Question

Short note - trinomial nomenclature

Answer 1

In zoology

Main article: trinomen

For animals, scientific names are governed by the International Code of Zoological Nomenclature. Only one rank is allowed below the rank of species: subspecies. For example, Buteo jamaicensis borealis is one of the subspecies of the red-tailed hawk species, Buteo jamaicensis.

In botany

Main article: infraspecific name (botany)

For algae, fungi, plants, and their fossils, there is an indeterminate number of infraspecific ranks allowed below the level of species. The secondary ranks below the species rank are variety and forma, and more ranks can be made by using the prefix "sub" to make subspecies, subvariety, subforma. Very rarely even more forms are created, such as supersubspecies. Not all of these ranks need to be specified, for example, some authors prefer to divide plant species into subspecies, while others prefer to use varieties.[1]

These ranks are components of a biological classification, for example Corylopsis sinensis var. calvescens f. veitchiana is an ornamental garden plant.[2] However, a name is not the same as a classification, and the name of this plant is a trinomial with only three parts,[3] the two parts of the species name Corylopsis sinensis, plus the forma epithet veitchiana, to give Corylopsis sinensis f. veitchiana.

Answer 2

Trinomial nomenclature. In biology,trinomial nomenclature is used toname living things at a rank lower than species. The term trinomial nomenclature means "three-partname" or "system of three-part names". If living things at a rank lower than species get a scientific name, each name has three parts.


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