class Lycopsida vs class Lycopodineae

class Lycopsida and class Lycopodineae both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Lycopsida	Yes	No	No	No
class Lycopodineae	Yes	No	No	No

class Lycopsida (noun)	class Lycopodineae (noun)
club mosses and related forms: includes Lycopodiales, Isoetales, Selaginellales, and extinct Lepidodendrales; sometimes considered a subdivision of Tracheophyta	alternative designation for the class Lycopsida