subclass Selachii vs Selachii

subclass Selachii and Selachii both are nouns.

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

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

Other synonyms of subclass Selachii include Elasmobranchii, subclass Elasmobranchii.

subclass Selachii (noun)	Selachii (noun)
sharks, rays, dogfishes, skates	sharks, rays, dogfishes, skates