A group of closely related species is known as a genus. In taxonomic classification, species are defined as a group of organisms that produce viable offspring through interbreeding. Species that share similar morphological or genetic traits or characteristics are grouped into one genus.
Taxonomic hierarchies define species as the fundamental unit from which all other classifications are derived. Similar species are grouped into genera. For example, the domestic cat belongs to the genus Felis. Domestic cats and sand cats from North Africa belong to the same genus due to similar morphological and genetic characteristics. When writing the scientific name of a species in Latin, the genus is followed by the species name (e.g., Felis catus).