The Leonian stage (early Middle Cambrian): a unit for Cambrian correlationin the Mediterranean subprovince

The Leonian (early Middle Cambrian) regional Stage of Iberia is revised fro m a lithostratigraphic and biostratigraphic point of view in order to propo se it as a chronostratigraphic unit for the Mediterranean subprovince (outc rops in Spain, France, Italy, Germany, Morocco and Turkey). This revision n ow permits a correlation of the Leonian Stage with the other early Middle C ambrian regional Stages. For this correlation the first appearance datum (F AD) of Eoparadoxides mureroensis, Macannaia spp., Schistocephalus antiquus and Oryctocara granulata are employed for the lower boundary; while the FAD s of Badulesia tenera, Ctenocephalus (Hartella) spp., Parasolenopleura acul eata and Triplagnostus gibbus are employed for the upper boundary.