orthopteron vs orthopterous insect

orthopteron and orthopterous insect both are nouns.

Word	Noun	Adjective	Verb	Adverb
orthopteron	Yes	No	No	No
orthopterous insect	Yes	No	No	No

As nouns, orthopteron and orthopterous insect are synonyms defined as:

orthopteron and orthopterous insect: any of various insects having leathery forewings and membranous hind wings and chewing mouthparts

Other synonyms of orthopteron include orthopteran.

orthopteron (noun)	orthopterous insect (noun)
any of various insects having leathery forewings and membranous hind wings and chewing mouthparts	any of various insects having leathery forewings and membranous hind wings and chewing mouthparts