The Nexus file from Wedel and Taylor (2013), based on the character-taxon matrix from Whitlock (2011), with constraints applied to test the positions of Haplocanthosaurus and Suuwassea.
REFERENCES
Wedel, M.J., and Taylor, M.P. 2013. Neural spine bifurcation in sauropod dinosaurs of the Morrison Formation: ontogenetic and phylogenetic implications. PalArch's Journal of Vertebrate Palaeontology.
Whitlock, J.A. 2011. A phylogenetic analysis of Diplodocoidea (Saurischia: Sauropoda). Zoological Journal of the Linnean Society 161(4):872-915. doi: 10.1111/j.1096-3642.2010.00665.x