What is a genus?
A genus is a taxonomic group that is between the family and the species.
A genus consists of very closely related organisms called species, though some have only one species. All members of a species are in the same genus.
The first name in a binomial scientific name is the genus and it is always capitalized. The second name is the species name, which is never capitalized. An example is Canis lupus , the scientific name for the gray wolf, in which Canis is the genus and lupus is the species.