Mantophasmatodea vs class Hexapoda

Mantophasmatodea and class Hexapoda both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mantophasmatodea	Yes	No	No	No
class Hexapoda	Yes	No	No	No

Mantophasmatodea (noun)	class Hexapoda (noun)
an order of insect identified in 2002 in a 45 million year old piece of amber from the Baltic region	insects; about five-sixths of all known animal species