[1] The type species is Blasisaurus canudoi, described in 2010 by Penélope Cruzado-Caballero, Xabier Pereda-Suberbiola and José Ignacio Ruiz-Omeñaca, a group of researchers from Spain.

Its describers identified two distinct features: the cheekbone has a rear projection with a hook-shaped upper edge and the lower sleep window[clarification needed] is narrow and D-shaped.

[1] Blasisaurus' discoverers performed an exact cladistic analysis to determine its phylogenetic position, which placed it as the sister taxon to Arenysaurus.

[1] Blasisaurus confirmed the hypothesis that, in the Late Cretaceous, different hadrosaurids from Asia and Europe migrated across land bridges.

[3] Below is the most recent cladogram including Blasisaurus and Arenysaurus, published by Penélope Cruzado-Caballero et al. in 2013:[3] Gryposaurus notabilis Aralosaurus tuberiferus Pararhabdodon isonensis Tsintaosaurus spinorhinus Jaxartosaurus aralensis Amurosaurus riabinini Sahaliyania elunchunorum Charonosaurus jiayinensis Blasisaurus canudoi Arenysaurus ardevoli Parasaurolophus cyrtocristatus Parasaurolophus tubicen Parasaurolophus walkeri Lambeosaurus magnicristatus Lambeosaurus lambei Velafrons coahuilensis Hypacrosaurus altispinus Hypacrosaurus stebingeri Olorotitan arharensis Corythosaurus casuarius