genus Ictonyx vs mammal genus

genus Ictonyx and mammal genus both are nouns.

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

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

genus Ictonyx: a genus of Mustelidae, containing the Saharan striped polecat and the striped polecat (Ictonyx)
mammal genus: a genus of mammals

genus Ictonyx (noun)	mammal genus (noun)
a genus of Mustelidae, containing the Saharan striped polecat and the striped polecat (Ictonyx)	a genus of mammals