acanthopterygian vs teleostan

acanthopterygian and teleostan both are nouns.

Word	Noun	Adjective	Verb	Adverb
acanthopterygian	Yes	No	No	No
teleostan	Yes	No	No	No

As nouns, teleostan is a hypernym of acanthopterygian; that is, teleostan is a word with a broader meaning than acanthopterygian:

acanthopterygian: a teleost fish with fins that are supported by sharp inflexible rays
teleostan: a bony fish of the subclass Teleostei

Other hypernyms of acanthopterygian include teleost, teleost fish.

acanthopterygian (noun)	teleostan (noun)
a teleost fish with fins that are supported by sharp inflexible rays	a bony fish of the subclass Teleostei