Superorder Neuropterida Order Megaloptera Latreille, 1802 - alderflies Family Sialidae Leach, 1815 - alderflies Genus Sialis Latreille, 1802 - alderfly Subgenus Protosialis van der Weele, 1909 †Sialis casca M.S. Engel & D.A. Grimaldi, 2007