Type
Age
Age range
443.1–440.5 Ma
Silurian
Llandovery
Aeronian
Rhuddanian
Ordovician
Late Ordovician
Hirnantian
Aeronian
Rhuddanian
Bolindian
Aeronian
Rhuddanian
Richmondian-Hirnantian
443.2443.0442.8442.6442.4442.2442.0441.8441.6441.4441.2441.0440.8440.6440.4