class Xanthophyceae vs Xanthophyceae

class Xanthophyceae and Xanthophyceae both are nouns.

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

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

class Xanthophyceae (noun)	Xanthophyceae (noun)
yellow-green algae	yellow-green algae