subclass Diapsida vs Diapsida

subclass Diapsida and Diapsida both are nouns.

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

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

subclass Diapsida and Diapsida: used in former classifications to include all living reptiles except turtles; superseded by the two subclasses Lepidosauria and Archosauria

subclass Diapsida (noun)	Diapsida (noun)
used in former classifications to include all living reptiles except turtles; superseded by the two subclasses Lepidosauria and Archosauria	used in former classifications to include all living reptiles except turtles; superseded by the two subclasses Lepidosauria and Archosauria