Identification is not classification

Identification is not classification - = species, family,...

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Identification is not classification . Identification is to place an individual into an already existing classification scheme. Classification is to assemble groups into larger groups. There are conflicting goals of systematics: static classification of organisms into pigeon holes for easy reference; but this should reflect a dynamic history of common descent = phylogeny . A systematic solution to the problem of diversity incorporates both of these goals, but this result is not always easily obtained. Terminology: Taxon (taxa) = a group of organisms of any taxonomic rank that is sufficiently distinct to be worthy of being assigned to a definite category. Category = rank or level in hierarchic classification. Taxa = robin, thrushes, songbirds, birds, vertebrates, animals Categories
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Unformatted text preview: = species, family, suborder, class, subphylum, kingdom How do you classify? Historically: Downward classification by logical division. Analogous to "20 questions". In Aristotle's time things were either animals or plants. One could start by asking oneself: is this an animal or a plant? Does this have feathers or not? and so on down until it was properly placed in its category. Linnaeus believed in the reality of the genus. He used downward classification through his Linnaean hierarchy (kingdom, phylum, class, order, family, genus, species [recall: King Philip Came Over From Germany Speaking]) to reach the genus and then make the final division into the appropriate species. This approach lead to the Binomial nomenclature : Genus + species: Homo sapiens, etc....
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