Bivariate plot showing the ratio between the total length and anteroposterior depth of the proximal end of the tibia (L/Pw) concerning the ratio between the total length and anteroposterior depth at mid-length of the tibia (L/Mw). Data was taken from Ezcurra and Apaldetti (2011) and first-hand assessments obtained by ORRF. The convex hulls with solid lines show the morphospace generated by the groups ‘Guaibasauridae’, Massospondylidae, ‘Melanorosauridae’ and Sauropoda. The name 'Melanorosauridae' is here used to refer to sauropodomorphs that are not traditionally considered as sauropods. The triangles represent taxa traditionally considered sauropods, and the stars represent non-sauropod sauropodomorphs. The colours of the points represent the age of the taxa, with purple for the Late Triassic and blue for the Early Jurassic. The dashed convex hull represents the morphospace corresponding to Plateosaurus as currently defined. The yellow convex hull represents the taxa placed in a polytomy before the diversification of Massospondylidae and Sauropodiformes.