Published online by Cambridge University Press: 08 August 2009
Since its inception in the early 1980s, evo-devo has evolved into a mature discipline. This is manifest in the naming of research groups, scientific journals and books, professional meetings and societies. Despite such formal attributes of a scientific discipline it is often unclear what constitutes its conceptual distinctiveness. Does evo-devo have its own set of specific questions and research methods? Does it solve biological problems that cannot be solved by other approaches? And does it represent a significant change in the theoretical understanding of development and evolution? That is, in which way do the goals, the empirical programs and the theories of evo-devo research differ from those of neighbouring disciplines such as developmental biology or evolutionary biology? The present chapter provides a concise overview of the current status of evo-devo as a discipline. This requires a short reflection on its history.
CONCEPTUAL FOUNDATIONS
The parallels between embryonic stages and the ‘scale of beings’ had already been contemplated in pre-Darwinian times, and the foundation of a scientific theory of evolution was significantly influenced by embryological arguments. Darwin called embryology ‘by far the strongest single class of facts in favour of a change of form’, and his first sketches of a phylogenetic tree seem to have been inspired by tree-like renderings of embryological differences between species (Richards 1992). Much of the early work in evolutionary biology focused on the uses of embryonic characters for taxonomical purposes.
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