genus Mammut vs mammal genus

genus Mammut and mammal genus both are nouns.

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

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

genus Mammut (noun)	mammal genus (noun)
extinct type genus of the Mammutidae: mastodons	a genus of mammals