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Speciation, the formation of new and distinct species in the course of evolution. Speciation involves the splitting of a single evolutionary lineage into two or more genetically independent lineages.
The idea that evolution is very slow, takes millions of years (for speciation), etc. is not really addressed by this model directly, but is indirectly. Indirectly what we see here is the fallacy of equating evolutionary change with speciation.peciation is important and it is a kind of evolutionary event, but if you want to talk about the rate of speciation, then call it the ârate of speciationâ not the ârate of evolution.â They are not the same thing. Not addressed in this model is the simple fact that speciation does NOT take millions of years.