Anostraca vs animal order

Anostraca and animal order both are nouns.

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

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

Anostraca: small aquatic crustaceans lacking a carapace: fairy shrimps; brine shrimps
animal order: the order of animals

Anostraca (noun)	animal order (noun)
small aquatic crustaceans lacking a carapace: fairy shrimps; brine shrimps	the order of animals