genus Panthera vs mammal genus

genus Panthera and mammal genus both are nouns.

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

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

genus Panthera: lions, leopards, snow leopards, jaguars, tigers, cheetahs, saber-toothed tigers
mammal genus: a genus of mammals

genus Panthera (noun)	mammal genus (noun)
lions, leopards, snow leopards, jaguars, tigers, cheetahs, saber-toothed tigers	a genus of mammals