genus Tamias vs mammal genus

genus Tamias and mammal genus both are nouns.

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

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

genus Tamias (noun)	mammal genus (noun)
chipmunks of eastern North America	a genus of mammals