A stage (48.6–40.4 Ma ago) in the Middle Eocene sub-epoch, preceded by the Ypresian (Early Eocene), followed by the Bartonian (Int. Commission on Stratigraphy, 2004). It is roughly contemporaneous with the upper Ulatisian and lower Narizian (N. America), the upper Heretaungan and lower Bortonian (New Zealand), and the upper Johannian and lower Aldingan (Australia).