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Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme of classes (a taxonomy) and the allocation of things to the classes (classification).
In biology, taxonomy (from Ancient Greek τάξις () 'arrangement' and -νομία () 'method') is the scientific study of naming, defining (circumscribing) and classifying groups of biological organisms based on shared characteristics.
There is an indeterminate number of ranks, as a taxonomist may invent a new rank at will, at any time, if they feel this is necessary. In doing so, there are some restrictions, which will vary with the nomenclature code that applies. [citation needed]
What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order.
Human taxonomy is the classification of the human species within zoological taxonomy. The systematic genus, Homo, is designed to include both anatomically modern humans and extinct varieties of archaic humans.
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Plant taxonomy is the science that finds, identifies, describes, classifies, and names plants.It is one of the main branches of taxonomy (the science that finds, describes, classifies, and names living things).
Scott Thomson (born 1966), Australian taxonomist and palaeontologist (turtles). Generally abbreviated as S. Thomson; Thomas Thomson (1817–1878), British physician and botanist - Thomson is his official botanical author abbreviation according to IPNI