There are currently 1,258 genera, which are split into 156 families and subclassified into 27 orders, with a total of 5,937 extant mammalian species recognized.
What is genus?
In biology, genus (plural genera) is a taxonomic rank used to categorize living and dead organisms, as well as viruses.
Throughout the biological classification hierarchy, the genus is positioned above species and below a family.
In binomial nomenclature, the genus-species name is the initial element of the binomial species name for every species belonging to the genus.
You can learn more about taxonomic rank here:
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