Pteridospermae vs group Pteridospermaphyta

Pteridospermae and group Pteridospermaphyta both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pteridospermae	Yes	No	No	No
group Pteridospermaphyta	Yes	No	No	No

As nouns, Pteridospermae and group Pteridospermaphyta are synonyms defined as:

Pteridospermae and group Pteridospermaphyta: used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales

Other synonyms of Pteridospermae include group Pteridospermae, Pteridospermaphyta.

Pteridospermae (noun)	group Pteridospermaphyta (noun)
used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales	used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales