What Are Some Examples of Evo Devo Studies in Histology?

There are numerous examples of Evo Devo studies in histology:

Research on the evolution of the vertebrate eye has revealed how changes in tissue development lead to the complex structure and function of the eye.
Studies on limb development across different species have shown how variations in gene expression and signaling pathways result in diverse limb morphologies.
Investigations into feather and scale formation in birds and reptiles have provided insights into the evolutionary transitions between these two structures.