 Four specimens are stored at the Universidade Federal do Rio Grande do Sul (UFRGS) in Porto Alegre.The first to be described was UFRGS-PV-0156-T, a massive and well-preserved skull discovered along with most of a vertebral column at the Pascual Sanga outcrop in Candelária.It was originally described by Barberena (1978) and has experienced much discussion as to its relations to the original Munich specimens.