Figure 4: Macroevolutionary diversity in phalanges, limb, somite and vertebral segment proportions exhibit similar properties.
From: Shared rules of development predict patterns of evolution in vertebrate segmentation

Ternary diagram showing comparative species-level variation in 2,000+ segment proportions in various structures reported in the text. Solid line shows the multivariate regression with 95% confidence interval denoted by the dashed lines.