Developmental constraints

Zalts H and Yanai I. Developmental constraints shape the evolution of the nematode mid-developmental transition. Nature Ecology and Evolution 2017 doi:10.1038/s41559-017-0113 News & Views by Ronald E. Ellis Since the works of Ernst Haeckel and Karl Ernst von Baer in the 19th century, it has been recognized that a stage in mid-embryogenesis is remarkably conserved…