neuropteran vs neuropteron

neuropteran and neuropteron both are nouns.

Word	Noun	Adjective	Verb	Adverb
neuropteran	Yes	No	No	No
neuropteron	Yes	No	No	No

As nouns, neuropteran and neuropteron are synonyms defined as:

neuropteran and neuropteron: insect having biting mouthparts and four large membranous wings with netlike veins

Other synonyms of neuropteran include neuropterous insect.

neuropteran (noun)	neuropteron (noun)
insect having biting mouthparts and four large membranous wings with netlike veins	insect having biting mouthparts and four large membranous wings with netlike veins