Elasmobranchii vs subclass Elasmobranchii

Elasmobranchii and subclass Elasmobranchii both are nouns.

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

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

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

Other synonyms of Elasmobranchii include Selachii, subclass Selachii.

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