Mysticeti vs animal order

Mysticeti and animal order both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mysticeti	Yes	No	No	No
animal order	Yes	No	No	No

As nouns, animal order is a hypernym of Mysticeti; that is, animal order is a word with a broader meaning than Mysticeti:

Mysticeti (noun)	animal order (noun)
baleen whales: right whales, rorquals, blue whales, humpbacks	the order of animals