 Most are known from the Oligocene; the Late Jurassic "Mesascalaphus" may be an entirely more basal member of the family.but it is now believed to be a member of Mesochrysopidae .Fossil owlfly genera "incertae sedis" include "Ascaloptynx", "Borgia", "Mesascalaphus", "Neadelphus", "Prosuhpalacsa" and "Ricartus".