plosone-phylo
pone.0014572.g016
Evolutionary history of the acquisition of sacral vertebrae (above) and body size (below) in basal Sauropodomorpha.
Colored boxes and lines on the terminal taxa and branches represent the optimization of the type of sacrum among basal sauropodomorphs. Autapomorphic additions of sacral elements are marked with asterisks (see text for explanation). The curves plotted below the cladogram represent the range of estimated body size (y-axis) in sauropodomorph nodes leading to eusauropods (x-axis). Ancestral reconstructions of body mass are based on femoral lateromedial width (FML; see [69] and Appendix S1 for further data and methods). The terminal ‘Eusauropods’ represents forms more derived than the basal eusauropod Shunosaurus, some of which have further increased the sacral count [43], [60].
pone.0014572.g016
Evolutionary history of the acquisition of sacral vertebrae (above) and body size (below) in basal Sauropodomorpha.
Colored boxes and lines on the terminal taxa and branches represent the optimization of the type of sacrum among basal sauropodomorphs. Autapomorphic additions of sacral elements are marked with asterisks (see text for explanation). The curves plotted below the cladogram represent the range of estimated body size (y-axis) in sauropodomorph nodes leading to eusauropods (x-axis). Ancestral reconstructions of body mass are based on femoral lateromedial width (FML; see [69] and Appendix S1 for further data and methods). The terminal ‘Eusauropods’ represents forms more derived than the basal eusauropod Shunosaurus, some of which have further increased the sacral count [43], [60].