Movie 1.

Cell shape transitions along the central cell trajectory. Video shows a sampling of cell segmentation data along the trajectory inferred for central layer cells at the 40–60% AP level of the notochord. (Left) Segmented cells in anterior and lateral views, as stated. (Right) All 40–60% central layer cells embedded in morphospace against PC1 and PC2, colour-coded by somite stage. Blue diamond shows position of cell illustrated in panels on left.