The phylogenetic definition of reptilia.

@article{Modesto2004ThePD,
  title={The phylogenetic definition of reptilia.},
  author={Sean P. Modesto and Jason S. Anderson},
  journal={Systematic biology},
  year={2004},
  volume={53 5},
  pages={
          815-21
        }
}
Naming taxa is an important endeavor in the documentation of life by systematists, whether it is conducted in the context of traditional rank-based classification or within a phylogenetic framework. Proponents of the phylogenetic approach distinguish between the diagnosis of a group and its definition (Ghiselin, 1984; Rowe, 1987, 1988), and this distinction forms the basis for a phylogenetically based method of naming taxa formerly referred to as Phylogenetic Taxonomy (de Queiroz and Gauthier… 

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