Anuran limbs reflect microhabitat and distal, later-developing bones are more evolutionarily labile

Natasha Stepanova & Molly C. Womack
Tetrapod limbs have been used as a model system to investigate how selective pressures and constraints shape morphological evolution. Anurans have had many independent transitions to various microhabitats, allowing us to dissect how these factors influence limb morphology. Furthermore, anurans provide a unique system to test the generality of developmental constraints proposed in mammals, namely that later-developing limb bones are under less constraint and show more variation. We used micro-computed tomography scans of 236 species...
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