Temporal range: Late Cretaceous–recent
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.
- Engel, Michael S. & Grimaldi, David A. (2007): The neuropterid fauna of Dominican and Mexican amber (Neuropterida, Megaloptera, Neuroptera). American Museum Novitates 3587: 1-58. PDF fulltext
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