subclass Infusoria vs Infusoria

subclass Infusoria and Infusoria both are nouns.

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

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

subclass Infusoria and Infusoria: in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter

subclass Infusoria (noun)	Infusoria (noun)
in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter	in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter