I think species can be paraphyletic. If we sent a family of llamas into outer space and they evolved into Space Llamas, there would be no common ancestor which included all terrestrial _L. glama_s but excluded L. astrollama.
I think species can be paraphyletic. If we sent a family of llamas into outer space and they evolved into Space Llamas, there would be no common ancestor which included all terrestrial _L. glama_s but excluded L. astrollama.