Figure 8 in Development and evolution of regionalization within the avian axial column

Figure 8. Schematic of ossification and fusion sequence of the developing chicken axial column. Shading indicates degree of ossification of all scored anatomies within each vertebral segment, given in Supporting Information, Table S1. Fusions between adjacent vertebrae are indicated with black outlines. Note that the lumbosacrals begin fusions from two regions that remain separate until stage 42.