class Chlorophyceae vs Chlorophyta

class Chlorophyceae and Chlorophyta both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Chlorophyceae	Yes	No	No	No
Chlorophyta	Yes	No	No	No

class Chlorophyceae (noun)	Chlorophyta (noun)
algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments	large division of chiefly freshwater eukaryotic algae that possess chlorophyll a and b, store food as starch, and cellulose cell walls; classes Chlorophyceae, Ulvophyceae, and Charophyceae; obviously ancestral to land plants