Ephemerida vs animal order

Ephemerida and animal order both are nouns.

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

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

Ephemerida (noun)	animal order (noun)
the order of mayflies or shadflies (Ephemeroptera, Ephemerida)	the order of animals