class Equisetatae vs class Sphenopsida

class Equisetatae and class Sphenopsida both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Equisetatae	Yes	No	No	No
class Sphenopsida	Yes	No	No	No

As nouns, class Equisetatae and class Sphenopsida are synonyms defined as:

Other synonyms of class Equisetatae include Equisetatae, Sphenopsida.

class Equisetatae (noun)	class Sphenopsida (noun)
horsetails and related forms	horsetails and related forms