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This article is about the naming of animals. Trinomen_sentence_0

For the naming of plants and fungi, see Infraspecific name (botany). Trinomen_sentence_1

Main article: Subspecies § Nomenclature Trinomen_sentence_2

In zoological nomenclature, a trinomen (plural: trinomina), trinominal name, or ternary name, refers to the name of a subspecies. Trinomen_sentence_3

For example: "Gorilla gorilla gorilla" (Savage, 1847) for the western lowland gorilla (genus Gorilla, species western gorilla). Trinomen_sentence_4

Also, "Bison bison bison" (Linnaeus, 1758) for the plains bison (genus Bison, species American bison). Trinomen_sentence_5

A trinomen is a name with three parts: generic name, specific name and subspecific name. Trinomen_sentence_6

The first two parts alone form the binomen or species name. Trinomen_sentence_7

All three names are typeset in italics, and only the first letter of the generic name is capitalised. Trinomen_sentence_8

No indicator of rank is included: in zoology, subspecies is the only rank below that of species. Trinomen_sentence_9

For example: "Buteo jamaicensis borealis is one of the subspecies of the red-tailed hawk (Buteo jamaicensis)." Trinomen_sentence_10

In a taxonomic publication, a name is incomplete without an author citation and publication details. Trinomen_sentence_11

This indicates who published the name, in what publication, and the date of the publication. Trinomen_sentence_12

For example: "Phalacrocorax carbo novaehollandiae (Stephens, 1826)" denotes a subspecies of the great cormorant (Phalacrocorax carbo) introduced by James Francis Stephens in 1826 under the subspecies name novaehollandiae ("of New Holland"). Trinomen_sentence_13

If the generic and specific name have already been mentioned in the same paragraph, they are often abbreviated to initial letters. Trinomen_sentence_14

For example one might write: "The great cormorant Phalacrocorax carbo has a distinct subspecies in Australasia, the black shag P. c. novaehollandiae". Trinomen_sentence_15

While binomial nomenclature came into being and immediately gained widespread acceptance in the mid-18th century, it was not until the early 20th century that the current unified standard of trinominal nomenclature was agreed upon. Trinomen_sentence_16

This became the standard mainly because of tireless promotion by Elliott Coues – even though trinomina in the modern usage were pioneered in 1828 by Carl Friedrich Bruch and around 1850 was widely used especially by Hermann Schlegel and John Cassin. Trinomen_sentence_17

As late as the 1930s, the use of trinomina was not fully established in all fields of zoology. Trinomen_sentence_18

Thus, when referring especially European works of the preceding era, the nomenclature used is usually not in accord with contemporary standards. Trinomen_sentence_19

See also Trinomen_section_0


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