Aplodontia vs mammal genus

Aplodontia and mammal genus both are nouns.

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

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

Aplodontia: type genus of the Aplodontiidae: comprising the mountain beavers
mammal genus: a genus of mammals

Aplodontia (noun)	mammal genus (noun)
type genus of the Aplodontiidae: comprising the mountain beavers	a genus of mammals