suborder Osteostraci vs Osteostraci

suborder Osteostraci and Osteostraci both are nouns.

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

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

suborder Osteostraci and Osteostraci: extinct group of armored fish-like vertebrates; taxonomy is not clear

Other synonyms of suborder Osteostraci include Cephalaspida, suborder Cephalaspida.

suborder Osteostraci (noun)	Osteostraci (noun)
extinct group of armored fish-like vertebrates; taxonomy is not clear	extinct group of armored fish-like vertebrates; taxonomy is not clear