Ammonoids of the Oxynotum Zone and Raricostatum Zone (Densinodulum Subzone) of Sinemurian, Lower Jurassic, in the Asturian and Lusitanian basins

1. Vitón, Í.
2. Comas-Rengifo, M.J.
3. Duarte, L.V.
4. Goy, A.