[1] Fossils have been recovered in the Neuquén province of Patagonia and were originally assigned to the Portezuelo Formation but further research showed that these layers belong to the Plottier Formation.

[3] The name Muyelensaurus first appeared in a 2007 paper by Argentine paleontologists Jorge Calvo of the Universidad Nacional del Comahue and Bernardo González Riga of the Laboratorio de Paleovertebrados, and Brazilian paleontologist Juan Porfiri of the Universidade Federal do Rio de Janeiro.

[1] The cladogram below follows Franca et al. (2016), placing Muyelensaurus as a basal lithostrotian.

[4] Malawisaurus Muyelensaurus Nemegtosaurus Tapuiasaurus Rapetosaurus Diamantinasaurus Baurutitan Isisaurus Alamosaurus Opisthocoelicaudia Neuquensaurus Saltasaurus Maxakalisaurus Panamericansaurus Rinconsaurus Gondwanatitan Aeolosaurus maximus Aeolosaurus colhuehuapensis Aeolosaurus rionegrinus The cladogram below follows Mocho et al. (2019), this time placing Muyelensaurus within Rinconsauria.

[5] Malawisaurus Paludititan Lohuecotitan Epachthosaurus Alamosaurus Opisthocoelicaudia Neuquensaurus Rocasaurus Saltasaurus Lirainosaurus Atsinganosaurus Ampelosaurus Bonatitan Rapetosaurus Nemegtosaurus Gondwanatitan Aeolosaurus Rinconsaurus Muyelensaurus Bonitasaura Mendozasaurus Futalognkosaurus