The entire concept of the phylogenetic tree (http://en.wikipedia.org/wiki/Phylogenetic_tree http://en.wikipedia.org/wiki/Phylogenetic_tree) is based on the idea

The entire concept of the phylogenetic tree (http://en.wikipedia.org/wiki/Phylogenetic_tree http://en.wikipedia.org/wiki/Phylogenetic_tree) is based on the idea of speciation. That species evolve into new species is well accepted in evolutionary theory, and well supported.