class Sporozoa vs subclass Acnidosporidia

class Sporozoa and subclass Acnidosporidia both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Sporozoa	Yes	No	No	No
subclass Acnidosporidia	Yes	No	No	No

class Sporozoa (noun)	subclass Acnidosporidia (noun)
strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites	a subclass of Sporozoa