Figure 4. 1, Helminthorhaphe isp. Cerro Colorado Formation. Positive hyporelief / hiporelieve positivo. 2, Megagrapton submontanum. Punta Torcida Formation. Positive hyporelief / hiporelieve positivo. 3, Nereites isp. Cabo San Pablo beds. Positive epirelief / epirelieve positivo. 4, Ophiomorpha rudis (Or) and Ophiomorpha annulata (Oa). Cerro Colorado Formation. Dense association at the sole of a sandstone bed / asociación densa en la base de un banco de arenisca. 5, Paleodictyon strozzi. Cerro Colorado Formation. Positive hyporelief / hiporelieve positivo. 6, Paleodictyon maximum. Punta Torcida Formation. Positive hyporelief / Hiporelieve positivo. 7, Paleodictyon majus. Cerro Colorado Formation. Positive hyporelief / hiporelieve positivo. 8, Paleodictyon minimum. Cabo San Pablo beds. Positive hyporelief / hiporelieve positivo. 9, Paradictyodora antarctica. Leticia Formation. Upper bedding plane view of a sandstone bed with two specimens / vista en planta de la parte superior de un banco de arenisca con dos especímenes. 10, Scolicia strozzi. Cabo San Pablo beds. Positive hyporelief / hiporelieve positivo. 11, Scolicia prisca. Cabo San Pablo beds. Negative epirelief / epirelieve negativo. Scale bar: 1cm. Field phothographs / escala: 1 cm. Fotografías de campo.