genus Tapirus vs mammal genus

genus Tapirus and mammal genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Tapirus	Yes	No	No	No
mammal genus	Yes	No	No	No

As nouns, mammal genus is a hypernym of genus Tapirus; that is, mammal genus is a word with a broader meaning than genus Tapirus:

genus Tapirus (noun)	mammal genus (noun)
type genus of the Tapiridae	a genus of mammals