Isospondyli vs animal order

Isospondyli and animal order both are nouns.

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

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

Isospondyli: most primitive teleost fishes, all are soft-finned: salmon, trout, herring, shad, sardines, anchovies, whitefish, smelts, tarpon
animal order: the order of animals

Isospondyli (noun)	animal order (noun)
most primitive teleost fishes, all are soft-finned: salmon, trout, herring, shad, sardines, anchovies, whitefish, smelts, tarpon	the order of animals