3) Binomial nomenclature In taxonomy, the binomial name, binomial name, binomial is a combination of two 
words used to designate a species. It consists of following the genus name with the name of the species. It is a 
method of scientific designation of species imagined by Linnaeus in the 17th century. 
1st word of the Latin name = genus, in italics with capital letter . 
2nd word = the specific epithet, in italics and starting with a lowercase letter . 
 
I
 
 

 
 Kingdoms : currently there are 6 kingdoms , the first 
4 of which are composed of eukaryotic organisms : 
Animals_Plants_Protists_Fungi_Archaea_Bacteri
 a ( The last 2 kingdoms are represented by 
prokaryotic organisms . ) 
 A first diversification of the Kingdoms leads to its 
subdivision into several branches, the branch into 
classes; each class will be split into orders, families, 
genera, up to the species which constitutes the unit of 
classification. 
 A branch (or phylum or division) corresponds to 
the second rank in the classification of living 
beings, just below the kingdom (animals, plants, 
fungi, protists, bacteria, archaea), and just above the 
class. 
 The variations are sometimes so complex that they 
lead to the definition of sub-phyla, super-classes, 
subclasses, super-orders... and sometimes even sub
species or races which are subdivisions of species, 
most of them geographical.