Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859 Class Nematoda Gegenbaur, 1859 Subclass Penetrantia Order Dorylaimida Pearse, 1942 Suborder Diphtherophoridae 80 Family Diphtherophoridae Micoletzky, 1922 81 Family Trichodoridae Thorne, 1935