subclass Heterobasidiomycetes vs Heterobasidiomycetes

subclass Heterobasidiomycetes and Heterobasidiomycetes both are nouns.

Word	Noun	Adjective	Verb	Adverb
subclass Heterobasidiomycetes	Yes	No	No	No
Heterobasidiomycetes	Yes	No	No	No

As nouns, subclass Heterobasidiomycetes and Heterobasidiomycetes are synonyms defined as:

subclass Heterobasidiomycetes and Heterobasidiomycetes: category used in some classification systems for various basidiomycetous fungi including rusts and smuts

subclass Heterobasidiomycetes (noun)	Heterobasidiomycetes (noun)
category used in some classification systems for various basidiomycetous fungi including rusts and smuts	category used in some classification systems for various basidiomycetous fungi including rusts and smuts