Introduction--development and phylogeny of the arthropods: Darwin's legacy.

In the present essay, I first recall the genealogical concept of classification settled by Charles Darwin in the "Origin of Species". Darwin tightly linked what we now call phylogeny and development. He often insisted to take into account embryonic and larval characters, most often using as examples his favourite animals, the cirripedes. Then I discuss remaining problems, and also perspectives, to address the link between phylogeny and development in the modern terms of molecular and cladistic phylogenetics and of molecular and genetic developmental biology.