Order (taxonomy)
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Template:DMCA Order (Template:Langx) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. Like the other ranks, orders reflect shared ancestry; for example, all owls belong to the order Strigiformes. In biological classification systems, orders and their usage are defined by nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order.
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. Some taxa are accepted almost universally, while others are recognized only rarely.[1]
The name of an order is usually written with a capital letter.[2] For some groups of organisms, their orders may follow consistent naming schemes. Orders of plants, fungi, and algae use the suffix Script error: No such module "Lang". (e.g. Dictyotales).[3] Orders of birds and fishes[4] use the Latin suffix Script error: No such module "Lang". meaning 'having the form of' (e.g. Passeriformes), most orders of insects use the suffix Script error: No such module "Lang". meaning 'wing', but orders of mammals, reptiles, amphibians and invertebrates are not so consistent (e.g. Artiodactyla, Anura, Crocodylia, Actiniaria, Primates).
Hierarchy of ranks
Zoology
For some clades covered by the International Code of Zoological Nomenclature, several additional classifications are sometimes used, although not all of these are officially recognized.
| Name | Latin prefix | Examples |
|---|---|---|
| Magnorder | magnus, 'large, great, important' | Boreoeutheria, Atlantogenata |
| Superorder | super, 'above' | Euarchontoglires, Laurasiatheria, Afrotheria |
| Grandorder | grandis, 'large' | Euarchonta, Ferungulata |
| Mirorder | mirus, 'wonderful, strange' | Primatomorpha, Ferae, Euungulata |
| Order | Primates, Procolophonomorpha, Carnivora, Artiodactyla, Pilosa | |
| Suborder | sub, 'under' | Haplorrhini, Procolophonia, Whippomorpha, Vermilingua |
| Infraorder | infra, 'below' | Simiiformes, Tarsiiformes, Cetacea |
| Parvorder | parvus, 'small, unimportant' | Catarrhini, Odontoceti, Mysticeti |
In their 1997 classification of mammals, McKenna and Bell used two extra levels between superorder and order: grandorder and mirorder.[5] Michael Novacek (1986) inserted them at the same position. Michael Benton (2005) inserted them between superorder and magnorder instead.[6] This position was adopted by Systema Naturae 2000 and others.
Botany
In botany, the ranks of subclass and suborder are secondary ranks pre-defined as respectively above and below the rank of order.[7] Any number of further ranks can be used as long as they are clearly defined.[7]
The superorder rank is commonly used, with the ending Script error: No such module "Lang". that was initiated by Armen Takhtajan's publications from 1966 onwards.[8]
History
The order as a distinct rank of biological classification having its own distinctive name (and not just called a higher genus (Script error: No such module "Lang".)) was first introduced by the German botanist Augustus Quirinus Rivinus in his classification of plants that appeared in a series of treatises in the 1690s. Carl Linnaeus was the first to apply it consistently to the division of all three kingdoms of nature (then minerals, plants, and animals) in his Systema Naturae (1735, 1st. Ed.).
Botany
For plants, Linnaeus' orders in the Systema Naturae and the Species Plantarum were strictly artificial, introduced to subdivide the artificial classes into more comprehensible smaller groups. When the word Script error: No such module "Lang". was first consistently used for natural units of plants, in 19th-century works such as the Prodromus Systematis Naturalis Regni Vegetabilis of Augustin Pyramus de Candolle and the Genera Plantarum of Bentham & Hooker, it indicated taxa that are now given the rank of family (see ordo naturalis, 'natural order').
In French botanical publications, from Michel Adanson's Script error: No such module "Lang". (1763) and until the end of the 19th century, the word Script error: No such module "Lang". (plural: Script error: No such module "Lang".) was used as a French equivalent for this Latin Script error: No such module "Lang".. This equivalence was explicitly stated in the Script error: No such module "Lang".'s Script error: No such module "Lang". (1868), the precursor of the currently used International Code of Nomenclature for algae, fungi, and plants.
In the first international Rules of botanical nomenclature from the International Botanical Congress of 1905, the word family (Script error: No such module "Lang".) was assigned to the rank indicated by the French Script error: No such module "Lang"., while order (Script error: No such module "Lang".) was reserved for a higher rank, for what in the 19th century had often been named a 'cohort' (Script error: No such module "Lang".,[10] plural Script error: No such module "Lang".).
Some of the plant families still retain the names of Linnaean "natural orders" or even the names of pre-Linnaean natural groups recognized by Linnaeus as orders in his natural classification (e.g. Palmae or Labiatae). Such names are known as descriptive family names.
Zoology
In the field of zoology, the Linnaean orders were used more consistently. That is, the orders in the zoology part of the Systema Naturae refer to natural groups. Some of his ordinal names are still in use, e.g. Lepidoptera (moths and butterflies) and Diptera (flies, mosquitoes, midges, and gnats).[11]
Virology
From 1991 to 2017, order was the highest rank used to classify viruses in a system that ranged from order to species. In 2018, the International Committee on Taxonomy of Viruses, which oversees virus taxonomy, added ranks higher than order up to the highest taxonomic rank of realm. Virus orders are indicated by the suffix -virales.[12][13]
See also
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content.Tobin, Allan J.; Dusheck, Jennie (2005). Asking About Life. Boston: Cengage Learning. pp. 403–408. ISBN 978-0-030-27044-4.
- ^ Page Module:Citation/CS1/styles.css has no content.Translation Bureau (15 October 2015). "Capitalization: Biological Terms". Writing Tips, TERMIUM Plus®. Public Services & Procurement Canada. Retrieved 19 June 2020.
- ^ Lua error in package.lua at line 80: module 'Module:Footnotes/anchor_id_list' not found.
- ^ Page Module:Citation/CS1/styles.css has no content.Leo S. Berg (1940). Classification of fishes, both recent and fossil (PDF) (in русский and English). Ann Arbor Michigan: J. N. Edwards.
- ^ Page Module:Citation/CS1/styles.css has no content.McKenna, M.C. & Bell, S.G. (1997), Classification of Mammals, New York: Columbia University Press, ISBN 978-0-231-11013-6
- ^ Page Module:Citation/CS1/styles.css has no content.Benton, Michael J. (2005). Vertebrate Palaeontology (3rd ed.). Oxford: Blackwell Publishing. ISBN 978-0-63205-637-8.
- ^ a b Lua error in package.lua at line 80: module 'Module:Footnotes/anchor_id_list' not found.
- ^ Page Module:Citation/CS1/styles.css has no content.Naik, V.N. (1984), Taxonomy of Angiosperms, Tata McGraw-Hill, p. 111, ISBN 9780074517888
- ^ Page Module:Citation/CS1/styles.css has no content.Linnaeus, Carolus (1758). Systema naturae per regna tria naturae :secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latina) (10th ed.). Stockholm: Laurentius Salvius.
- ^ Page Module:Citation/CS1/styles.css has no content.Briquet, J. (1912). Règles internationales de la nomenclature botanique adoptées par le congrès international de botanique de Vienne 1905, deuxième edition mise au point d'après les décisions du congrès international de botanique de Bruxelles 1910; International rules of botanical nomenclature adopted by the International Botanical Congresses of Vienna 1905 and Brussels 1910; Internationale Regeln der botanischen Nomenclatur angenommen von den Internationalen Botanischen Kongressen zu Wien 1905 und Brüssel 1910. Jena: Gustav Fischer. Page 1.
- ^ Page Module:Citation/CS1/styles.css has no content.Carl von Linné, translated by William Turton (1806). Volume 2: Insects. A general system of nature: through the three grand kingdoms of animals, vegetables, and minerals, systematically divided into their several classes, orders, genera, species, and varieties. London: Lackington, Allen, and Co.
- ^ Page Module:Citation/CS1/styles.css has no content.International Committee on Taxonomy of Viruses Executive Committee (May 2020). "The New Scope of Virus Taxonomy: Partitioning the Virosphere Into 15 Hierarchical Ranks". Nat Microbiol. 5 (5): 668–674. doi:10.1038/s41564-020-0709-x. PMC 7186216. PMID 32341570.
- ^ Page Module:Citation/CS1/styles.css has no content."The International Code of Virus Classification and Nomenclature (ICVCN; the ICTV Code)". International Committee on Taxonomy of Viruses. March 2025. Retrieved 15 September 2025.
Works cited
- Page Module:Citation/CS1/styles.css has no content.McNeill, J.; Barrie, F.R.; Buck, W.R.; Demoulin, V.; Greuter, W.; Hawksworth, D.L.; Herendeen, P.S.; Knapp, S.; Marhold, K.; Prado, J.; Prud'homme Van Reine, W.F.; Smith, G.F.; Wiersema, J.H.; Turland, N.J. (2012). International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) adopted by the Eighteenth International Botanical Congress Melbourne, Australia, July 2011. Regnum Vegetabile. Vol. 154. A.R.G. Gantner Verlag KG. ISBN 978-3-87429-425-6.
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