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  Genus

  In biology, a genus (plural: genera) is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia. Genera and higher taxonomic levels such as families are used in biodiversity studies, particularly in...
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  Hybrid

  In biology and specifically, genetics, the term hybrid has several meanings, all referring to the offspring of sexual reproduction. From a taxonomic perspective, hybrid refers to offspring resulting from the interbreeding between two animals or plants of different species. According to the Oxford...
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  Kingdom

  In biology, kingdom (Latin: regnum, pl. regna) is a taxonomic rank, which is either the highest rank or in the more recent three-domain system, the rank below domain. Kingdoms are divided into smaller groups called phyla (in zoology) or divisions in botany. The complete sequence of ranks is life,...
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  Family

  In biological classification, family (Latin: familia) is What does and does not belong to each family is determined by a taxonomist. Similarly for the question if a particular family should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different...
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  Class

  In biological classification, class (Latin: classis) is The composition of each class is determined by a taxonomist. Often there is no exact agreement, with different taxonomists taking different positions. There are no hard rules that a taxonomist needs to follow in describing a class, but for...
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  Order

  In scientific classification used in biology, the order (Latin: ordo) is What does and does not belong to each order is determined by a taxonomist. Similarly for the question if a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking...
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  Division

  Division is a taxonomic rank in biological classification. In botany and mycology, division refers to a rank equivalent to phylum. The use of either term is allowed under the International Code of Botanical Nomenclature, and both are commonly used in scientific literature. The main divisions of...
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  Phylum

  In biology, a phylum (English pronunciation: /ˈfaɪləm/; plural: phyla) is a taxonomic rank below kingdom and above class. "Phylum" is equivalent to the botanical term division. The kingdom Animalia contains approximately 35 phyla; the kingdom Plantae contains 12 divisions. Current research in...
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  Domain

  In biological taxonomy, a domain (also superregnum, superkingdom, empire, or regio) is the highest taxonomic rank of organisms, higher than a kingdom. According to the three-domain system of Carl Woese, introduced in 1990, the Tree of Life consists of three domains: Archaea, Bacteria and Eukarya....
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  Tribe

  In biology, a tribe is a taxonomic rank between family and genus. It is sometimes subdivided into subtribes. Some examples include the tribes Caprini, Acalypheae, Hominini, Bombini, and Antidesmeae.