In this article we will discuss about binomial and trinomial nomenclature of animals.
Binomial Nomenclature:
The scientific method of naming plants and animals by applying two components where the first component is generic and the second part is specific, is called binomial nomenclature. It was evolved by Linnaeus and adopted by the International Code of Zoological Nomenclature.
Scientific names of a few common animals are given below:
Rohu—Labeo rohita,
Pigeon—Columba livia,
Tiger—Panthera tigris.
Trinomial Nomenclature:
Sometimes it becomes imperative to recognise subspecies within a species and is given a third specific name. Such system of naming is known as Trinomial nomenclature. The scientific name of the lion is Panthera leo (Linn.). The same species of the specimen collected in different countries shows minor differences from the original form. So a third sub-specific name becomes necessary in many cases.
The scientific name of the Indian lion is designated as Panthera leo persica (Linn.). A trinomen is used to recognise a subspecies. International Rules of Zoological Nomenclature recognised the trinomial nomenclature.
The adoption of Latinised names for the organisms and the scheme of classification according to hierarchy are the two main themes of the classificatory secret of Linnaeus. The selection of Latin as the language of nomenclature is quite reasonable because it remains unchanged through generations and is not subjected to grammatical changes as it happens in other vernacular languages.