Biostratigraphy of the Dinodontosaurus and Santacruzodon AZs.

Tetrapod fossil comparisons and shared taxa with the Chañares Formation of western Argentina. The ages of the column follow Gradstein et al. [36]. The radiometric dating of 236.1, 231.4 and 225.9 Ma on the Ischigualasto-Villa Unión Basin column correspond to the first half of the Chañares Formation [45], the base of the Ischigualasto Formation, and the base of Los Colorados Formation [105], respectively, and the one in the Santacruzodon AZ follows Philipp et al. [43].