Malacopterygii vs superorder Malacopterygii

Malacopterygii and superorder Malacopterygii both are nouns.

Word	Noun	Adjective	Verb	Adverb
Malacopterygii	Yes	No	No	No
superorder Malacopterygii	Yes	No	No	No

As nouns, Malacopterygii and superorder Malacopterygii are synonyms defined as:

Malacopterygii and superorder Malacopterygii: an extensive group of teleost fishes having fins supported by flexible cartilaginous rays

Malacopterygii (noun)	superorder Malacopterygii (noun)
an extensive group of teleost fishes having fins supported by flexible cartilaginous rays	an extensive group of teleost fishes having fins supported by flexible cartilaginous rays