class Hexapoda vs order Thysanoptera

class Hexapoda and order Thysanoptera both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Hexapoda	Yes	No	No	No
order Thysanoptera	Yes	No	No	No

class Hexapoda (noun)	order Thysanoptera (noun)
insects; about five-sixths of all known animal species	the order of thrips (Thysanoptera)