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On the Other "Phylogenetic Systematics".

Kevin C Nixon1, James M Carpenter2

  • 1Bailey Hortorium, Cornell University, Ithaca, New York, 14853.

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|December 14, 2021
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Summary
This summary is machine-generated.

This study critiques a proposed "Phylogenetic Systematics" approach, arguing its "node-pointing" method is less stable than the traditional Linnaean System for biological classification.

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Area of Science:

  • Systematic Biology
  • Taxonomy
  • Phylogenetics

Background:

  • A recent serial paper by De Queiroz and Gauthier critiques the current state of biological taxonomy.
  • They argue that prevailing taxonomist beliefs are archaic and that many practitioners are essentialists.
  • The paper advocates for abandoning current nomenclature for a new system based on "Phylogenetic Systematics".

Purpose of the Study:

  • To evaluate the stability of the proposed "node-pointing" system in Phylogenetic Systematics.
  • To compare the stability of "node-pointing" with the existing Linnaean System of nomenclature.
  • To demonstrate that the proposed system is less stable than the current Linnaean System.

Main Methods:

  • Analysis of the theoretical framework of "Phylogenetic Systematics" as presented by De Queiroz and Gauthier.
  • Examination of provided examples to assess the claimed stability of "node-pointing".
  • Application of a rational method to measure the net change in taxa under different classification systems.

Main Results:

  • The paper argues that the proposed "node-pointing" system lacks specific rules and relies on vague assertions like "clades are individuals."
  • Examples provided in the original paper demonstrate that "node-pointing" is less stable than claimed.
  • The study shows that the "node-pointing" system is less stable than the Linnaean System when stability is measured by changes in included taxa.

Conclusions:

  • The proposed "Phylogenetic Systematics" approach, particularly its "node-pointing" method, is less stable than the existing Linnaean System.
  • The "node-pointing" system is detached from empirical evidence, usage, and group composition, leading to instability.
  • The current Linnaean System offers greater rational stability for biological classification compared to the proposed alternative.