family Bovidae vs mammal family

family Bovidae and mammal family both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Bovidae	Yes	No	No	No
mammal family	Yes	No	No	No

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

family Bovidae (noun)	mammal family (noun)
true antelopes; cattle; oxen; sheep; goats	a family of mammals