ganoid fish vs teleostan

ganoid fish and teleostan both are nouns.

Word	Noun	Adjective	Verb	Adverb
ganoid fish	Yes	No	No	No
teleostan	Yes	No	No	No

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

ganoid fish: primitive fishes having thick bony scales with a shiny covering
teleostan: a bony fish of the subclass Teleostei

Other hypernyms of ganoid fish include teleost, teleost fish.

ganoid fish (noun)	teleostan (noun)
primitive fishes having thick bony scales with a shiny covering	a bony fish of the subclass Teleostei