genus Euarctos vs mammal genus

genus Euarctos and mammal genus both are nouns.

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

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

genus Euarctos: American black bears; in some classifications not a separate genus from Ursus
mammal genus: a genus of mammals

genus Euarctos (noun)	mammal genus (noun)
American black bears; in some classifications not a separate genus from Ursus	a genus of mammals