A Silurian conodont zonation from late Llandovery to end Pridoli in Sardinia

The standard Late Llandovery - Top Pridoli conodont zonation between the top of the celloni Zone and the latest Pridoli detorta Zone is revised on the basis of data from the Silurian System of Sardinia. Fifteen biointervals have been recognized; among them, one zone is here newly named (Oz. exc. hamata) and three more zones (K. crassa, K. v. variabilis interval Zone and Pe. latialata), proposed and sporadically used in some previous biozonations, are reintroduced. The scheme provided for Sardinia fits well in other part of the world, like the Cellon section.