The Nevrorthidae - often incorrectly spelled "Neurorthidae" - are a small family of winged insects of the order Neuroptera. They are a living fossil. They were at one time placed in the Osmyloidea, with the Osmylidae and the spongillaflies (Sisyridae) as their closest relatives, but nowadays they are considered to be the most ancient lineage of living lacewings. Sometimes they are placed in a suborder Nevrorthiformia, but the quite basal position of the family is probably better expressed by placing them directly in the Neuroptera, without assigning the subordinal rank.