Superfamily Cephoiea Family Cephidae (stem sawflies) Superfamily Megalodontoidea Family Megalodontesidae Family Pamphiliidae (leaf-rolling & web-spinning sawflies) Superfamily Orussoidea Family Orussidae (parasitic wood wasps) Superfamily Siricoidea Family Anaxyelidae (cedar wood wasps) Family Siricidae (horntails) Superfamily Tenthredinoidea Family Argidae (argid sawflies) Family Blasticotomidae (fern sawflies) Family Cimbicidae (cimbicid sawflies) Family Diprionidae (conifer sawflies) Family Pergidae (pergid sawflies) Family Tenthredinidae (common sawflies) Superfamily Xyeloidea Family Xyelidae (xyelid sawflies) Family Xiphydriidae (wood wasps)