Investigating developmental evolution usually requires comparing differences across related species to infer how phenotypic change results from embryological modifications. However, when comparing organisms from different environments, ecologies, and

Investigating developmental evolution usually requires comparing differences across related species to infer how phenotypic change results from embryological modifications. However, when comparing organisms from different environments, ecologies, and

Streblospio benedicti is a common marine annelid that has become an important model for developmental evolution. It is the only known example of poecilogony (where two distinct developmental modes occur within a single species) that is due to a heritable