class Phaeophyceae vs Phaeophyceae

class Phaeophyceae and Phaeophyceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Phaeophyceae	Yes	No	No	No
Phaeophyceae	Yes	No	No	No

As nouns, class Phaeophyceae and Phaeophyceae are synonyms defined as:

class Phaeophyceae and Phaeophyceae: brown algae; mostly marine and littoral eukaryotic algae

class Phaeophyceae (noun)	Phaeophyceae (noun)
brown algae; mostly marine and littoral eukaryotic algae	brown algae; mostly marine and littoral eukaryotic algae