subclass Dipnoi vs Dipnoi

subclass Dipnoi and Dipnoi both are nouns.

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

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

subclass Dipnoi and Dipnoi: bony fishes of the Southern Hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii

subclass Dipnoi (noun)	Dipnoi (noun)
bony fishes of the Southern Hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii	bony fishes of the Southern Hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii