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#phenetic

2 public questions tagged with this topic.

Classification Basic

Phenetic classification was proposed by

Phenetics quantitative numerical method formalized by Robert Sokal and Peter Sneath in Principles of Numerical Taxonomy 1963 advocating equal weighting of many phenotypic characters and mathematical clustering. Bentham Hooker authored natural system Genera Plantarum 1862-1883, Darwin Wallace natural selection theory 1858-1859, Huxley Strickland nomenclatural rules. Sokal Sneath introduced computational algorithms into taxonomy initiating era of computer systematics. Methodology emphasized operational taxonomic units OTUs and phenetic distance coefficients like Jaccard, laying foundation for later cladistics critique regarding polarity and establishing phenetics versus cladistics debate central to systematics history.

Ref: Sokal & Sneath Principles Numerical Taxonomy 1963; Pankhurst Taxonomic Computing

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Classification Basic

Phenetic classification is also known as

Phenetic classification groups organisms based on overall observable phenotypic similarity calculated from numerous characters without weighting evolutionary significance or distinguishing ancestral versus derived states, alternative name numerical taxonomy or taximetrics because similarity indices and clustering algorithms quantitatively aggregate data into phenograms. Natural encompasses maximal characters qualitatively but with intuitive weighting, artificial few conspicuous, practical economic utility. Numerical taxonomy developed by Sokal and Sneath using operational taxonomic units OTUs scoring character states and UPGMA clustering. Phenetics produces phenogram reflecting resemblance not necessarily phylogeny, controversial for ignoring cladistic polarity, yet useful for bacterial fungal alpha taxonomy where phylogeny unclear.

Ref: Sneath & Sokal Numerical Taxonomy phenetic; Stuessy Plant Taxonomy numerical classification

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