ABSTRACT
Nematodes are a highly diverse and very important group of multicellular animals, but their systematics have always been volatile and are currently entering a new phase of turbulence. At the moment of writing this chapter, molecular methods and phylogenetic models are bringing new insights that require significant changes in nematode systematics. To provide an overview at this particular time is therefore both an exciting and impossible challenge, since we can roughly predict the extent of the changes to come, but not yet stipulate their precise form.
