Museu Nacional d'Art de Catalunya | Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa | Museu d'Art Contemporani de Barcelona | The avenue on a summer day with Museu Nacional d'Art de Catalunya | Museu Nacional de Belas Artes | Museu d'Història de Barcelona | Museu Barbier-Mueller d'Art Precolombí |
Guaibasaurus was originally named on the basis of the holotype, MCN PV2355, a well-preserved partial postcranial skeleton and the paratype, MCN PV2356, an articulated and nearly complete left hindlimb, which were discovered in the "Sesmaria do Pinhal 2" locality near Candelária, Rio Grande do Sul, in Brazil, in the geopark of Paleorrota.