subclass Selachii vs subclass Elasmobranchii

subclass Selachii and subclass Elasmobranchii both are nouns.

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

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

subclass Selachii and subclass Elasmobranchii: sharks, rays, dogfishes, skates

Other synonyms of subclass Selachii include Elasmobranchii, Selachii.

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