A European stage (326.4–315 Ma ago) in the Silesian epoch, underlain by the Dinantian, overlain by the Westphalian, and subdivided into Namurian A, B, and C. It is dated at 326.4–315 Ma ago and is contemporaneous with the Millstone Grit series (western Europe) and the Serpukhovian and Lower Bashkirian series (eastern Europe).