genus Nyctimene vs mammal genus

genus Nyctimene and mammal genus both are nouns.

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

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

genus Nyctimene (noun)	mammal genus (noun)
East Indian fruit bats	a genus of mammals