Superorder Neuropterida
   Order Megaloptera Latreille, 1802 - alderflies
     Family Sialidae Leach, 1815 - alderflies
       Genus Sialis Latreille, 1802 - alderfly
         1 †Sialis strausi Illies, 1967
         2 †Sialis groehni Wichard, 1997
         3 †Sialis muratensis Nel, 1988a
         4 Subgenus Protosialis van der Weele, 1909