The scientific name of the domestic dog is Canis lupus familiaris. From this name, it can be deduced that the dog belongs to the genus

In binomial nomenclature, the first word of a scientific name always represents the genus and is written with a capital letter. Therefore, Canis is the genus name for the domestic dog. The term 'lupus familiaris' represents the subspecies designation, while 'familiaris' alone indicates the subspecies.