crossopterygian vs bony fish

crossopterygian and bony fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
crossopterygian	Yes	No	No	No
bony fish	Yes	No	No	No

As nouns, bony fish is a hypernym of crossopterygian; that is, bony fish is a word with a broader meaning than crossopterygian:

crossopterygian: any fish of the order Crossopterygii; most known only in fossil form
bony fish: any fish of the class Osteichthyes

crossopterygian (noun)	bony fish (noun)
any fish of the order Crossopterygii; most known only in fossil form	any fish of the class Osteichthyes