AGE CONSTRAINTS ON THE PORTEZUELO DEL TONTAL FORMATION (MIDDLE–UPPER ORDOVICIAN) OF THE WESTERN ARGENTINE PRECORDILLERA: FIRST INSIGHTS FROM CONODONT BIOSTRATIGRAPHY. Ameghiniana, [S. l.], v. 57, n. 4, p. 344–353, 2020. DOI: 10.5710/AMGH.26.03.2020.3296. Disponível em: https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/3296. Acesso em: 5 oct. 2025.