suborder Myxinoidei vs Myxinoidei

suborder Myxinoidei and Myxinoidei both are nouns.

Word	Noun	Adjective	Verb	Adverb
suborder Myxinoidei	Yes	No	No	No
Myxinoidei	Yes	No	No	No

As nouns, suborder Myxinoidei and Myxinoidei are synonyms defined as:

suborder Myxinoidei and Myxinoidei: hagfishes as distinguished from lampreys

Other synonyms of suborder Myxinoidei include Hyperotreta, Myxiniformes, Myxinoidea, suborder Hyperotreta, suborder Myxiniformes.

suborder Myxinoidei (noun)	Myxinoidei (noun)
hagfishes as distinguished from lampreys	hagfishes as distinguished from lampreys