Trinomial nomenclature
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In biology, trinomial nomenclature is the system of names for taxa below the rank of species. These names have three parts. The usage is different in zoology and botany.
The trinomen of the critically endangered western lowland gorilla is Gorilla gorilla gorilla.
The trinominal name of this subspecies of the Chinese winter hazel is Corylopsis sinensis f. calvescens.
Subspecies
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A subspecies is a taxonomic rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics, but that can successfully interbreed. Not
Trinomial nomenclature
…The usage is different in zoology and botany. In zoological nomenclature, a trinomen (pl. trinomina), trinominal name, or ternary name is the name of a subspecies. A trinomen is a name with three parts: generic name, specific name and subspecific name. The first two parts alone form the binomen or species name…
Ceylon paradise flycatcher (Terpsiphone paradisi ceylonensis), an Indian paradise flycatcher subspecies native to Sri Lanka
African leopard (Panthera pardus pardus), the nominotypical (nominate or definitive) leopard subspecies native to Africa
Sunda Island tiger (P. tigris sondaica), a tiger subspecies native to the Sunda islands
The Indian rhinoceros (Rhinoceros unicornis) is a monotypic species.