonidium hydraferum | Frasnian | Frasnian |
|
| Ammonidium inornatum | Early Frasnian | Early Frasnian |
|
| Ammonidium iowaensis | Late Givetian | Late Givetian |
|
| Ammonidium juliae | Early Tournaisian | Early Tournaisian |
|
| Ammonidium lewisii | Middle Devonian | Middle Devonian |
|