[2] In 2010, Rubén D. Juárez Valieri and his team erected a new genus and hadrosaurid species called Willinakaqe salitralensis from different materials found in 2 different locations (Salitral Moreno and Islas Malvinas) of the Allen Formation,[3] which are mostly housed in the collection of the Carlos Ameghino Provincial Museum, where the specimen was examined by Powell, and was made the paratype of this new genus, in addition to the holotype of Lapampasaurus as material attributed to W. salitralensis from the second locality and housed in the Provincial Museum of Natural History, in the province of La Pampa.

[4] Later, the Spanish paleontologist Penélope Cruz-Caballero and the Argentine Rodolfo Coria reviewed the material attributed to the genus Willinakaqe in 2016, where they concluded that fossils may represent more than one taxon of hadrosaurid and that the characteristics used in the diagnosis would not be valid.

[5] In a 2017 study, Cruzado-Caballero and Powell (who died before the paper was published) reassigned the paratype of W. salitralensis to its own genus and species, Bonapartesaurus rionegrensis, converting the former into a chimera of different hadrosaurids, and hence, an invalid name.

[1] All the material present was extracted from the Salitral Moreno site of the Río Negro province in southern Argentina, from the lower member of the Allen Formation, which dates to the Late Cretaceous (Campanian to Maastrichtian).

[6] The first phylogenetic analysis of Bonapartesaurus followed Paul Sereno's definition for Hadrosauridae from 1998,[7] in addition to using the traditional classification of Hadrosaurinae (prior to the consensus of Prieto-Marquez in 2010[8]), which includes all non-crested hadrosaurids along with the fragmentary genus Hadrosaurus within the same subfamily.