order Dictyoptera vs class Hexapoda

order Dictyoptera and class Hexapoda both are nouns.

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

order Dictyoptera (noun)	class Hexapoda (noun)
in some classifications replaced by the orders (here suborders) Blattodea (cockroaches) and Manteodea (mantids); in former classifications often subsumed under a much broader order Orthoptera	insects; about five-sixths of all known animal species