genus Ovibos vs mammal genus

genus Ovibos and mammal genus both are nouns.

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

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

genus Ovibos (noun)	mammal genus (noun)
consisting of the musk-ox	a genus of mammals