On the origin of prokaryotic species.

  title={On the origin of prokaryotic species.},
  author={W. Ford Doolittle and Olga Zhaxybayeva},
  journal={Genome research},
  volume={19 5},
The notion that all prokaryotes belong to genomically and phenomically cohesive clusters that we might legitimately call "species" is a contentious one. At issue are (1) whether such clusters actually exist; (2) what species definition might most reliably identify them, if they do; and (3) what species concept -- by which is meant a genetic and ecological theory of speciation -- might best explain species existence and rationalize a species definition, if we could agree on one. We review… CONTINUE READING
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